Table 2

The performance of classifying wear and non-wear events for children versus adults

MethodCR (95% CI)Sensitivity (95% CI)Specificity (95% CI)PPV (95% CI)NPV (95% CI)
Children (5–16 years)
 The proposed CTA method0.96 (0.95 to 0.98)0.96 (0.93 to 0.99)0.94 (0.91 to 0.97)0.79 (0.70 to 0.89)0. 97 (0.93 to 1.00)
 The temperature alone0.73 (0.64 to 0.82)0.96 (0.93 to 0.99)0.64 (0.59 to 0.69)0.45 (0.24 to 0.67)0.97 (0.93 to 1.00)
 The acceleration alone0.79 (0.65 to 0.92)0.73 (0.55 to 0.92)0.89 (0.85 to 0.94)0.69 (0.60 to 0.79)0.75 (0.55 to 0.95)
Adults (≥17 years)
 The proposed CTA method0.93 (0.88 to 0.98)0.90 (0.82 to 0.99)0.88 (0.82 to 0.94)0.86 (0.78 to 0.93)0.92 (0.78 to 1.00)
 The temperature alone0.77 (0.64 to 0.9)0.90 (0.82 to 0.99)0.65 (0.55 to 0.75)0.63 (0.37 to 0.9)0.92 (0.79 to 1.00)
 The acceleration alone0.83 (0.70 to 0.96)0.80 (0.65 to 0.97)0.89 (0.79 to 0.99)0.83 (0.70 to 0.95)0.74 (0.51 to 0. 97)
  • CR, classification rate; CTA, combining temperature and acceleration; NPV, negative predictive value; PPV, positive predictive value.