Study	Gender	Number	Number of fractures	Incidence rate per 100,000 p.y	95% CI
Zebaze et al (2003)	Male	81,320	14	17.24	(9.42 – 28.92)
	Female	93,825	21	22.39	(13.00 – 32.10)
	Total	175,145	35	19.99	(13.92 – 27.80)
Ekezie et al (2011)	Male	17,220	12	10	(5.68 – 17.61)
	Female	21,371	26	17.38	(11.83 – 25.53)
	Total	38,591	38	14.07	(10.24 – 19.82)
Adebajo et al (1991)	Male	385,200	3	0.79	(0.16 – 2.28)
	Female	361,500	2	0.55	(0.07 – 2.0)
	Total	746,700	5	0.67	(0.22 – 1.56)