Table 2.
Univariate mean score per group in primary and secondary outcomes in the imputed dataset without correction for clustering
| MEAN SCORE AT 2 WEEKS | Mean score at 12 weeks | mean score at 26 weeks | |||||||
|---|---|---|---|---|---|---|---|---|---|
| IV | CO | p-value | IV | CO | p-value | IV | CO | p-value | |
| Clinical parameters | |||||||||
| Disability (RMD) (0–24) |
4.1 (5.3) | 4.3 (4.8) | 0.789 | 2.1 (4.0) |
2.3 (3.7) | 0.720 | 2.0 (3.7) | 2.0 (3.6) | 0.949 |
| Pain (VAS) (0–100 mm) |
18.9 (21.7) | 20.3 (20.9) | 0.675 | 14.2 (22.6) | 12.4 (17.5) | 0.577 | 13.6 (17.3) | 16.3 (21.2) | 0.385 |
| Adequate relief (yes/no)† |
70 (81%) | 62 (81%) | 0.888 | 45 (69%) |
38 (62%) | 0.416 | 35 (66%) | 32 (64%) | 0.830 |
| Societal impact | |||||||||
| Absenteeism (days) | 1.47 (3.35) |
2.05 (4.03) |
0.359 | 0.93 (5.65) |
0.800 (3.63) |
0.888 | * | ||
| Absenteeism (yes/no)‡ |
18 (28%) |
20 (27%) |
0.924 | 3 (5%) |
4 (8%) |
0.552 | 7 (11%) | 6 (14%) | 0.650 |
| healthcare consumption | |||||||||
| Telephone consultations (per patient) |
0.35 (0.71) | 0.29 (0.60) | 0.556 | 1.18 (0.50) |
1.18 (0.51) | 0.672 | * | ||
| Practice consultations (per patient) |
0.21 (0.51) | 0.11 (0.39) | 0.134 | 1.12 (0.43) |
1.15 (0.52) |
0.965 | 1.11 (0.45) |
1.10 (0.38) |
0.914 |
RMD = Roland-Morris disability questionnaire (a higher score indicates a more favourable outcome). VAS = visual analogue scale (a lower score indicates a more favourable outcome). Mean score of low back pain, leg pain and both. IPQ = illness perception questionnaire. CO = control group. IV = intervention group. *Cannot be computed because the group is zero