| Variables | Instrument |
---|---|---|
Proximate indicators of ‘supportive care during labour’ | Attendance of midwives | Time documentation tool |
Workload of midwives | ||
Outpatient care | ||
Supportive procedures by midwives | Birth documentation tool | |
Attendance of a midwifery student | Time documentation tool | |
Attendance of an obstetrician | ||
Shift changes | ||
Satisfaction with the presence of midwives | Postal questionnaire eight weeks postpartum | |
Partner support helpful | Postal questionnaire eight weeks postpartum | |
 | (three scales from BBCI) | |
Midwife-led care | Birth documentation tool | |
Hospital | Time documentation tool | |
Admission during daytime | Time documentation tool | |
 | Birth during daytime | Time documentation tool |
Parturient-specific variables | Parity | Hospital-based information system |
Length of stay | Time documentation tool | |
Epidurals and analgesia | Birth documentation tool | |
Induction of labour | ||
Oxytocin usage | ||
Newborn weight | Hospital-based information system | |
 | Childbirth preparation class | Postal questionnaire postpartum |
Socio-demographic variables | Health insurance | Hospital-based information system |
Age | ||
Income | Willingness-to-pay questionnaire in pregnancy | |
Education | ||
 | Partnership |  |