Comparison 3. Attitudes.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
3.1 Attitudes (RCT/CRCT)—short‐term follow‐up	5	683	Std. Mean Difference (IV, Random, 95% CI)	0.59 [0.24, 0.94]
3.1.1 Short duration—face‐to‐face	1	392	Std. Mean Difference (IV, Random, 95% CI)	0.78 [0.58, 0.99]
3.1.2 Self‐paced—online	1	62	Std. Mean Difference (IV, Random, 95% CI)	1.23 [0.69, 1.78]
3.1.3 Long duration—online	2	198	Std. Mean Difference (IV, Random, 95% CI)	0.33 [0.05, 0.61]
3.1.4 Long duration—face‐to‐face	1	31	Std. Mean Difference (IV, Random, 95% CI)	0.03 [‐0.68, 0.73]