Table 5.

Number (%) of hip OA cases and reference subjects without hip OA in the hip fracture cohort with risk factors for secondary osteoporosis

	Subjects with Hip OA (hip fracture and hip OA), n = 46	Reference subjects (hip fracture, but not hip OA), n = 92
Chronic obstructive pulmonary disease	8 (17%)	2 (2%)
Polymyalgica rheumatica	3 (7%)	7 (8%)
Steroid use due to other diseases	3 (7%)	0 (0%)
Coeliac disease	0 (0%)	1 (1%)
Gastrectomy (Billroth I)	5 (11%)	3 (3%)
Alcoholism	0 (0%)	1 (1%)
Renal failure	2 (4%)	0 (0%)
Hyperparathyroidism	0 (0%)	0 (0%)
Panhypopituitarism	0 (0%)	0 (0%)
At least one of the above	18 (39%)	12 (13%)