Pain Variables
| Pain Effect | Result, N = 360 |
|---|---|
| Average pain level* (SD) | 6.8 (2.2) |
| Worst pain level* (SD) | 8.7 (5.3) |
| Duration of pain, years (SD) | 13.6 (13.1) |
| How often did you have back pain in the last 30 days? No. (%) | |
| Never | 2 (0.6) |
| Once or twice | 18 (5.0) |
| Several times per week | 101 (28.0) |
| Every day | 239 (66.4) |
| When you had pain in your back, how long did it last? No. (%) | |
| No pain | 2 (0.6) |
| Less than 60 minutes | 40 (11.2) |
| Two to several hours | 151 (42.3) |
| All day and night | 111 (31.1) |
| Days | 53 (14.8) |
| In the past 12 months, how often did you have a flare-up in your back pain, when it got extra painful? No. (%) | |
| Never | 15 (4.2) |
| 1 to 5 times | 69 (19.3) |
| 6 to 9 times | 57 (16.0) |
| 10 + times | 129 (36.2) |
| Constant and severe pain | 86 (24.2) |
| When your back pain flared up in the past 12 months (got extra painful), how did it affect your life? No. (%) | |
| Little effect | 19 (5.4) |
| Limited usual work | 70 (25.3) |
| Could not do work | 125 (35.5) |
| Could not move from bed | 72 (20.5) |
| Dependent on others | 66 (18.8) |
| How much does pain interfere with your normal work (including both housework and paid work)? No. (%) | |
| No effect | 14 (4.0) |
| Small effect | 28 (8.0) |
| Moderate effect | 93 (26.6) |
| Large effect | 123 (35.1) |
| Extreme effect | 92 (26.3) |
↵* Pain measured on a 1 to 10 scale.