Laine 1999.

Methods	Retrospective cohort
Participants	6820 subjects Age range 13‐60 73% male 27% female
Interventions	HOURS OF SERVICE a) Evening or weekend clinic hours b) On‐call phone access
Outcomes	HEALTHCARE UTILIZATION: Hospitalization rates ‐ % hospitalized a) Evening or weekend clinic hours: 45% vs. 53% (AOR = 0.77; CI .63‐.93) b) On‐call phone access 49% vs. 45%
Notes	Case management not described
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	D ‐ Not used