Table 2.
Self-reported pain scores and changes across indication subsets and reported pain duration by retained days.
| Pain Area | Lower back | Lower back | Lower back | Lower back | Lower back | Upper back | Upper back | Upper back | Upper back | Upper back |
| Pain duration | All | Acute | Subacute | Chronic | Not specified | All | Acute | Subacute | Chronic | Not specified |
| Initial, n (%) | 1278 (37) | 144 (4) | 107 (3) | 443 (13) | 584 (17) | 458 (13) | 74 (2) | 50 (1) | 170 (5) | 164 (5) |
| Initial, mean (SD) | 5.33 (1.98) | 4.47 (1.76) | 5 (1.54) | 5.37 (1.84) | 5.57 (2.13) | 5.19 (1.84) | 4.57 (1.76) | 4.96 (1.74) | 5.15 (1.73) | 5.57 (1.93) |
| Week 2, n (%) | 202 (36) | 30 (5) | 26 (5) | 120 (21) | 26 (5) | 81 (14) | 15 (3) | 15 (3) | 47 (8) | 4 (1) |
| Week 2, mean (SD) | 3.97 (2.04) | 3.23 (2.1) | 3.54 (1.73) | 4.2 (2.05) | 4.19 (2.02) | 3.65 (2.11) | 3.13 (2.53) | 4.27 (2.22) | 3.57 (1.93) | —a |
| Week 4, n (%) | 119 (36) | 16 (5) | 17 (5) | 69 (21) | 17 (5) | 46 (14) | 11 (3) | 4 (1) | 26 (8) | 5 (2) |
| Week 4, mean (SD) | 3.63 (2.38) | 2.19 (1.56) | 3.71 (1.99) | 4.12 (2.39) | 2.94 (2.77) | 2.91 (2.03) | 3.18 (1.89) | — | 2.81 (2) | — |
| Week 8, n (%) | 57 (39) | 10 (7) | 4 (3) | 39 (26) | 4 (3) | 17 (11) | 4 (3) | 2 (1) | 9 (6) | 2 (1) |
| Week 8, mean (SD) | 3.58 (2.41) | 2.6 (2.12) | — | 4 (2.52) | — | 3.65 (2.98) | — | — | 3 (2.4) | 9 (1.41) |
| Week 12, n (%) | 33 (39) | 5 (6) | 3 (4) | 23 (27) | 2 (2) | 9 (11) | 0 (0) | 0 (0) | 7 (8) | 2 (2) |
| Week 12, mean (SD) | 4.12 (2.63) | 2.8 (3.27) | — | 4.35 (2.62) | — | 3.67 (2.5) | — | — | 2.86 (2.04) | — |
| SMb test value | 1361.13 | 156.39 | 115.34 | 523.17 | 571.83 | 487.45 | — | — | 187.02 | 159.81 |
| SM degrees of freedom | 1271 | 143 | 106 | 439 | 580 | 457 | — | — | 169 | 163 |
| SM adjusted valuesc | 0.8 | 0.9 | 0.9 | 0.07 | 0.9 | 0.9 | — | — | 0.9 | 0.9 |
aNo sufficient data was available to calculate the statistics.
bSM: Skillings-Mack.
cThe adjusted P values were calculated using Bonferroni corrections.