Characteristic | Control (n = 20) | RA (n = 24) | p-value |
---|---|---|---|
Age, years | 56 (46, 60) | 57 (50, 61) | 0.77 |
Female sex (%) | 17 (85) | 21 (88) | > 0.99 |
Race (%) | 0.81 | ||
White | 17 (85) | 21 (88) | |
Black or African American | 3 (15) | 2 (8) | |
More than one race | 0 (0) | 1 (4) | |
Smoking status (%) | 0.26 | ||
Never smoked | 16 (80) | 13 (54) | |
Past smoker | 2 (10) | 6 (25) | |
Current smoker | 2 (10) | 5 (21) | |
Co-morbidities | |||
Dyslipidemia (%) | 1 (5) | 7 (29) | 0.05 |
Systemic hypertension (%) | 0 (0) | 6 (25) | 0.03 |
COPD/emphysema (%) | 0 (0) | 1 (4) | > 0.99 |
Anthropometrics | |||
BMI, kg/m2 | 26.1 (23.3, 30.8) | 28.5 (24.7, 30.1) | 0.36 |
Waist-to-hip ratio | 0.85 (0.82, 0.90) | 0.89 (0.85, 0.93) | 0.10 |
Fat-free mass index (kg/m2) | 15.6 (14.9, 17.3) | 16.4 (15.5, 17.6) | 0.51 |
Fat mass index (kg/m2) | 9.8 (7.2, 12.0) | 11.4 (8.8, 13.2) | 0.31 |
Physical activity measures | |||
IPAQ, total MET-minutes/week | 4810 (2210, 13,150) | 1598 (1043, 4984) | < 0.01 |
IPAQ Moderate intensity MET-min/week | 2055 (120, 4,178) | 1155 (409, 2632) | 0.35 |
IPAQ Vigorous intensity MET-min/week | 1080 (0, 3,420) | 0 (0, 0) | < 0.01 |
Accelerometer (n = 19, 22) | |||
MET Rate (kcals hourly equivalent) | 1.11 (1.07, 1.19) | 1.05 (1.02, 1.07) | < 0.01 |
Total activity count/day (in millions) | 1.41 (0.88, 1.83) | 0.93 (0.73, 1.16) | 0.06 |
MVPA/day | 121 (87, 149) | 94 (43, 114) | 0.03 |
Step counts/day | 10,499 (8354, 13,429) | 5394 (3721, 8748) | < 0.01 |
Serum C-reactive protein mg/L (n = 20,21) | 1.34 (0.75, 2.69) | 1.11 (0.54, 1.55) | 0.33 |
Matsuda index | 7.17 (5.83, 7.75) | 3.95 (2.33, 5.64) | 0.02 |