Table 2

Subgroup analysis for total fracture based on country, DM types, sex and study design

Factors	Subsets	RR and 95% CI	P value	I² (%)	P value for heterogeneity	Ratio of RR between subgroups	P value for ratios of RR
Country	Western	1.32 (1.17 to 1.50)	<0.001	97.4	<0.001	1.07 (0.76–1.52)	0.690
Country	Eastern	1.23 (0.89 to 1.70)	0.214	–	–	1.07 (0.76–1.52)	0.690
DM types	I	1.51 (1.35 to 1.68)	<0.001	78.3	<0.001	1.24 (1.08–1.41)	0.002
DM types	II	1.22 (1.13 to 1.31)	<0.001	83.0	<0.001	1.24 (1.08–1.41)	0.002
Sex	Men	1.49 (1.20 to 1.85)	<0.001	96.1	<0.001	1.14 (0.89–1.46)	0.313
Sex	Women	1.31 (1.16 to 1.49)	<0.001	92.8	<0.001	1.14 (0.89–1.46)	0.313
Study design	Prospective	1.32 (1.20 to 1.46)	<0.001	83.4	<0.001	1.01 (0.84–1.21)	0.936
Study design	Retrospective	1.31 (1.12 to 1.54)	0.001	97.6	<0.001	1.01 (0.84–1.21)	0.936