Table 1. Demographics of subject groups at 6 months according to the Neck Disability Index (Vernon and Mior, 1996).
Group | N | Age (years)(mean ± SD) | Gender (% female) | BMI(mean ± SD) | NDI Classification | NDI (mean ± SD) | PDS(mean ± SD) | Total_ROM °(mean ± SD) |
Recovered | 17 | 28.8 (7.4) | 77.8 | 25.1 (4.5) | <8% | 3.1 (3.6) | 4.9 (7.5) | 181.4 (34.0) |
Mild | 15 | 36.7 (9.7) | 68.8 | 28.5 (5.6) | 10–28% | 17.4 (6.8) | 10.4 (8.7) | 158.2 (45.9) |
Moderate/Severe | 12 | 37.3 (9.2) | 76.9 | 27.8 (6.1) | >30 | 44.1 (7.1) | 17.6 (12.3) | 136.2 (30.8) |