Demographic Data
| Demographic variable | Category | No. of patients (%) |
|---|---|---|
| Sex (n = 368) | M | 172 (46.7) |
| F | 196 (53.3) | |
| Age (n = 368) | 20s | 19 (5.2) |
| 30s | 66 (17.9) | |
| 40s | 76 (20.7) | |
| 50s | 83 (22.6) | |
| 60s | 66 (17.9) | |
| 70s | 41 (11.1) | |
| ≥ 80 | 17 (4.6) | |
| Disease (n = 345, excluding 23 non-respondents) | Spinal or joint pain | 166 (48.1) |
| Complex regional pain syndrome | 76 (22.0) | |
| Postherpetic neuralgia | 40 (11.6) | |
| Fibromyalgia | 31 (9.0) | |
| Peripheral neuropathy | 26 (7.5) | |
| Cancer pain | 6 (1.8) | |
| Period of treatment (n = 366, excluding 2 non-respondents) | < 6 mo | 99 (27.0) |
| 6 mo ≤, < 1 yr | 48 (13.1) | |
| 1 yr ≤, < 3 yr | 76 (20.8) | |
| 3 yr ≤, < 5 yr | 63 (17.2) | |
| 5 yr ≥ | 80 (21.9) |