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. 2011 Jun 16;6(6):e21194. doi: 10.1371/journal.pone.0021194

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)