key: cord-0799140-n1cy8jc1 authors: Eisner, Emily; Lewis, Shôn; Stockton-Powdrell, Charlotte; Agass, Ria; Whelan, Pauline; Tower, Clare title: Digital screening for postnatal depression: mixed methods proof-of-concept study date: 2022-05-23 journal: BMC Pregnancy Childbirth DOI: 10.1186/s12884-022-04756-2 sha: c6f6cc4aa7047c1588212accd4676fd244a463fe doc_id: 799140 cord_uid: n1cy8jc1 BACKGROUND: Depression during the postnatal year is prevalent in mothers (17%) and fathers (9%), and suicide is the leading cause of maternal death in this period. Lifelong costs and consequences of untreated postnatal depression (PND) are high due to impacts on infants as well as parents. We aimed to improve access to PND treatment using digital screening. We developed a smartphone app (ClinTouch DAWN-P) that allows parents to monitor their mood daily with the Edinburgh Postnatal Depression Scale (EPDS), uploading responses in real-time to a secure server. We evaluated the app’s feasibility, acceptability, validity and safety in a proof-of-concept study. METHODS: Pregnant women (≥ 36 weeks gestation) and partners were recruited from antenatal services and invited to complete daily EPDS assessments via the ClinTouch DAWN-P app until 6 weeks postpartum. Participants completed standard paper-based EPDS at two time points for validity comparisons. We examined app acceptability and usability at 6 weeks postpartum with qualitative interviews, examined using framework analysis, and the abridged Mobile App Rating Scale (convergent mixed methods design). RESULTS: Most (96%) eligible pregnant women approached were keen to try the app. Participating mothers (n = 15) and partners/fathers (n = 8) found the app easy to use, and 91% continued to use it for the full study period. Overall, 67% of daily app-based assessments were completed, with a history of depression predicting lower app usage. Participants suggested modifications to the app and its deployment to improve usability (e.g., extending the response window and including feedback and parenting advice). The validity of app-based responses was confirmed by high agreement with standard EPDS. App-based and paper-based ratings showed perfect agreement in identifying cases of likely PND. There were no serious adverse events relating to app use. CONCLUSIONS: Digital PND screening appears feasible, acceptable, valid and safe. It also benefits from being remotely delivered: we enrolled all participants remotely during the first COVID-19 lockdown. Use of digital screening could address known shortcomings of conventional health visitor-delivered screening such as limited staff time, parental unwillingness to disclose difficulties to a professional, lack of partner/father screening, and language barriers. TRIAL REGISTRATION: The study was prospectively registered (Clinicaltrials.gov: NCT04279093). SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12884-022-04756-2. Meta-analyses indicate that 17% mothers [1, 2] and 9% fathers [3] experience major depression within the postnatal year. Suicide is the leading cause of maternal death in this period [4] . Although diagnostically identical to depression at other times [5] , the consequences [6] and Open Access *Correspondence: emily.eisner@manchester.ac.uk costs [7] of postnatal depression are substantially greater due to adverse effects on infants as well as parents [4, [8] [9] [10] . A child's first two years present a unique window of opportunity to build strong foundations for good future physical and mental health [10] . Parental postnatal depression hugely impacts children's experiences during those critical days [6] . Children of parents with postnatal depression demonstrate poorer cognitive, emotional and behavioural development, and greater morbidity and mortality [6, 11] . Postnatal depression negatively impacts parent-infant bonding, parental quality of life, health and social functioning [6, 11] . The lifelong consequences of untreated postnatal depression for children and parents cost UK health and social care approximately £1.2 billion per one-year birth cohort [7] . Increasing access to high-quality perinatal mental healthcare is recognised as a key strategic priority for the UK National Health Service (NHS Long Term Plan) [12] . However, in order to offer treatment, services must first identify which parents need it. The Edinburgh Postnatal Depression Scale (EPDS) is a 10-item screening measure which detects postnatal depression with 81% sensitivity and 88% specificity [13] . Current UK guidelines recommend that health professionals consider using two brief screening questions at each postnatal contact and then, if symptoms are detected, use the EPDS. However, national reports [7] [8] [9] and our local audit data (unpublished) suggest more than half of cases of postnatal depression currently go undetected and untreated. A practical, cost-effective