. Author manuscript; available in PMC: 2014 Oct 1.

Published in final edited form as: J Rheumatol. 2013 Aug 15;40(10):1669–1676. doi: 10.3899/jrheum.121493

Table 1.

Characteristics of all Olmsted County, Minnesota, women and men with incident rheumatoid arthritis between 1955 and 2007, and by age at diagnosis (≥50 years and <50 years).

	Women			Men
	All	≥50 years	<50 years	All	≥50 years	<50 years
N	822	514	308	349	239	110
Mean Age (yrs) [at diagnosis]	56 ± 16	66 ± 10	40 ± 8	58 ± 14	65 ± 9	41 ± 7
Rheumatoid Factor Positive [ever]	523 (64%)	325 (63%)	198 (64%)	235 (67%)	148 (62%)	87 (79%)
Rheumatoid Nodules [ever]	261 (32%)	157 (31%)	104 (34%)	130 (37%)	75 (31%)	55 (50%)
Erosions/Destructive Disease [ever]	447 (54%)	290 (56%)	157 (51%)	176 (50%)	112 (47%)	64 (58%)
Oral Glucocorticoids [ever]	542 (66%)	317 (62%)	225 (73%)	252 (72%)	167 (70%)	85 (77%)

Continuous variables are summarized as mean ± SD; categorical variables are summarized as N (%).