Table 2.

Results of subgroup analyses

Subgroup analyses		Number of included studies	SMD [95% CI]	P value	Heterogeneity (I2, P value)
Analyses based on studies only involving Type 2 diabetes patients	Overall analysis	3 [19,24,25]	–0.34 [–0.50, –0.17]	<0.0001	28%, P=0.24
	Post-intervention outcomes	2 [24,25]	–0.53 [–0.82, –0.24]	0.0004	46%, P=0.16
	Outcomes after 12 months follow up	2 [19,25]	–0.43 [–0.81, –0.04]	0.03	62%, P=0.07
Analyses based on studies in which depression was evaluated using CES-D	Overall analysis	3 [17–19]	–0.21 [–0.56, 0.13]	0.23	52%, P=0.12
	Post-intervention outcomes	1 [18]	0.02 [–0.45, 0.50]	0.92	-
	Outcomes after 12 months follow up	2 [17,19]	–0.32 [–0.81, 0.17]	0.20	67%, P=0.08

-, no application.