Fremont 1987.

Methods	RCT
Participants	Community volunteers recruited via media Data on age and gender not available N = 61
Interventions	1. Group running (3 times a week, for 10 weeks, with a running coach in small groups of 6 ‐ 8 subjects) (n = 15) 2. Cognitive therapy (10 individual 1 hour sessions with a therapist) (n = 16) 3. Combined running and cognitive therapy (n = 18) 10 weeks
Outcomes	Beck Depression Inventory
Notes	Outcome assessment not blind Analysis not intention‐to‐treat
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No information available
Allocation concealment (selection bias)	High risk	Inadequate (as assessed by Lawlor and Hopker in the 2001 BMJ review)
Blinding (performance bias and detection bias) participants	Unclear risk	Not stated
Blinding (performance bias and detection bias) those delivering intervention	Unclear risk	Not stated
Blinding (performance bias and detection bias) outcome assessors	High risk	Self report BDI
Incomplete outcome data (attrition bias) All outcomes	High risk	Categorised as not intention‐to‐treat for the BMJ review (Lawlor and Hopkins). Data on drop‐outs not available to lead author
Selective reporting (reporting bias)	Unclear risk	Protocol not available for scrutiny. From the study report, it appears that all prespecified outcome measures have been reported
Other bias	Unclear risk	Unclear