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CONSORT 2010 checklist of information to include when reporting a randomised trial.

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Cost-effectiveness planes of the sensitivity analyses.

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Flowchart of study participants.

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Cost-effectiveness plane reflecting the probability that blended ACT is cost-effective compared to CBT in terms of treatment responders.

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Cost-effectiveness plane reflecting the probability that blended ACT is cost-effective compared to CBT in terms of QALYs (cost-utility).

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Acceptability curve reflecting the probability that blended ACT is cost-effective compared to CBT in terms of QALYs (cost-utility) at different willingness-to-pay ceilings.

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Baseline characteristics of study sample.

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Mean costs and outcomes by condition over assessments.

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Result of the main analyses (cost-effectiveness and cost-utility) and sensitivity analyses.

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Maternal self-reported symptoms.