solution is needed to increase screening effectiveness, identify postnatal depression in a timely manner and facilitate access to appropriate help. This solution should address known barriers, including: • Limited staff time for screening, and heterogeneous timing/frequency of pre-and postnatal contacts [14] . • Parental unwillingness to disclose mental health difficulties to health professionals [15] . • Language barriers (e.g. 20% of Manchester adults have a non-English main language) [16, 17] . • Lack of partner/father screening [18] . This is now recommended practice in the NHS Long Term Plan [12] and good practice guidelines [19] . Most (94%) people of childbearing age own a smartphone [20, 21] , presenting a clear opportunity for a digital screening solution. We developed the ClinTouch DAWN-P smartphone app, which prompts parents each day to answer the ten EPDS questions. Responses are then uploaded in real time to a secure server where they are accessible to clinicians via a password-protected web interface. Unlike the traditional paper-based EPDS, which asks parents how they have felt over the past week, the ClinTouch DAWN-P app asks parents daily how they have felt over the past 24 h, minimising retrospective recall bias. To our knowledge, this is the first study to test a daily version of the EPDS. We anticipate that, compared to traditional face-toface health visitor screening, a smartphone app can make screening more efficient, effective and inclusive, whilst retaining high concurrent validity with traditional screening measures. Specifically: • More efficient: less resource intensive than staffdelivered screening, saving staff time. • More effective: more parents are screened, with more regular and frequent assessments. • More inclusive: an app can be made available in multiple languages and scaled up at relatively low cost, allowing partners/fathers to also be screened. Apps are widely used for everyday purposes, making them a low stigma way of assessing mental health [22] . • High concurrent validity: high agreement between daily app-assessed EPDS and traditional weekly paper-based EPDS responses. Existing reviews [23] [24] [25] and our own systematic search of published studies and clinical trial registries found no studies examining the feasibility and acceptability of repeated-measures smartphone-based postnatal depression screening. For the antenatal period, we found two published studies testing one-off, in-clinic depression screening via tablet computer [26, 27] and four studies examining daily [28, 29] , weekly [29] , monthly [30] or tri-monthly [31] smartphone-based antenatal depression screening [30, 31] or monitoring [28, 29] . We found protocols for studies testing fortnightly email-based [32] or SMS-based [33] mental health and/or substance use screening, but none testing a smartphone app postnatally. We found no studies testing digital screening/monitoring of fathers'/partners' mental health. The current mixed-methods proof-of-concept study aimed to examine: i) The feasibility and safety of using the ClinTouch DAWN-P system to screen for parental depression from late pregnancy (≥ 36 weeks) until 6 weeks postnatally; ii) App usage patterns, usability and acceptability; iii) The preliminary validity of daily app-based EPDS assessments, compared to gold standard weekly paper-based reports. We plan to report additional qualitative data in a follow-up paper exploring participants' first-person experiences of using an app for postnatal depression screening. This study had three phases. First, cross-sectional assessments checked eligibility and characterized the sample. Second, participants used the ClinTouch DAWN-P app from ≥ 36 weeks gestation until 6 weeks postpartum. Third, at 6 weeks postpartum, app/study experiences and acceptability were explored using mixed qualitative and quantitative methods. A convergent mixed methods design was appropriate as it enabled us to quantify acceptability across the sample (using a questionnaire) and to explore how to improve the app and study design for future iterations (in qualitative interviews). Quantitative and qualitative findings were integrated narratively using a contiguous approach [34] . Ethical approval was obtained from Greater Manchester East Research Ethics Committee (19/NW/0763) and the study was registered (Clinicaltrials.gov: NCT04279093). Inclusion criteria for pregnant women were: ≥ 36 weeks' gestation, aged over 18 years, fluent in English, under the care of Manchester University NHS Foundation Trust, informed consent. Exclusion criteria were: current stillbirth, fetal abnormality, or multiple pregnancy. Where present, partners of participating pregnant women were invited to participate. Partner inclusion criteria were: male/female partner of a pregnant participant, aged over 18 years, fluent in English, informed consent. Pregnant women were recruited