Table 2.
Health-related quality of life in patients with axial spondyloarthritis at baseline and at 5-year follow-up assessed by SF-6D, 15D and SF-36
| Baseline Mean (SD) |
5-year follow-up | p value | Effect size | |
|---|---|---|---|---|
| SF-6D | 0.692 (0.119) | 0.710 (0.117) | 0.047 | 0.15 |
| 15D score | 0.854 (0.090) | 0.865 (0.138) | 0.166 | 0.12 |
| SF-36 PCS | 39.8 (9.6) | 41.9 (9.8) | 0.001 | 0.21 |
| SF-36 MCS | 48.8 (9.5) | 48.6 (9.6) | 0.754 | − 0.02 |
| SF-36 eight domains | ||||
| Bodily pain | 48.0 (20.5) | 54.3 (21.3) | < 0.001 | 0.31 |
| General health | 55.1 (21.3) | 57.5 (22.8) | 0.058 | 0.11 |
| Physical function | 74.2 (19.8) | 75.7 (22.1) | 0.003 | 0.08 |
| Physical role function | 44.7 (41.8) | 54.1 (43.5) | 0.229 | 0.22 |
| Mental health | 78.0 (13.3) | 78.5 (14.1) | 0.592 | 0.04 |
| Vitality | 48.5 (19.9) | 49.6 (22.0) | 0.405 | 0.06 |
| Social function | 76.3 (21.9) | 77.7 (21.9) | 0.274 | 0.06 |
| Emotional role function | 74.5 (38.6) | 75.4 (37.5) | 0.749 | 0.02 |
Paired sample t tests were used to compare baseline and 5-year follow-up
The scores for SF-6D range from 0.29 to 1.00, with 1.00 indicating ‘full health’ and those for 15D range from 0.0 (being dead) to 1.00 (no problems on any dimension). The score for SF-36 ranges from 0 to 100 where 100 indicates a high HRQOL
PCS physical component summary, MCS mental component summary