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Table 1 Validity data for the self-reporting line drawing instruments

From: Development and validation of self-reported line drawings for assessment of knee malalignment and foot rotation: a cross-sectional comparative study

  Sensitivity (95%CI) Specificity (95%CI) Likelihood ratio (95%CI) Accuracy (95%CI)
Knee     
Varus 0.80 (0.45, 1.15) 0.98 (0.95, 1.02) 45.60 (6.22, 334.11) 0.97 (0.92, 1.01)
Valgus 0.71 (0.48, 0.95) 0.96 (0.92, 1.01) 20.00 (4.93, 81.16) 0.91 (0.85, 0.98)
Overall 0.74 (0.54, 0.93) 0.97 (0.94, 1.00) 21.31 (-15.81, 58.44) 0.95 (0.91, 0.99)
Foot     
Inwards 0.75 (0.33, 1.17) 0.98 (0.93, 1.02) 33.00 (4.38, 248.40) 0.96 (0.90, 1.02)
Outwards 0.93 (0.84, 1.02) 0.92 (0.84, 0.99) 10.97 (4.27, 28.14) 0.92 (0.86, 0.98)
Overall 0.92 (0.83, 1.01) 0.96 (0.93, 1.00) 11.18 (-0.70, 23.06) 0.94 (0.90, 0.98)
  1. CI - confidence interval