Table 2.
Pre-RA Cases (n=87) | Controls (n=87) | ||
---|---|---|---|
Matching factors at blood draw | |||
Age, mean (±SD) | 54.9 (8.3) | 54.8 (±8.2) | |
Postmenopausal, (%) | 55 (63) | 55 (63) | |
Postmenopausal hormone use at blood draw, (%) | 33 (60) | 33 (60) | |
Other Characteristics | p* | ||
Caucasian, (%) | 87 (100.0) | 85 (97.7) | 0.50 |
Ever cigarette smokers, (%) | 48 (55.2) | 50 (57.5) | 0.87 |
Pack-years among smokers, mean (±SD) | 19.9 (14.6) | 23.3 (21.1) | 0.84 |
Age at menarche < 12 years, (%) | 16 (18.6) | 16 (18.4) | 1.0 |
Parous, (%) | 83 (95.4) | 82 (95.4) | 0.75 |
Alcohol intake in gms/day, mean (±SD) | 3.6 (3.4) | 5.0 (5.6) | 0.94 |
Body mass index in kg/m2, mean (±SD) | 26.2 (4.8) | 26.1 (5.1) | 0.62 |
p value from Fisher’s exact tests for categorical variables and t-tests for continuous variables.