from non-emergency antenatal services at St Mary's Hospital, and via social media adverts. St Mary's is a large maternity hospital operating across Greater Manchester, an area with high levels of ethnic and cultural diversity (30% identify as a non-White ethnicity [16] ) and deprivation (43% of Manchester neighbourhoods are highly deprived [35] ). Senior clinicians (CT, RA) identified potential participants and obtained consent to pass individuals' contact details to a researcher who completed the informed consent process via phone. Individuals responding to social media adverts contacted the researcher directly. Partners were recruited via pregnant participants. Clinicians and researchers clarified that participation was voluntary. To inform feasibility outcomes, eligible pregnant women or partners who chose not to participate were invited to briefly state their reasons. Android and iOS versions of the ClinTouch DAWN-P smartphone app were available via the app stores during the study. The app alerts the user once per day, using a beep and visual notification, to answer the ten Edinburgh Postnatal Depression Scale (EPDS) items. Each item is displayed in turn along with four possible responses, chosen via radio buttons (supplementary Fig. 1 ). Items and response options reproduce the questions and sequence of the original EPDS. App alerts are timed pseudo-randomly once per day between 9am and 7 pm. The user has a 2-h response window in which to complete the EPDS. They can press a 'snooze' button to receive a reminder 30 min after the initial alert. Participants rate the items for presence and severity since the previous daily alert. Participants' responses are wirelessly uploaded in real time to a secure server. The research team can view responses via a password-protected web interface. The app did not meet requirements for registration as a medical device by the Medicines and Healthcare products Regulatory Agency (MHRA). The EPDS is a ten item screening measure, usually used in person by health visitors. The English version has been extensively validated in perinatal women (IPD meta-synthesis: sensitivity 81%, specificity 88% [13] ) and validated versions exist in numerous other languages including Urdu [36] , Punjabi [36] , Arabic [37] , Cantonese [38] , Persian/Farsi [39] , Bangla [40] and Romanian [41] . Seven published studies examining the scale's validity in partners/fathers report heterogeneous findings [18] . Original and translated EPDS versions ask parents to recall their mood over the past week. The current study is the first to test a daily version of the EPDS. Participants were enrolled during the first wave of the COVID-19 pandemic, so all study procedures were conducted remotely via a combination of telephone calls, SMS messages, email and post. Participants received £60 in shopping vouchers for participating: £20 each for baseline and exit phone calls, and a further £20 on completing the app use phase. They also received £10 phone credit per month of the app use phase. Financial incentives were not contingent on a certain number of daily EPDS assessments being completed. Following eligibility checks and informed consent, participants answered demographic questions (verbally via phone) about: age, gender, ethnicity, employment status, whether English was their first language, and past psychiatric history. Further information was gathered from pregnant participants' health records: BMI, past psychiatric history, answers to mental health screening questions at booking appointment, details of current childbirth (mode of delivery, live/still birth, any major obstetric complications), parity (total number of pregnancies reaching viable gestational age). The researcher then provided verbal and written instructions about how to download, install, configure and use the DAWN-P app. Smartphones were available to borrow if necessary. Participants practiced answering app questions to check they felt confident doing so. Participants were asked to answer daily EPDS questions via the app from study entry (≥ 36 weeks' gestation) until 6 weeks postpartum. As birth could occur at any point between study entry and 42 weeks' gestation, the exact length of the app use phase varied from 6-12 weeks' duration. To ensure participant safety, app-generated EPDS responses were checked daily by a researcher. Any response of "yes, quite often" or "sometimes" to the EPDS self-harm question ("The thought of harming myself has occurred to me") was communicated to the participant's GP within one working day. All participants were informed of this process during consent. Aside from self-harm disclosures (n = 1), no other information from app-reported EPDS was communicated to GPs. Participants received a brief phone call from the researcher after one week of app use, and fortnightly thereafter, to troubleshoot technical difficulties, address