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Table 1 Estimated diagnostic performances of the infrared thermoscanners in predicting hyperthermia measured by the axillary temperature

From: Fever screening during the influenza (H1N1-2009) pandemic at Narita International Airport, Japan

  Cut-off level of axillary temperature
All subjects (n = 1,049) 37.5°C 38.0°C 38.5°C
Positive fraction 51.9 (48.8, 54.9) 37.0 (34.1, 39.9) 23.5 (21.0, 26.1)
Sensitivity 58.3 (54.1, 62.4) 50.8 (45.8, 55.7) 70.4 (64.8, 76.1)
Specificity 70.5 (66.5, 74.5) 81.7 (78.7, 84.6) 63.6 (60.3, 66.9)
Positive predictive value 68.0 (64.7, 71.3) 61.9 (57.5, 66.4) 37.3 (34.5, 40.2)
Negative predictive value 61.1 (58.3, 63.8) 73.9 (71.8, 75.9) 87.5 (85.3, 89.7)
AUCunadj 70.5 (67.7, 73.2) 72.4 (69.6, 75.0) 73.1 (70.4, 75.7)
AUCadj 74.0 (71.3, 76.6) 75.2 (72.4, 77.7) 75.9 (73.2, 78.4)
Self-reporting (n = 285)    
Positive fraction 46.3 (43.3, 49.3) 46.3 (43.3, 49.3) 21.4 (18.9, 23.9)
Sensitivity 75.8 (68.4, 83.1) 81.1 (74.4, 87.7) 73.8 (62.7, 84.8)
Specificity 71.9 (64.8, 79.0) 65.3 (57.7, 72.8) 78.1 (72.7, 83.5)
Positive predictive value 69.9 (64.2, 75.6 66.8 (61.7, 72.0) 47.9 (40.7, 55.1)
Negative predictive value 77.5 (71.9, 83.0) 80.0 (74.0, 85.9) 91.6 (88.3, 94.9)
AUCunadj 79.5 (74.4, 83.7) 78.3 (73.1, 82.7) 82.9 (78.1, 86.8)
AUCadj 78.8 (73.7, 83.1) 75.0 (69.7, 79.7) 74.0 (68.6, 78.7)
  1. All the values are expressed as percentages. Proportion of subjects whose axillary temperature was above the specified cut-off level; AUCunadj, area under the receiver operating characteristic curve without adjustment for age; AUCadj, age-adjusted estimate of the area under the receiver operating characteristic curve. Values in parentheses are the 95% confidence intervals.