Table 3. Baseline characteristics.
| Baseline | RR or MD (95% CI) | I2 | P value for heterogeneity | P value overall |
|---|---|---|---|---|
| Age (years) | –0.78 (–1.64, 0.08) | 54 | 0.004 | 0.08 |
| BMI | –0.48 (–0.96, 0) | 33 | 0.16 | 0.05 |
| Males | 0.96 (0.90, 1.03) | 0 | 0.86 | 0.28 |
| NDI | –0.23 (–0.82, 0.35) | 0 | 0.59 | 0.43 |
| VAS (neck) | –0.01 (–0.21, 0.19) | 0 | 0.67 | 0.94 |
| VAS (arm) | 0.06 (–0.31, 0.43) | 0 | 0.92 | 0.75 |
| ROM F/E (sup) | 0.18 (–0.25, 0.62) | 39 | 0.11 | 0.41 |
| ROM F/E (inf) | –0.34 (–2.03, 1.35) | 91 | <0.00001 | 0.69 |
| ROM | –0.20 (–0.78, 0.37) | 76 | <0.00001 | 0.49 |
RR, relative risk; MD, mean difference; CI, confidence interval; VAS, visual analog scale; BMI, body mass index; NDI, neck disability index; Sup, superior segment; inf, inferior segment; ROM, range of motion; F/E, flexion/extension.