queries/concerns and monitor adverse events. Adverse events were recorded, then classified by a consultant obstetrician (CT) as related or unrelated to app use. Participants completed a conventional paper EPDS after one week of app use and again at 6 weeks postpartum (for validity comparisons with daily appreported EDPS). If paper EPDS total score was ≥ 12, the researcher sought the participant's permission to communicate this to their GP. If they declined, information was only communicated if there was risk of harm to self/others. In this proof-of-concept study, information from app-reported EPDS was not sent to health professionals. In a final phone call at 6 weeks postpartum, app/study experiences and acceptability were explored using a quantitative assessment and qualitative interviews. Quantitative assessment Participants completed a 12-item version of Mobile App Rating Scale (MARS) [42, 43] prior to the interview. The MARS has high internal consistency (alpha = 0.90) and interrater reliability (ICC = 0.79). Qualitative interviews All participants, including those who dropped out of the app use phase, were invited to participate in an individual semi-structured interview exploring a) their experiences of the app, b) their experiences of the study, and c) their views on the acceptability of each. Interviews followed a detailed topic guide (available on request) including questions on: app acceptability, look and feel; item content, layout, wording and response format; length and frequency of assessments; worries about app use; how app use fitted with participants' routines; and other experiences of using the app. The topic guide allowed flexibility in terms of question order and wording, with probe questions used to prompt further elaboration. The topic guide was updated iteratively. Interviews were conducted by the first author, a female postdoctoral researcher with prior experience conducting and analysing qualitative interviews and with personal, lived experience of postnatal depression. The interviewer had prior phone/email contact with participants throughout the study but never met them in person. Interviews were conducted via phone and were audio recorded and later transcribed verbatim. The study research questions, outcomes and analyses are summarised in Table 1 . Additional details of statistical and qualitative analyses are provided below. Statistical analyses were conducted in Stata (version 14.0) and considered statistically significant at p < 0.05. As the sample size in this proof-of-concept study was small, no adjustment was made to account for multiple comparisons. The a priori "accept" criterion for app engagement was ≥ 33% daily EPDS completed, and the "target" criterion was 50% of participants completing 50%. Validity Is it valid to use a smartphone app for this purpose? Data from first and last weeks of app-use phase: • App-generated daily EPDS (up to 7 data-points per person per week, averaged across the week for comparison with paper EPDS) • Gold-standard weekly paper EPDS Agreement between app and paper EPDS data examined for two separate one-week periods using: • Intra-class correlation (total EPDS scores, continuous variable) • Weighted kappa (individual item scores, ordinal) Safety Is it safe to use a smartphone app for this purpose? • Number of minor and major adverse events during the study • Descriptive statistics of the number of minor/major adverse events and whether these appear to be are related/unrelated to app use Is the app easy to use? Do parents find it acceptable to use a smartphone app for this purpose? • Abridged Mobile App Rating Scale • Qualitative interview data regarding usability and acceptability of the app • Descriptive statistics of quantitative data from the abridged Mobile App Rating Scale • Framework analysis of qualitative data (a priori themes relating to usability/acceptability) User experiences (follow-up paper) What are parents' experiences of using an app for this purpose? What are parents' experiences of the study procedures? • Qualitative interview data regarding experiences of app use and study procedures • Framework analysis of qualitative data (a posteriori themes), to be published in a follow-up paper The research team conducted a framework analysis of qualitative interviews using a combination of deductive and inductive coding [44] . This was appropriate as we aimed to investigate specific issues regarding app/ study acceptability (a priori themes. e.g., app look/feel), and also to explore unanticipated aspects of participants' experiences (a posteriori themes). A priori themes are reported in the current paper. We plan to report a posteriori themes in a follow-up paper. The seven stages of framework analysis [44] were followed: transcription, familiarisation, coding, developing a working analytical framework, applying the analytical framework, charting data