Table 2.
Cronbach’s alpha for the outcome measures
| Outcomes | Cronbach’s alpha | ||
|---|---|---|---|
| Total | NBO-group | Comparison group | |
| Timepoint 4 | |||
| EDPS | .79 | .78 | .80 |
| PSI – PD | .92 | .90 | .92 |
| PRFQ | |||
| PM | .37 | .32 | .39 |
| CMS | .74 | .75 | .73 |
| IC | .69 | .66 | .71 |
| MPAS | .81 | .81 | .82 |
| MCQ | .81 | .69 | .85 |
| Timepoint 5 | |||
| EPDS | .82 | .84 | .80 |
| PSI – PD | .92 | .91 | .93 |
| PSI – CD | .89 | .85 | .91 |
| PRFQ | |||
| PM | .41 | .31 | .50 |
| CMS | .82 | .80 | .83 |
| IC | .64 | .60 | .67 |
| MPAS | .82 | .81 | .83 |
EPDS Edinburgh Postnatal Depression Scale, PSI Parenting Stress Index, PD Parent domain, PRFQ Parental Reflective Functioning Questionnaire, PM Pre-Mentalizing, CMS Certainty about Mental States, IC Interest and Curiosity, MPAS Maternal Postnatal Attachment Scale, MCQ Maternal Confidence Questionnaire, CD Child domain