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Table 1 Measurement domains, survey tools, and collection time point

From: Evaluation of the impact of breastfeeding support groups in primary health centres in Andalusia, Spain: a study protocol for a cluster randomized controlled trial (GALMA project)

Variable Component Measurement tools/ Questions Baseline 2mth 4mth 6mth
Sociodemographic measures   Age, schooling level, marital status, employment, ethnicity.    
Clinical information Obstetric outcomes Type of birth, onset of labour, type of analgesia, perineal trauma, skin-to-skin technique    
Neonatal outcomes Gender, weight, Apgar, neonatology admission, health problem    
Breastfeeding measures Previous experience In affirmative case, interruption motivation    
Type of breastfeeding Exclusive breastfeeding, nearly exclusive breastfeeding, partial breastfeeding, formula
Breastfeeding information Breastfeeding observation form (BREAST)    
Breastfeeding Self-Efficacy Breastfeeding Self-Efficacy Scale-Short Form (BSES-SF)
Breastfeeding problems Type of problem and resolution (midwife, peer, social network, Internet …)
Breastfeeding Interruption - Motivation  
Behaviour measures Self-Efficacy General Scale
Social networks (intervention group) Use and frequency  
Problem consulted  
Clinical services Appointments related to breastfeeding attended