Table 1. Baseline characteristics of the subjects.

Values are presented as mean±standard deviation or number (%). BMI was calculated as weight in kilograms divided by height in meters squared.

RA, rheumatoid arthritis; BMI, body mass index; MET, metabolic equivalent.

_*From a T-test for continuous outcomes and chi-square test for binary outcomes comparing a difference between any of the 2 study groups. ^†Categorical variable from the International Physical Activity Questionnaire Research Committee: low, no activity is reported or some activity is reported but not enough to meet categories 2 or 3; moderate, either of the following 3 criteria (3 or more days of vigorous activity of at least 20 minutes per day; 5 or more days of moderate-intensity activity and/or walking of at least 30 minutes per day; 5 or more days of any combination of walking, moderate-intensity, or vigorous intensity activities achieving a minimum of at least 600 MET-minutes/wk); high, any one of the following 2 criteria (vigorous-intensity activity on at least 3 days and accumulating at least 1,500 MET-minutes/wk; 7 or more days of any combination of walking, moderate- or vigorous-intensity activities accumulating at least 3,000 MET-minutes/wk). ^‡None<1, light 1–14.99, moderate 15–29.99, and heavy ≥30 g/d.