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Table 2 Data extraction categories for eligible studies

From: Recruitment and retention of fathers with young children in early childhood health intervention research: a systematic review and meta-analysis protocol

Category Data extracted
Study characteristics First author, year, country, study design
Participant Eligibility criteria (including different levels in recruitment/sampling plan), demographics, data collection setting
Intervention characteristics Content, delivery method, unit of delivery, deliverer, setting, exposure quantity and duration, time span, effect size of intervention
Assignment method Unit of assignment
Method used to assign units to study conditions, including details of any restriction
Inclusion of aspects employed to help minimize potential bias comparison condition induced due to non-randomization
Participant flow Flow of participants: enrollment, assignment, allocation and intervention exposure, baseline and outcome measures, follow-up
Recruitment Method of recruitment, sampling method, recruitment setting
Retention Method to increase compliance or adherence