Table 1. Characteristics of Olmsted County, Minnesota residents with incident mixed connective tissue disease in 1985-2014.

	Female (N=42)	Male (N=8)	Total (N=50)
Age at fulfillment of criteria, years (SD)	47.9 (16.2)	49.2 (13.8)	48.1(15.7)
Race, n (%)
White	38 (90%)	6 (75%)	44 (88%)
African-American	0 (0%)	1 (13%)	1 (2%)
Asian	4 (10%)	0 (0%)	4 (8%)
Other	0 (0%)	1 (13%)	1 (2%)
Median length of follow-up, years, median (interquartile range)	10.0 (4.9, 14.3)	1.6 (1.1, 4.2)	8.3 (3.4, 14.1)
Time from first symptoms to fulfillment of criteria, years, median (interquartile range)	3.6 (1.0, 10.3)	3.8 (1.8, 5.2)	3.6 (1.0, 10.0)

Abbreviations: SD=standard deviation