| PMC full text: | Published online 2013 Dec 11. doi: 10.1136/bmjopen-2013-003838
|
Table 3
Characteristics of cluster membership at 7-year baseline follow-up, groups 1 and 2 (n=155)
| Cluster (trajectory) from 7-year follow-up analysis | |||||
|---|---|---|---|---|---|
| No or occasional pain | Persistent mild pain | Fluctuating pain | Persistent severe pain | p Value | |
| In cluster (%) | 31 | 37 | 11 | 21 | |
| Age (years) | 46.3 (43.9 to 48.6) | 47.7 (45.5 to 50.0) | 46.3 (42.1 to 50.6) | 47.0 (43.7 to 50.2) | 0.85 |
| Female | 65% (51 to 80) | 63% (50 to 77) | 68% (43 to 93) | 63% (45 to 81) | 0.99 |
| Pain intensity | 0.8 (0 to 1.8) | 2.3 (1.8 to 2.8) | 4.9 (3.6 to 6.3) | 6.7 (5.8 to 7.6) | <0.001 |
| Leg pain | 42% (26 to 58) | 51% (37 to 65) | 78% (54 to 100) | 83% (68 to 98) | 0.009 |
| Upper body pain | 52% (36 to 68) | 71% (58 to 84) | 88% (71 to 100) | 93% (84 to 100) | 0.004 |
| Disability | 2.0 (0 to 4.1) | 4.3 (3.0 to 5.6) | 8.7 (5.7 to 11.7) | 12.9 (10.5 to 15.3) | <0.001 |
| Anxiety | 5.3 (4.1 to 6.4) | 6.8 (5.6 to 8.0) | 6.5 (4.4 to 8.6) | 8.8 (7.3 to 10.3) | 0.005 |
| Depression | 2.8 (1.8 to 3.8) | 4.9 (3.8 to 6.0) | 4.3 (2.8 to 5.8) | 7.4 (5.9 to 8.8) | <0.001 |
| PHQ-15 | 3.9 (2.6 to 5.3) | 5.0 (3.9 to 6.1) | 7.4 (4.3 to 10.4) | 7.7 (5.8 to 9.7) | 0.006 |
| Insomnia | 27% (12 to 42) | 42% (28 to 57) | 75% (51 to 98) | 80% (65 to 96) | <0.001 |