into the framework matrix, and interpreting the data. Contextual notes written by the researcher at the time of the interview and excerpts from the researcher's reflective journal informed the analysis. As is common in a convergent mixed methods design [34] , we integrated quantitative and qualitative findings narratively using a contiguous approach. Table 2 outlines the sample's demographic and clinical characteristics. Figure 1 shows participant flow through the study, with details of study recruitment and retention. Of the 24 pregnant women approached by clinicians or identified via social media, 23 (96%) were enthusiastic about participating and one declined without giving a reason. Eight of the 23 could not then be contacted by the researcher. Therefore, the final study sample consisted of 15 mothers (63% of those approached), of whom 8 had partners who were willing to participate (62% of eligible partners). Of the five partners who declined to participate, four gave no reason and one reported they rarely heard their phone due to working with noisy machinery. All participants completed exit interviews and only two participants (9%) dropped out of the app use phase. Figure 2 shows percentage app completion across the sample during the app use period. On average, 67% of daily app-based EPDS assessments were completed. Therefore the study "accept" criterion was met (≥ 33% completed). Most participants (91%; 21/23) completed at least a third of daily app assessments and only slightly fewer (87%; 20/23) completed at least a half of daily app assessments. Therefore the study "target" criterion was met (50% of participants submitting 50% of data entries). Associations between baseline sociodemographic/clinical characteristics and percentage app completion are shown in Table 2 . Participant age was significantly correlated with percentage app completion, with older participants completing more daily assessments (albeit with only a moderate effect size). Participants with a self-reported history of depression completed a significantly lower percentage of app assessments (median 54% app completion, range 11%-81%) than those reporting no past depression (median 77.1%, range 31%-93%). Similarly, participants who had previously been prescribed psychiatric medication completed the app significantly less (median 58% app completion, range 11%-81%) than those who did not (median 78%, range 31-93%). In terms of app engagement over time in the study, participants completed the daily EPDS gradually less as the study progressed (OR = 0.98 per day of follow-up; p < 0.001; supplementary Fig. 2 ). Intra-class correlations between daily app-based and weekly paper-based EPDS total scores were high and statistically significant (Table 3) , indicating excellent agreement. Weighted kappa coefficients for individual EPDS item scores ranged from 0.5 and 1.0 (with two outliers of k = 0.25 and k = 0.00). Although all but the outliers were statistically significant, 95% confidence intervals were wide, likely due to the small sample size and low variability in individual item scores. Kappa coefficients for the final week's EPDS item scores were all higher than those for the same item in the initial week. This may be because there was greater between-participant variability in mood at 6 weeks postpartum (final week) compared to during pregnancy (initial week). App-based and paper-based EPDS showed perfect agreement in classifying participants as above or below threshold the commonly-used threshold for likely postnatal depression (total EPDS score ≥ 12). During the app use period, one Serious Adverse Event was recorded (hospitalisation for postpartum psychosis), and 4 minor adverse events (1 A&E trip; 3 stayed in maternity hospital for several days (but < 7 days) post birth). None of these adverse events were judged to be related to app use. Mean score across items for the abridged MARS was 4.1 (s.d. 0.5) out of a possible score of 5, indicating high overall acceptability/usability. One participant wrote: Responses to individual items (Fig. 3) suggested that, although the app was easy to use (mean 4.7, sd 0.5), the current version was not very interesting to use (mean 3.3, sd 1.1. Qualitative interview data reflected this and included suggestions for making future versions more engaging. A priori themes relating to app acceptability and specifications are described below, with illustrative quotations in Supplementary Table 1 . Participants considered the core idea of using an app for postnatal depression screening useful and acceptable, although those without symptoms found it less useful, personally. Others were reassured by knowing they would be contacted if their app responses caused concern. Only one person reported finding any aspect of the app worrying -having reported thoughts of self-harm that were passed on to the GP (per protocol), she felt worried