a) | ||||
Neck Disability Index | % (number) CSI < 40 n = 94 | % (number) CSI > 40 n = 57 | p for individual groups comparisons | P for the whole model |
Minimal 0–4: no disability | 39 (41.5%) | 3 (5.3%) | < 0.0000 | P < 0.00000 |
mild 5–14: mild disability | 25 (26.6%) | 7 (12.3%) | < 0.03 | |
moderate 15–24: moderate disability | 26 (27.7%) | 27 (47.4%) | < 0.01 | |
severe disability: > 25 | 4 (4.3%) | 20 (35.1%) | < 0.0000 | |
b) | ||||
Oswestry Low Back Pain Questionnaire | % (number) CSI < 40 n = 94 | % (number) CSI > 40 n = 57 | p for groups comparisons | p for the whole model |
Minimal 0–20%: minimal disability | 23 (24.5%) | 3 (5.3%) | < 0.0024 | P < 0.00009 |
Moderate 21–40%: moderate disability | 43 (45.7%) | 18 (31.6%) | < 0.08 | |
Severe disability > 41% | 28 (29.8%) | 30 (52.6%) | < 0.005 |