BReastfeeding Attitude and Volume Optimization (BRAVO) trial: study protocol for a randomized controlled trial

Table 2 Baseline characteristics of the parents and of the child’s birth

Baseline parental characteristics	Unit	Source
Postal code and contact address		Questionnaire
Age	Years	Questionnaire
Marital status	Give response classes?	Questionnaire
Pre-pregnancy weight	kg	Questionnaire
Number of (and age of) other children	N, years	Questionnaire
Substance use (smoking, alcohol, etc.)	Yes/no	Questionnaire
Substance use (smoking, alcohol, etc.)	Number/day?	Questionnaire
Socioeconomic status (highest education of father/mother)	Give response classes?	Questionnaire
Occupational status (mother/father)	Give response classes?	Questionnaire
Nutrition during gestation		Questionnaire
Family history of chronic disease ((chronic) lung disease, diabetes mellitus, cardiovascular disease)		Questionnaire
Maternal and paternal disease history. ((chronic) lung disease, diabetes mellitus, cardiovascular disease)		Questionnaire
Children’s birth characteristics
Gestational age in weeks	Weeks	Midwife registry
Birth weight in grams	Grams	Midwife registry
Birth length in centimeters	Centimeters	Midwife registry
1-minute and 5-minute Apgar scores	Values	Midwife registry
Specifics of gestation: (pre-)eclampsia, diabetes mellitus		Midwife registry
Specifics of delivery: caesarian section, breech position, and vacuum/forceps extraction		Midwife registry
Specifics of neonatal morbidity: Neonatal Intensive Care Unit (NICU)/special nursery care requirements, including sepsis, respiratory distress, and hyperbilirubinemia		Midwife registry

ISSN: 1745-6215