Table 1.
Participants' characteristics at baseline
| Characteristics | Responders (n = 132) | Non-responders (n = 284) | P-Values |
|---|---|---|---|
| Sex: male, n (%) | 78/132 (59.1) | 177/284 (62.3) | 0.529 |
| Ethnicity: white, n (%) | 127/129 (98.4) | 274/277 (98.9) | 0.691 |
| Employed: yes, n (%) | 112/126 (88.9) | 240/261 (92.0) | 0.325 |
| Age, years | |||
| n | 132 | 284 | <0.001 |
| Mean (SD) | 43.0 (9.4) | 39.2 (10.3) | |
| KQoL-26 (0-100, 100 = best health): | |||
| Physical functioning | |||
| N | 131 | 283 | 0.962 |
| Mean (SD) | 59.3 (19.4) | 59.2 (19.2) | |
| Activity limitations | |||
| N | 130 | 283 | 0.374 |
| Mean (SD) | 52.9 (25.1) | 50.5 (25.2) | |
| Emotional functioning | |||
| N | 131 | 284 | 0.019 |
| Mean (SD) | 45.7(22.1) | 40.4 (21.1) | |
| SF-36 (mean = 50, SD = 10, 100 = best health):a | |||
| Physical component | |||
| N | 129 | 267 | 0.088 |
| Mean (SD) | 40.0 (8.3) | 38.4 (8.8) | |
| Mental component | |||
| N | 129 | 267 | 0.388 |
| Mean (SD) | 49.1 (10.9) | 48.0 (11.4) | |
| EQ-5D (0-1, 1 = best health) | |||
| N | 131 | 283 | 0.064 |
| Mean (SD) | 0.62 (0.23) | 0.57 (0.27) | |
a The SF-36 physical and mental health summary scales use norm-based scoring; 50 (SD = 10) is the general United States population mean