Table 2. Subgroup analyses for 25(OH)D and hip fracture.

	No. of reports	Relative Risk (95CI%)	P for heterogeneity	I2	P for test
Sex
Male	5	1.86 (1.36 to 2.56)	0.695	0.0	0.000
Female	6	1.45 (1.20 to 1.75)	0.181	34.1	0.000
Age
≥65 years	10	1.61 (1.41 to 1.84)	0.110	37.3	0.000
≥42years	5	1.49 (1.19 to 1.85)	0.722	0	0.000
Location
Europe	5	1.64 (1.37 to 1.97)	0.096	49.2	0.000
USA	8	1.56 (1.34 to 1.80)	0.355	9.7	0.000
Study type
Cohort	11	1.67 (1.45 to 1.93)	0.277	17.5	0.000
Case-cohort	4	1.42 (1.17 to 1.72)	0.418	0.0	0.000
Duration of follow-up
<7 years	7	1.89 (1.52 to 2.35)	0.271	20.8	0.000
≥7 years	6	1.48 (1.29 to 1.69)	0.575	0.0	0.000