Table 4.

Distribution of all fractures by cause among Olmsted County, Minnesota women and men following their new diagnosis of RA made between 1955–2007, and or equivalent index date for matched non-RA subjects, stratified by age at RA diagnosis/index date; only fractures occurring over their follow-up, which ended at the earlier follow-up of the matched pair, are considered.

			Fracture Cause
			Severe Trauma	Falls from Standing	Spontaneous	Pathological	Uncertain	All Causes
Sex and Age Groups	Subjects	N	N (%)*	N (%)*	N (%)*	N (%)*	N (%)*	N
Women ≥ 50 years	RA	514	83 (16%)	191 (36%)	190 (36%)	21 (4%)	49 (9%)	534
	Non-RA	514	60 (17%)	132 (37%)	127 (36%)	13 (4%)	23 (6%)	355
Women < 50 years	RA	308	62 (22%)	67 (24%)	124 (44%)	0 (0%)	28 (10%)	281
	Non-RA	308	47 (44%)	29 (27%)	23 (21%)	1 (1%)	8 (7%)	108
Women < 50 years**	RA	308	20 (25%)	11 (14%)	33 (42%)	0 (0%)	15 (19%)	79
	Non-RA	308	21 (51%)	12 (29%)	4 (10%)	0 (0%)	4 (10%)	41
Men ≥ 50 years	RA	239	45 (24%)	55 (29%)	68 (36%)	5 (3%)	14 (7%)	187
	Non-RA	239	14 (15%)	29 (31%)	31 (33%)	5 (5%)	14 (15%)	93
Men < 50 years	RA	110	15 (25%)	12 (20%)	30 (49%)	1 (2%)	3 (5%)	61
	Non-RA	110	32 (57%)	4 (7%)	16 (29%)	1 (2%)	3 (5%)	56
Men < 50 years**	RA	110	8 (50%)	2 (12%)	5 (31%)	1 (6%)	0 (0%)	16
	Non-RA	110	20 (71%)	3 (11%)	4 (14%)	0 (0%)	1 (4%)	28

^*Percentage (%) of each type of fracture

^**Follow-up ended at age ≤ 50 years