Table 2.

Meta-analysis for hip/vertebral fractures by study design and geographic region

Subgroup	No. of studies	Summary OR	95 % CI	Heterogeneity
				Q	P	I 2 (%)
Hip fracture
Geographic area
Asia	2	1.790	1.729–1.854	0.63	0.428	0.0
Europe	5	1.308	1.084–1.579	1.68	0.794	0.0
North America	5	1.197	0.973–1.473	14.49	0.006	72.4
Study design
Cohort	10	1.304	1.072–1.586	74.7	0.000	87.9
Cross-sectional	2	1.007	0.330–3.075	0.35	0.556	0.0
Vertebral fracture
Geographic area
Asia	2	1.140	0.753–1.727	1.73	0.189	42.1
Europe	3	1.139	0.439–2.958	2.92	0.233	31.4
North America	2	1.084	0.765–1.536	2.31	0.128	56.7
Study design
Cohort	3	1.058	0.818–1.369	3.19	0.202	37.4
Cross-sectional	4	1.315	0.889–1.944	3.11	0.376	3.4

P—P for heterogeneity