Comparison 6. Effects of school‐based asthma interventions vs usual care subgrouped by explicit use of theory.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Exacerbations leading to emergency department (ED) visits	13		Odds Ratio (Random, 95% CI)	0.70 [0.53, 0.92]
1.1 Theoretical framework utilised explicitly	10		Odds Ratio (Random, 95% CI)	0.75 [0.54, 1.04]
1.2 Use of theory not explicit	3		Odds Ratio (Random, 95% CI)	0.56 [0.33, 0.97]
2 Absence from school	10		Std. Mean Difference (Random, 95% CI)	‐0.07 [‐0.22, 0.08]
2.1 Theoretical framework utilised explicitly	6		Std. Mean Difference (Random, 95% CI)	‐0.19 [‐0.35, ‐0.03]
2.2 Use of theory not explicit	4		Std. Mean Difference (Random, 95% CI)	0.08 [‐0.05, 0.20]
3 Withdrawal from the study	13		Odds Ratio (Random, 95% CI)	1.14 [0.92, 1.43]
3.1 Theoretical framework utilised explicitly	12		Odds Ratio (Random, 95% CI)	1.22 [0.97, 1.54]
3.2 Use of theory not explicit	1		Odds Ratio (Random, 95% CI)	0.61 [0.30, 1.26]