Table 3 Intra-rater and inter-rater reliability and criterion validity of Smartphone measurement
From: Validity and reliability of arm abduction angle measured on smartphone: a cross-sectional study
| Intra-rater reliability ICC 2,1 (95%CI), P value | Inter-rater reliability ICC 2,1 (95%CI), P value | Criterion validity (Pearson r, P value) | |
|---|---|---|---|
| Healthy group (n = 14) | 0.780 (0.399, 0.931) | 0.492 (0.083, 0.822) | 0.400, p = 0.198 ns |
| p = 0.001** | p = 0.04* | ||
| Pathologic group (n = 23) | 0.975 (0.942, 0.989) | 0.990 (0.978, 0.996) | 0.971, p < 0.001** |
| p < 0.001** | p < 0.001** | ||
| Total simple (n = 37) | 0.988 (0.977, 0.994) | 0.994 (0.988, 0.997) | 0.964, p < 0.001** |
| p < 0.001** | p < 0.001** |