Table 4.
VAS scores for pain at baseline, 3, and 6 months by pain cohort
| No/mild pain | Explained pain | Unexplained pain | ||||
|---|---|---|---|---|---|---|
| n | Mean (95% CI) | n | Mean (95% CI) | n | Mean (95% CI) | |
| Overall paina | ||||||
| Baseline | 297 | 9.5 (8.4–10.6) | 65 | 62.3 (57.9–66.6) | 239 | 57.0 (54.8–59.2) |
| 3 months | 216 | 16.2 (13.3–19.1) | 46 | 46.0 (38.0–53.9) | 173 | 42.4 (38.4–46.4) |
| 6 months | 192 | 14.8 (12.2–17.4) | 43 | 48.0 (38.6–57.3) | 155 | 36.4 (31.6–41.2) |
| Interference with daily activitiesb | ||||||
| Baseline | 296 | 12.8 (10.5–15.0) | 65 | 60.7 (53.0–68.4) | 239 | 53.9 (50.2–57.6) |
| 3 months | 215 | 12.5 (9.7–15.2) | 46 | 45.6 (35.9–55.2) | 174 | 36.4 (31.8–41.1) |
| 6 months | 192 | 10.2 (7.8–12.7) | 43 | 44.1 (33.3–55.0) | 155 | 33.9 (28.5–39.3) |
No/mild pain was defined as an overall pain VAS ≤30 at baseline; both the explained and unexplained pain groups had an overall pain VAS >30 at baseline
CI confidence interval, VAS visual analog scale
aOverall pain severity was rated by patients on a 100 mm VAS in which 0 = no pain and 100 = pain as severe as I can imagine
bInterference of overall pain with ability to perform daily activities was rated by patients on a 100 mm VAS with 0 = not at all to 100 = complete