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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**
  1. Ns = No significative
  2. * = p < 0.05
  3. ** = p < 0.01