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Table 2 Relative and absolute reliability of measuring the talus-second metatarsal angle (T2MA)

From: A protocol for classifying normal- and flat-arched foot posture for research studies using clinical and radiographic measurements

  RELATIVE RELIABILITY ABSOLUTE RELIABILITY
  Type (3,1) ICC
(95% CI)
Systematic bias
(% mean difference)
Random error
(95% LoA)
Within-rater    
left feet (n = 51) 0.91 (0.85 – 0.95)* - 0.5° 7.1°
right feet (n = 51) 0.71 (0.55 – 0.83)* - 0.3° 12.2°
Between-rater    
left feet (n = 41) 0.78 (0.62 – 0.88)* - 1.0° 5.6°
right feet (n = 41) 0.68 (0.47 – 0.82)* 1.5° 7.1°
  1. *Significant at p < 0.05