Internet-based cognitive behavioural therapy (iCBT) for perinatal anxiety and depression versus treatment as usual: study protocol for two randomised controlled trials

BACKGROUND: We aimed to evaluate the acceptability and efficacy of two brief, Internet-delivered cognitive behavioural therapy interventions—MUMentum Pregnancy (study 1) and MUMentum Postnatal (study 2)—in reducing maternal symptoms of anxiety, depression and overall psychological distress compared to usual care in the perinatal period. METHODS/DESIGN: Women who are pregnant (study 1) or < 12 months postpartum (study 2) with current clinically elevated symptoms of anxiety and/or depression according to validated self-report measures, will be recruited via the research arm of a not-for-profit clinical and research unit in Australia and randomised to the intervention group or treatment as usual control group. The minimum sample size for each study (alpha 0.05; power 0.80 for a g of 0.80) was identified as 50 with at least 10% more to be recruited to account for expected attrition. The co-primary outcome measures are the Patient Health Questionnaire 9-item scale and Generalised Anxiety Disorder 7-item scale to measure depression and anxiety symptom severity, respectively, and will be administered at the following primary time-points: baseline; post treatment; and at one-month follow-up. Psychological distress will be measured according to the Kessler-10 psychological distress scale at each primary time-point and will also be completed before each lesson for those in the intervention group. The total trial period nine weeks for study 1 and 11 weeks for study 2. Program efficacy will be determined using intent-to-treat mixed models. Maintenance of gains will be assessed at one-month follow-up. DISCUSSION: The current randomised controlled trial seeks to extend the literature by evaluating the efficacy of a self-help intervention for women in the perinatal period. If efficacious, the MUMentum programs have the potential to be easily disseminated via https://thiswayup.org.au/ to large numbers of women across Australia as an intervention for women screening positive for anxiety, depressive or distress symptoms during pregnancy or postpartum. TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry, ACTRN12616000560493; ACTRN12616000559415. Registered on 2nd May 2016. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article 10.1186/s13063-017-2422-5) contains supplementary material, which is available to authorized users.