Table 1. Participants’ characteristics.
| Variables | Group with organ damage | Control group | t | P | ||
|---|---|---|---|---|---|---|
| mean | SD | mean | SD | |||
| Age (years) | 47.9 | 8.7 | 40.8 | 8.5 | 3.464 | 0.001 |
| Disease duration (years) | 12.1 | 8.6 | 7.3 | 4.8 | 2.617 | 0.011 |
| Age at disease onset (years) | 35.9 | 9.9 | 33.5 | 7.9 | 1.056 | 0.294 |
| Time elapsed until diagnosis (months) | 14.2 | 16.5 | 11.5 | 12.5 | 0.725 | 0.471 |
| Age at diagnosis (years) | 37.0 | 10.1 | 34.3 | 8.1 | 1.155 | 0.252 |
| SLEDAI | 11.8 | 6.6 | 9.0 | 7.8 | 1.655 | 0.102 |
| Physician’s global assessment | 1.5 | 0.8 | 1.1 | 1.0 | 1.824 | 0.072 |
| SF-36 physical health score | 30.6 | 24.5 | 40.8 | 25.6 | 2.773 | 0.008 |
| SF-36 mental health score | 43.7 | 25.8 | 58.5 | 25.5 | 2.417 | 0.018 |
| SF-36 global health score | 35.0 | 22.8 | 51.2 | 24.5 | 2.895 | 0.005 |
| Fatigue (FSS) | 6.0 | 1.4 | 5.4 | 1.6 | 1.889 | 0.062 |
SD = standard deviation; SLEDAI = systemic lupus erythematosus disease activity index; SF-36 = medical outcome survey short form 36; FSS = fatigue severity scale.