Characteristics of PRSS catastrophising and coping groups split by quartiles
| PRSS catastrophising | PRSS coping | |||||||
|---|---|---|---|---|---|---|---|---|
| Lower quartile (0–0.4) | 25–50% (0.5–1.0) | 50–75% (1.1–1.7) | Upper quartile (1.8–4.1) | Lower quartile (0–2.3) | 25–50% (2.4–2.9) | 50–75% (3.0–3.4) | Upper quartile (3.5–4.8) | |
| n | 113 | 101 | 114 | 98 | 131 | 106 | 102 | 92 |
| Age in 2009 | 50.8 | 53.2 | 51.0 | 52.4 | 51.6 | 52.5 | 51.4 | 51.0 |
| Disease duration in 2009 | 16.0 | 16.4 | 16.0 | 15.8 | 16.6 | 15.9 | 15.6 | 15.7 |
| Coping | 2.8 | 2.9 | 2.9 | 2.7 | 1.6 | 2.6 | 3.2 | 3.9 |
| Catastrophising | 0.2 | 0.7 | 1.4 | 2.2 | 1.2 | 1.3 | 1.1 | 0.9 |
| SF-36-pfi | 73.3 | 65.5 | 59.3 | 51.6 | 62.8 | 57.0 | 63.9 | 66.5 |
| SF-12 PCS | 41.6 | 38.8 | 36.0 | 34.9 | 38.8 | 36.5 | 37.6 | 38.6 |
| SF-12 MCS | 52.2 | 49.2 | 43.6 | 40.0 | 44.5 | 43.1 | 48.3 | 49.8 |
| SLAQ score | 10.5 | 13.6 | 17.1 | 18.2 | 14.7 | 16.4 | 14.4 | 13.4 |
| VFS score | 17.9 | 24.2 | 30.6 | 34.4 | 27.9 | 29.1 | 25.9 | 22.0 |
| SLICC/ACR DI | 1.8 | 2.6 | 3.1 | 3.6 | 2.5 | 3.5 | 3.1 | 2.2 |
| Pain (last 7 days) | 2.6 | 3.4 | 4.3 | 5.1 | 3.8 | 4.2 | 3.8 | 3.3 |
Data are means illustrated separately for PRSS catastrophising and PRSS coping. Different levels of catastrophising resp. coping are represented in four quartiles.
n, number of cases; PRSS, Pain-Related Self Statements Scale; SF-12 MCS, SF-12 Mental Component Summary; SF-12 PCS, SF-12 Physical Component Summary; SF-36-pfi, 36-item short-form physical functioning index; SLAQ, Systemic Lupus Activity Questionnaire; SLICC/ACR DI: Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index; VFS, Vanderbilt Fatigue Score.