Table 3

The performance of classifying wear and non-wear events for females versus males

MethodCR (95% CI)Sensitivity (95% CI)Specificity (95% CI)PPV (95% CI)NPV (95% CI)
Females
 The proposed CTA method0.95 (0.92 to 0.98)0.92 (0.86 to 0.99)0.91 (0.86 to 0.96)0.80 (0.70 to 0.89)0.96 (0.91 to 1.00)
 The temperature alone0.76 (0.61 to 0.84)0.92 (0.85 to 0.99)0.62 (0.54 to 0.70)0.49 (0.23 to 0.75)0.96 (0.91 to 1.00)
 The acceleration alone0.85 (0.72 to 0.99)0.87 (0.70 to 1.00)0.89 (0.80 to 0.98)0.75 (0.62 to 0.88)0.82 (0.59 to 1.00)
Males
 The proposed CTA method0.94 (0.90 to 0.98)0.95 (0.90 to 1.00)0.91 (0.87 to 0.96)0.84 (0.75 to 0.92)0.94 (0.84 to 1.00)
 The temperature alone0.76 (0.67 to 0.86)0.95 (0.91 to 1.00)0.66 (0.60 to 0.72)0.55 (0.33 to 0.78)0.94 (0.84 to 1.00)
 The acceleration alone0.76 (0.63 to 0.89)0.68 (0.50 to 0.85)0.89 (0.84 to 0.95)0.74 (0.64 to 0.85)0.69 (0.49 to 0.89)
  • CR, classification rate; CTA, combining temperature and acceleration; NPV, negative predictive value; PPV, positive predictive value.