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. Author manuscript; available in PMC: 2014 Sep 13.
Published in final edited form as: Biomass Bioenergy. 2012 Dec;47:459–468. doi: 10.1016/j.biombioe.2012.09.003

Table 2.

Performance of specific stove temperature threshold values to identify the daily use diagnosed with the peak algorithm.

ROC curve Performance of specific thresholds
Area 95% C.I. Accuracya Sensitivityb Specificityc
Daily parameter T0
 Range 0.990 (0.989, 0.992) 11 °C 0.95 0.95 0.96
 Maximum 0.989 (0.987, 0.991) 26 °C 0.96 0.95 0.97
 Mean 0.980 (0.977, 0.983) 19 °C 0.95 0.95 0.93
 Coefficient of variation 0.959 (0.956, 0.962) 17% 0.90 0.90 0.90
 Minimum 0.869 (0.861, 0.877) 16 °C 0.72 0.70 0.92
a

Accuracy = Sensitivity × (% use days detected with algorithm) + Specificity (% non-use days detected with algorithm).

b

Sensitivity = (number of days detected as in-use by both the algorithm and the T0)/(number of days detected as in-use by the algorithm).

c

Specificity = (number of days detected as non-use by both the algorithm and the T0)/(number of days detected as non-use by the algorithm).