Table 2.

Data extraction categories for eligible studies

Category	Data extracted
Study characteristics	First author, year, and country
Participant	Eligibility criteria (including different levels in recruitment/sampling plan), demographics, and data collection setting
Intervention characteristics	Content, delivery method, unit of delivery, deliverer, setting, exposure quantity and duration, and time span
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 nonrandomization
Participant flow	Flow of participants: enrollment, assignment, allocation and intervention exposure, baseline and outcome measures, and follow-up
Recruitment	Method of recruitment, sampling method, and recruitment setting
Retention	Method to increase compliance or adherence
Outcomes	Stress, anxiety, depression, quality of life, relationship satisfaction/quality, social support, and improved psychological well-being