Table 2.

Incidences of subtrochanteric and pertrochanteric fractures

Diagnosis	Sex	Age	Mean incidence per 100,000 ± standard deviation
Pertrochanteric fractures	Combined	All ages	80.08 ± 6.34
		< 60	6.46 ± 0.32
		61–70	51.71 ± 2.97
		71–80	175.52 ± 9.79
		81–90	770.67 ± 50.43
		> 90	1871.54 ± 144.33
	Male	All ages	46.38 ± 6.08
		< 60	8.58 ± 0.53
		61–70	52.62 ± 3.08
		71–80	132.94 ± 9.90
		81–90	476.32 ± 24.54
		> 90	1215.16 ± 218.27
	Female	All ages	112.61 ± 6.83
		< 60	4.27 ± 0.15
		61–70	50.85 ± 3.20
		71–80	210.42 ± 12.64
		81–90	933.57 ± 59.24
		> 90	2082.37 ± 133.57
Subtrochanteric fractures	Combined	All ages	14.53 ± 1.50
		< 60	2.15 ± 0.12
		61–70	11.64 ± 0.73
		71–80	34.32 ± 2.53
		81–90	126.06 ± 5.55
		> 90	265.37 ± 32.58
	Male	all ages	9.01 ± 1.14
		< 60	2.86 ± 0.25
		61–70	11.12 ± 0.85
		71–80	24.87 ± 2.52
		81–90	74.25 ± 6.53
		> 90	159.35 ± 41.89
	Female	all ages	19.86 ± 1.89
		< 60	1.41 ± 0.06
		61–70	12.12 ± 0.78
		71–80	42.07 ± 2.82
		81–90	154.98 ± 7.95
		> 90	299.31 ± 31.61