about being a burden. Participants enjoyed personalisation options: changing the colour theme and background picture. Most considered the app sufficiently visually appealing, although five said it could be made more modern and colourful. Generally, participants found item content relevant, appropriate and acceptable. Three suggested expanding content to include questions about functioning and/or other perinatal mental health conditions (e.g. perinatal OCD/psychosis). Several suggested including a free text item allowing users to add details. Overall, item wording and response format was acceptable. Most participants considered items easy to answer, although two commented that the wording was more suited to responding weekly (as per original EPDS) than daily. A minority of participants expressed unease about specific EPDS item wording. E.g., three felt that items asking about feeling anxious "for no good reason" minimised their emotional experiences. Several suggested varying the order of questions or response options to reduce repetition. Others suggested varying question wording or rotating through a larger question pool. Most participants (18/23) said the 2-h response window was not long enough and sometimes prevented them from answering. They would prefer a 4-5 h window or to be allowed to answer any time. Prominent reasons for missing the response window were being busy with child-related tasks, or sleeping while the baby slept. Participants had found it easier to answer within the 2-h response window before their baby's birth. This emphasises the importance of designing digital tools to meet the needs of specific populations, in this case new parents. Having missed the limited time window, participants felt frustrated and even guilty, underscoring the need for a longer response window: a short response window is potentially counterproductive (making users feel worse). Participants said they responded less on busy days. They pointed out that, on these busy days, they could probably benefit most from taking time to reflect on their feelings. Similarly, only allowing participants to respond within a limited 2-h period may exaggerate underlying sampling biases ("non-ignorable non-response") caused by users being less likely to respond on busy days. Table 3 Comparison of daily app-reported EPDS (mean average of up to 7 days of data) with weekly paper EPDS for the initial week and the final week of the app use period a Two way mixed effects model, absolute agreement; calculated for total EPDS score (continuous) b Weighted Cohen's kappa, calculated for EPDS individual items (ordinal) c These extreme scores appear to be caused by the vary low variability in participant scores on this item (thoughts of self-harm); only one participant rated this item above zero on the app and/or the paper EPDS The app prompted participants at pseudo-random times each day (9am-7pm). Participants commended the decision to avoid notifications during early evening (typically a busy time for parents), although some would have preferred predictable prompts, ideally the same time each day. Eight commented on question frequency: five liked daily questions (aided recall and increased precision) and three found daily questions tedious. As a compromise, several suggested having daily questions initially, later reduced to weekly. Participants found the snooze feature useful but recommended changes its timing. A half an hour snooze was not long enough, and participants requested an extra reminder near the end of the response window. In line with quantitative findings (abridged MARS), all participants reported the questions were quick to complete (30 s to 2 min). Virtually all participants described the app as very easy to use and self-explanatory. Participants suggested changes to increase app engagement. Several commented that the user is "not getting much back from the app" at present. They were keen for the app to summarise the user's EPDS responses (e.g. graph or weekly report) and link them to information (e.g. NHS website) and support (e.g. therapist or peer support) based on their responses. Some suggested that adding more general parenting content (e.g. feeding timer) would increase the app's relevance and interest for parents. Finally, participants suggested ideas to increase the app's general usability, such as fixing technical glitches, providing a welcome message and back button, and considering gamifying the app. In a busy urban antenatal clinic, most (96%) eligible pregnant women approached were keen to try our newly developed postnatal depression screening app (ClinTouch DAWN-P). Use of the app from up to 4 weeks prenatally to 6 weeks postnatally in 15 mothers and 8 partners showed it to be easy to use and free of adverse effects. Participants were able to suggest modifications to the app and its deployment which would improve usability, such as