Data extraction and analysis
The following details of each study were extracted and described in the
summary table (table S2): first author, country, setting, (number of)
participants, (duration of the) intervention, control condition,
maternal mental health outcome and retention and compliance rates. The
retention rate is calculated as the percentage of women who remained
till the latest follow-up and the compliance rate as the percentage of
women who attended all sessions of all women allocated to the
intervention group. Birth, neonatal and infant outcomes are described in
another table (table S3).
The collaborative care criteria (CCC) and the collaborative care score
(CCS) of each study are summarized in table 1. The CCC are defined as
follows19:
- A multi-professional approach to patientcare: Care provided
by a midwife or gynaecologist and at least one other health care
professional (e.g., psychiatrist, psychologist, social worker,
psychiatric nurse)
- Structured management plan: Evidence based management plan
according to the NICE or Marcé guideline or national guideline derived
from these20,21
- Scheduled patient follow-ups: One or more telephone or
in-person follow-up appointments are scheduled during or after
treatment to provide specific interventions, facilitate treatment
adherence, or monitor symptoms or adverse effects (e.g., calls between
sessions, evaluation of treatment goals, follow-up or booster
sessions). Monitoring symptoms for research purposes was insufficient
to meet this criterion. Also, active outreach for women who missed
sessions and providing telephone sessions for women who missed a
session was insufficient
- Enhanced interprofessional communication: Team meetings,
case-conferences, individual consultation/supervision, shared medical
records, patient-specific written or verbal feedback between
caregivers. Communication to check whether all involved therapists
work according to the same instructions was not scored
We contacted authors for additional information on CCC, when certain
information was missing or unclear (n=13, 3 replies). The CCS is the
total number of criteria met by an intervention. In table 2 we described
the relation between the CCS and the effect of the intervention on
maternal mental health. The effect of the intervention was cited as
positive (+) when maternal mental health was significantly better in (a
part of) the intervention group compared to the control group at> 1 follow-up moment. The score was +/- when there
was not a significant difference between both groups and negative (-)
when the maternal mental health was significantly worse in the
intervention group compared to the control group.