Table 1. Descriptive information.
| Variable A | MPI sub-group | ||||||
|---|---|---|---|---|---|---|---|
| Adaptive coper | Interpersonally distressed | Dysfunctional | |||||
|
MC n = 48 |
Control n = 45 |
MC n = 33 |
Control n = 29 |
MC n = 49 |
Control n = 48 |
||
| Age at study start, mean (SD) | 44.8 (10.4) | 43.6 (12.6) | 43.8 (10.1) | 41.3 (12.8) | 41.7 (12.6) | 45.8 (11.5) | |
| Female, % (n) | 61.7 (29) | 62.8 (27) | 65.6 (21) | 63.0 (17) | 59.6 (28) | 56.5 (26) | |
| Type of work, % (n) | Physically heavy | 6.7 (3) | 6.7 (3) | 12.1 (4) | 24.1 (7) | 16.3 (8) | 16.7 (8) |
| Intermittent heavy/light | 37.8 (17) | 37.8 (17) | 30.3 (10) | 24.1 (7) | 44.9 (22) | 37.5 (18) | |
| Walking/standing | 20.0 (9) | 20.0 (9) | 42.4 (14) | 27.6 (8) | 32.6 (16) | 43.7 (21) | |
| Sitting | 62.5 (25) | 62.5 (25) | 54.5 (18) | 44.8 (13) | 38.8 (19) | 35.4 (17) | |
| Pain in the thigh and lower leg, % (n) | 25.0 (12) | 13.3 (6) | 33.3 (11) | 27.6 (8) | 18.4 (9) | 20.8 (10) | |
| Pain in the neck and/or thoracic spine, % (n) | 60.4 (29) | 71.1 (32) | 75.8 (25) | 79.3 (23) | 85.7 (42) | 70.8 (34) | |
| Pain intensity, 0–10, mean (SD) | 1st visit | 4.3 (1.8) | 4.3 (1.8) | 6.1 (2.0) | 5.7 (1.7) | 5.8 (1.7) | 6.2 (1.7) |
| 4th visit | 1.7 (1.3) | 1.7 (1.3) | 2.8 (1.6) | 2.2 (1.2) | 2.0 (1.1) | 2.3 (1.8) | |
| Study start | 1.3 (1.1) | 1.3 (1.1) | 2.2 (1.4) | 2.3 (1.4) | 2.0 (1.1) | 2.3 (1.8) | |
| EQ-5D score (study start) 0–1, mean (SD) | 0.81 (0.03) | 0.79 (0.11) | 0.59 (0.24) | 0.67 (0.22) | 0.59 (0.24) | 0.67 (0.19) | |
| RMDQ Score (study start), mean (SD) | 3.0 (3.0) | 3.1 (4.3) | 6.0 (3.9) | 4.1 (3.0) | 6.1 (4.3) | 5.2 (3.5) | |
| Number of treatments during initial period, mean (SD) | 5.4 (2.6) | 6.2 (2.8) | 5.7 (1.8) | 6.5 (2.5) | 6.4 (2.6) | 6.4 (3.0) | |
A, No imputation has been made for missing data, mean values and percentages are based on true responses for each variable; MPI, West Haven-Yale multidimensional pain inventory; MC, maintenance care; SD, standard deviation; n, number of subjects; RMDQ, Roland Morris disability questionnaire.