extending the response window, adjusting question frequency over time, and including feedback and parenting advice. In all, 21 of the 23 participants continued to use the app for the full study period. A mean of 67% of daily app-based assessments were completed, with a history of depression predicting lower app usage. The validity of responses was confirmed by high agreement between app responses and the standard EPDS, both for total scores and individual items. App-based and paper-based ratings showed perfect agreement in identifying cases of likely PND using a standard screening threshold. In summary, we found this digital solution to be feasible, safe, acceptable and valid. It also benefits from being remotely delivered: we enrolled all participants remotely during the first COVID-19 lockdown. Use of digital screening could address known shortcomings of conventional health visitor-delivered screening such as limited staff time, parental unwillingness to disclose difficulties to a professional, lack of partner/ father screening, and language barriers. For example, translated versions of the EPDS can be made available as a menu within the app, broadening access. Operating procedures can be adapted to individual services and clinical pathways: some services use other screening scales (e.g., PHQ-9) and the timing of primary care referral pathways can vary locally. Further work is needed to show how larger-scale adoption of the app translates into longer-term clinical outcomes and to quantify cost savings. 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Innov Prim Care Personalised Postpartum Mental Healthcare (P3MH) Pilot RCT: Remote SBIRT Vs Achieving Integration in Mixed Methods Designs-Principles and Practices The English Indices of Deprivation Detecting Depression in Pregnancy: Validation of EPDS in British Pakistani Mothers The validity of the Arabic Edinburgh Postnatal Depression Scale Detecting postnatal depression in Chinese women: Validation of the Chinese version of the Edinburgh Postnatal Depression Scale Validation of the Edinburgh Postnatal Depression Scale in an Iranian sample Validation of the Bangla version of the Edinburgh Postnatal Depression Scale for a Bangladeshi sample Validation of a Romanian scale to detect antenatal depression Early signs Monitoring to Prevent relapse in psychosis and prOmote Wellbeing, Engagement and Recovery (EMPOWER): A feasibility cluster randomised controlled trial harnessing smartphone technology blended with peer support Mobile app rating scale: a new tool for assessing the quality of health mobile apps Using the framework method for the analysis of qualitative data in multi-disciplinary health research Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations We thank the study participants for taking part in the study, particularly during a potentially stressful and challenging time of their lives. 1 The online version contains supplementary material available at https:// doi. org/ 10. 1186/ s12884-022-04756-2.Additional file 1: Figure S1 . Example Edinburgh Postnatal Depression Scale item, as displayed by the ClinTouch DAWN-P app. Figure S2 . Patterns of app use over the study duration. Table S1 . a priori themes describing app acceptability and usability. All authors designed the study protocol, were involved in ongoing management and/or data analysis, and contributed to drafts of this report. As lead author, EE applied for ethical approval, collected and analysed study data and wrote the manuscript. CT and RA recruited study participants from clinical services and advised on clinical aspects of the study. CSP and PW oversaw software development and advised on technical aspects of the study. CT and SWL had overall senior managerial responsibility for study delivery. All authors provided critical revisions of the manuscript. Funding was provided by the UK Medical Research Council and Health Innovation Manchester (Mental Health and Women and Children research domains). However, they did not play a role in the study design, data collection, data analysis, data interpretation, writing of this particular report or in the decision to submit the article for publication. The datasets used and/or analysed during the current study available from the corresponding author on reasonable request. Ethics approval and consent to participate Ethical approval was obtained from Greater Manchester East Research Ethics Committee (19/NW/0763) and the study was registered (Clinicaltrials.gov: NCT04279093). All participants gave informed consent to take part in the study. All methods were performed in accordance with relevant guidelines and regulations. All participants consented for quotations to be published in an anonymous form. PW and SWL are directors of Affigo CIC, a not-for-profit community interest company designed to make digital health products available in the NHS and public sector.