Symptoms. signs and context | Sensitivity (95% CI) | Specificity (95% CI) | LR+ (95% CI) | Cumulative b LR+ (95% CI) | LR- (95% CI) | Cumulative b LR- (95% CI) |
---|---|---|---|---|---|---|
Influenza epidemic | 0.88 (0.86 to 0.89) | 0.42 (0.39 to 0.44) | 1.50 (1.43 to 1.57) | 0.30 (0.26 to 0.33) | ||
During an epidemic | 1.50 (1.43 to 1.57) | 1.50 (1.43 to 1.57) | ||||
Prediction rule 1 | ||||||
+ILI contact | 0.42 (0.38 to 0.46) | 0.63 (0.58 to 0.68) | 1.12 (1.01 to 1.24) | 1.68 (1.49 to 1.88) | 0.93 (0.87 to 0.98) | 1.38 (1.28 to 1.49) |
+cough | 0.81 (0.79 to 0.84) | 0.40 (0.36 to 0.44) | 1.35 (1.29 to 1.40) | 2.27 (2.01 to 2.53) | 0.47 (0.42 to 0.52) | 0.65 (0.56 to 0.74) |
+expectoration day1 | 0.10 (0.00 to 0.40) | 0.93 (0.67 to 1.00) | 1.30 (1.08 to 1.53) | 2.96 (2.38 to 3.54) | 0.93 (0.86 to 1.00) | 0.54 (0.40 to 0.68) |
+body temp > 37.8°C | 0.90 (0.87 to 0.92) | 0.21 (0.16 to 0.26) | 1.13 (1.08 to 1.19) | 3.35 (2.67 to 4.03) | 0.49 (0.41 to 0.58) | 0.26 (0.18 to 0.34) |
Prediction rule 2 | ||||||
+ cough | 0.82 (0.81 to 0.84) | 0.39 (0.36 to 0.42) | 1.34 (1.29 to 1.39) | 2.01 (1.90 to 2.13) | 0.46 (0.41 to 0.51) | 0.69 (0.60 to 0.78) |
+body temp > 37.8°C | 0.91 (0.89 to 0.92) | 0.19 (0.16 to 0.22) | 1.12 (1.08 to 1.16) | 2.26 (2.11 to 2.40) | 0.49 (0.40 to 0.58) | 0.34 (0.27 to 0.41) |
Pre/post an epidemic | 0.30 (0.26 to 0.33) | 0.30 (0.26 to 0.33) | ||||
Prediction rule 1 | ||||||
+ ILI contact | 0.42 (0.36 to 0.47) | 0.82 (0.80 to 0.85) | 2.36 (1.93 to 2.79) | 0.69 (0.54 to 0.85) | 0.71 (0.64 to 0.78) | 0.21 (0.18 to 0.24) |
+cough | 0.81 (0.78 to 0.85) | 0.40 (0.34 to 0.46) | 1.35 (1.28 to 1.42) | 0.93 (0.73 to 1.14) | 0.47 (0.41 to 0.53) | 0.11 (0.09 to 0.13) |
+expectoration day1 | 0.11 (0.00 to 0.42) | 0.92 (0.65 to 1.00) | 1.30 (1.08 to 1.53) | 1.21 (0.89 to 1.54) | 0.93 (0.85 to 1.00) | 0.09 (0.06 to 0.11) |
+body temp > 37.8°C | 0.92 (0.88 to 0.95) | 0.17 (0.11 to 0.23) | 1.11 (1.05 to 1.16) | 1.34 (0.97 to 1.72) | 0.48 (0.39 to 0.57) | 0.04 (0.03 to 0.05) |
Prediction rule 2 | ||||||
+cough | 0.78 (0.76 to 0.81) | 0.45 (0.42 to 0.48) | 1.42 (1.37 to 1.47) | 0.42 (0.38 to 0.47) | 0.49 (0.43 to 0.54) | 0.14 (0.12 to 0.17) |
+body temp > 37.8°C | 0.93 (0.91 to 0.95) | 0.15 (0.12 to 0.17) | 1.09 (1.06 to 1.12) | 0.46 (0.41 to 0.51) | 0.48 (0.39 to 0.57) | 0.07 (0.05 to 0.08) |