Table 2.
Comparison of visceral fat-related variables between patients with RA and the control group, before and after propensity score matching
| Sex | Variables | Before matching | After matching* | ||||
|---|---|---|---|---|---|---|---|
| RA patients | Controls | p value† | RA patients | Controls | p value† | ||
| Women | n | 292 | 482 | 226 | 226 | ||
| Age, years | 61.4 ± 12.2 | 53.9 ± 11.7 | < 0.001 | 58.7 ± 11.8 | 58.7 ± 11.8 | 0.959 | |
| Body Mass Index, kg/m2 | 22.3 ± 3.7 | 23.0 ± 3.4 | 0.012 | 22.6 ± 3.8 | 22.6 ± 3.0 | 0.925 | |
| WC, cm | 83.3 ± 10.2 | 82.0 ± 9.1 | 0.074 | 82.9 ± 0.6 | 82.9 ± 0.6 | 0.976 | |
| VFA, cm2 | 56.0 ± 28.1 | 53.1 ± 27.0 | 0.145 | 55.3 ± 29.0 | 53.8 ± 23.7 | 0.538 | |
| V/S ratio | 0.40 ± 0.18 | 0.33 ± 0.15 | < 0.001 | 0.39 ± 0.18 | 0.34 ± 0.13 | 0.002 | |
| VFA ≥ 100 cm2, n (%) | 25 (8.6) | 23 (4.8) | 0.034 | 19 (8.4) | 7 (3.1) | 0.015 | |
| SFA, cm2 | 152.5 ± 72.9 | 173.1 ± 70.4 | < 0.001 | 156.3 ± 75.2 | 168.6 ± 65.9 | 0.064 | |
| Man | n | 60 | 1045 | 59 | 59 | ||
| Age, years | 63.8 ± 10.6 | 52.7 ± 10.9 | < 0.001 | 64.5 ± 9.1 | 64.3 ± 9.4 | 0.905 | |
| Body Mass Index | 24.2 ± 3.2 | 24.2 ± 2.9 | 0.998 | 24.3 ± 3.0 | 24.7 ± 3.2 | 0.481 | |
| WC, cm | 88.1 ± 1.0 | 86.3 ± 0.3 | 0.084 | 88.6 ± 8.4 | 89.7 ± 7.6 | 0.459 | |
| VFA, cm2 | 90.3 ± 37.5 | 79.0 ± 34.5 | 0.015 | 91.7 ± 36.4 | 89.8 ± 35.0 | 0.778 | |
| V/S ratio | 0.57 ± 0.17 | 0.48 ± 0.16 | < 0.001 | 0.58 ± 0.16 | 0.51 ± 0.13 | 0.013 | |
| VFA ≥ 100 cm2, n (%) | 23 (38.3) | 232 (22.2) | 0.004 | 23 (39.0) | 22 (37.3) | 0.850 | |
| SFA, cm2 | 158.2 ± 53.9 | 163.1 ± 53.9 | 0.450 | 159.7 ± 53.1 | 174.4 ± 54.5 | 0.139 | |
Values are shown as mean ± SD or number (percentage)
WC waist circumference, VFA visceral fat area, V/S visceral fat area/subcutaneous area, SFA subcutaneous fat area
*The matching ratio is 1:1 with adjusting for age, Body Mass Index and waist circumference
† t test for continuous variables and Chi-squared test for categorical variables