Table 1.

Patient demographics

	n	%
Sex
Male	56,532	39
Female	88,805	61
Age (years)
0–49	5,182	4
50–59	16,182	11
60–75	74,950	52
> 75	49,025	34
Primary diagnosis
Primary OA	110,438	76
Inflammatory disease	5,397	4
Fracture	18,832	13
Pediatric hip disease	2,073	1
Idiopathic femoral head necrosis	4,430	3
Secondary posttraumatic OA	371	0.3
Others		1