Relationship between pain patterns and PDC change
| Severe pain in the last 6 mo . | N . | Mean change in PDC (95% CLs) . | Pain interference on activities in the last 6 mo . | N . | Mean change in PDC (95% CLs) . | Frequency of pain episodes in the last 12 mo . | N . | Mean change in PDC (95% CLs) . |
|---|---|---|---|---|---|---|---|---|
| Never | 18 | 35.9 (22.9-49.0) | Never | 30 | 36.2 (26.4-46.0) | None | 32 | 29.0 (19.3-38.7) |
| Rarely | 61 | 15.7 (8.6-22.7) | Rarely | 63 | 14.1 (7.4-20.9) | 1 | 29 | 20.5 (10.3-30.7) |
| Sometimes | 89 | 15.2 (9.4-21.0) | Sometimes | 81 | 16.0 (10.0-21.9) | 2 | 38 | 14.2 (5.2-23.1) |
| Often | 54 | 13.4 (5.9-20.9) | Often | 48 | 10.6 (2.9-18.4) | 3 | 30 | 17.8 (7.7-27.9) |
| Always | 11 | 6.7 (−9.9 to 23.2) | Always | 11 | −2.6 (−18.7 to 13.6) | 4 or more | 104 | 11.7 (6.3-17.0) |
| Severe pain in the last 6 mo . | N . | Mean change in PDC (95% CLs) . | Pain interference on activities in the last 6 mo . | N . | Mean change in PDC (95% CLs) . | Frequency of pain episodes in the last 12 mo . | N . | Mean change in PDC (95% CLs) . |
|---|---|---|---|---|---|---|---|---|
| Never | 18 | 35.9 (22.9-49.0) | Never | 30 | 36.2 (26.4-46.0) | None | 32 | 29.0 (19.3-38.7) |
| Rarely | 61 | 15.7 (8.6-22.7) | Rarely | 63 | 14.1 (7.4-20.9) | 1 | 29 | 20.5 (10.3-30.7) |
| Sometimes | 89 | 15.2 (9.4-21.0) | Sometimes | 81 | 16.0 (10.0-21.9) | 2 | 38 | 14.2 (5.2-23.1) |
| Often | 54 | 13.4 (5.9-20.9) | Often | 48 | 10.6 (2.9-18.4) | 3 | 30 | 17.8 (7.7-27.9) |
| Always | 11 | 6.7 (−9.9 to 23.2) | Always | 11 | −2.6 (−18.7 to 13.6) | 4 or more | 104 | 11.7 (6.3-17.0) |
CL, confidence limits. Bold indicates significance at the P < 0.05 level.