No of studies	Design	Risk of bias	Inconsistency	Indirectness	Imprecision	Other	Certainty (overall score)
Outcome: quality of care: healthcare professional adherence to EBP
2	Cluster randomised trials	Serious Downgraded 1 level due to serious risk of bias; lack of blinding of personnel in both trials; outcome assessors not blinded and incomplete outcome data in 1 trial.	None CIs overlap and I2 = 0	Not serious Adherence to EBP measured using file audit in both studies	Serious Downgraded 1 level due to serious imprecision; 95% CIs wide.	Not serious No serious concerns regarding publication bias	⊕⊕⊝⊝ Low
Outcome: patient adherence to recommended treatment: number of outdoor journeys at 6 months
1	Cluster randomised trial	Not serious Low risk of bias	None	None	Serious Downgraded 1 level due to suboptimal information size (1 study with 100 participants) and 95% CIs wide.	Not serious No serious concerns regarding publication bias	⊕⊕⊕⊝ Moderate
Outcome:measures of patient health status and well‐being: quality of Life (EQ‐5D) at up to 6 months
2	Cluster randomised trials	Not serious Low risk of bias	Not serious	Not serious	None	Not serious No serious concerns regarding publication bias	⊕⊕⊕⊕ High
Outcome:measures of patient health status and well‐being: patient psychological well‐being at up to 6 months
2	Cluster randomised trials	Not serious Low risk of bias	Not serious	Serious Downgraded 1 level due to outcome dissimilarity.	None	Not serious No serious concerns regarding publication bias	⊕⊕⊕⊝ Moderate
CI: confidence interval; EBP: evidence‐based practice; EQ‐5D: European Quality of Life‐5 Dimensions.