Clinical variables related to disease burden in study participants. Data are presented as mean ± SD, unless otherwise stated
| Variable | AS (n=279) | nr-axSpA (n=102) | P value |
|---|---|---|---|
| BASDAI (0–100) | 33.2±21.8 | 39.5±23.1 | 0.014 |
| BASFI (0–100) | 30.5±24.1 | 29.4±24.6 | 0.711 |
| HAQ-S | 0.7±0.6 | 0.8±0.6 | 0.606 |
| SF36 PCS | 41.3±9.3 | 39.2±10 | 0.111 |
| SF36 MCS | 46.1±10.5 | 43.3±11.4 | 0.060 |
| ASqoL | 5.6±5.4 | 6.2±5.6 | 0.331 |
| Work productivity and impairment index (refers to the last week) | |||
| Absenteeism (%)* | 8.7±25.5 | 12.3±30.3 | 0.374 |
| Presenteeism (%)* | 33.8±25.0 | 37.1±25.9 | 0.401 |
| Overall work impairment (%)* | 33.4±29.7 | 36.6±32.9 | 0.476 |
| Daily activity impairment, (%) | 33.5±22.9 | 34.6±23.6 | 0.672 |
| Work productivity survey (refers to the last month) | |||
| Days of work missed* | 1.4±4.6 | 3.0±6.6 | 0.090 |
| Days with productivity at work reduced by ≥50%* | 2.6±6.3 | 4.6±8.2 | 0.090 |
| Rate of SpA interference on work productivity* | 3.2±2.3 | 3.8±2.6 | 0.109 |
| Days of household work missed | 2.5±5.6 | 4.8±7.6 | 0.010 |
| Days with household productivity reduced by ≥50% | 3.1±2.1 | 3.6±2.3 | 0.048 |
| Days with outside help | 2.7±6.5 | 2.8±5.9 | 0.815 |
| Rate of SpA interference with household work productivity (0-10 ) | 3.1±2.1 | 3.7±2.3 | 0.052 |
↵* Assessed in employed patients only.