Table 4 Criterion validity of the iPhone compared to the CROM
iPhone (Mean ± SD) | CROM (Mean ± SD) | ICC ± [95% CI] | Pearson’s r (p-value) | |
|---|---|---|---|---|
Flexion | 56.0° ± 8.3° | 57.1° ± 8.4° | 0.76 [0.55-0.88] | 0.69 p < 0.001 |
Extension | 82.2° ± 14.0° | 85.5° ± 12.3° | 0.58 [0.27-0.78] | 0.56 p = 0.002 |
Right lateral flexion | 45.6° ± 7.8° | 44.7° ± 8.2° | 0.85 [0.70-0.93] | 0.80 p < 0.001 |
Left lateral flexion | 47.5° ± 6.8° | 47.2° ± 7.0° | 0.70 [0.46-0.85] | 0.63 p < 0.001 |
Right rotation | 72.4° ± 14.5° | 73.8° ± 8.6° | 0.55 [0.23-0.76] | 0.58 P < 0.01 |
Left rotation | 75.4° ± 14.7° | 74.9° ± 8.6° | 0.43 [0.08-0.69] | 0.38 p = 0.04 |