Table 5 Likelihood ratios of the positive (LR+) and negative test result (LR-) of two prediction rulesa in subgroups of the imputed original database and in the full record database (95%CI).
During influenza epidemic | Pre/post an influenza epidemic | |||||
|---|---|---|---|---|---|---|
Prediction rulea | n | LR+ | LR- | LR+ | LR- | |
Full record analysis | 1 | 3738 | 3.65 (1.76 to 5.54) | 0.23 (0.08 to 0.37) | 1.23 (0.34 to 2.11) | 0.04 (0.01 to 0.06) |
2 | 2.24 (1.95 to 2.54) | 0.27 (0.12 to 0.41) | 0.43 (0.33 to 0.54) | 0.05 (0.02 to 0.08) | ||
Influenza A | 1 | 4176 | 3.43 (2.69 to 4.18) | 0.30 (0.20 to 0.40) | 1.46 (1.05 to 1.87) | 0.05 (0.03 to 0.06 |
2 | 2.21 (2.06 to 2.36) | 0.33 (0.26 to 0.41) | 0.46 (0.40 to 0.51) | 0.07 (0.05 to 0.09) | ||
Influenza B | 1 | 2566 | 5.05 (3.75 to 6.36) | 0.13 (0.07 to 0.19) | 1.16 (0.64 to 1.68) | 0.01 (0.00 to 0.02) |
2 | 4.01 (3.68 to 4.33) | 0.34 (0.20 to 0.48) | 0.49 (0.37 to 0.61) | 0.04 (0.02 to 0.07) | ||
Influenza year (2002 - 2003) | 1 | 584 | 3.73 (0.63 to 6.83) | 0.13 (0.00 to 0.32) | 1.79 (0.19 to 3.39) | 0.06 (0.00 to 0.13) |
2 | 2.28 (1.72 to 2.83) | 0.22 (0.00 to 0.45) | 1.08 (0.84 to 1.32) | 0.10 (0.01 to 0.19) | ||
Influenza year (2003 - 2004) | 1 | 1064 | 4.00 (0.49 to 7.51) | 0.13 (0.04 to 0.21) | 1.72 (0.00 to 4.10) | 0.02 (0.01 to 0.03) |
2 | 2.19 (1.87 to 2.51) | 0.25 (0.15 to 0.36) | 0.36 (0.24 to 0.47) | 0.04 (0.02 to 0.06) | ||
Influenza year (2004 - 2005) | 1 | 995 | 3.93 (2.07 to 5.78) | 0.32 (0.13 to 0.51) | 3.03 (1.64 to 4.42) | 0.07 (0.03 to 0.10) |
2 | 2.52 (2.16 to 2.88) | 0.42 (0.23 to 0.62) | 0.79 (0.65 to 0.93) | 0.13 (0.07 to 0.19) | ||
Influenza year (2005 - 2006) | 1 | 785 | 2.90 (1.03 to 4.77) | 0.40 (0.05 to 0.74) | 0.65 (0.28 to 1.02) | 0.06 (0.02 to 0.11) |
2 | 2.90 (2.47 to 3.33) | 0.61 (0.29 to 0.92) | 0.50 (0.40 to 0.60) | 0.10 (0.06 to 0.15) | ||
Influenza year (2006 - 2007) | 1 | 1156 | 2.04 (1.19 to 2.90) | 0.33 (0.09 to 0.57) | 1.07 (0.39 to 1.75) | 0.04 (0.01 to 0.08) |
2 | 1.79 (1.59 to 2.00) | 0.24 (0.13 to 0.35) | 0.38 (0.27 to 0.50) | 0.05 (0.02 to 0.08) | ||
Age < 5 years | 1 | 267 | 2.70 (0.00 to 6.02) | 0.06 (0.00 to 0.82) | 0.69 (0.00 to 2.24) | 0.01 (0.00 to 0.11) |
2 | 1.58 (1.10 to 2.05) | 0.12 (0.00 to 1.12) | 0.25 (0.08 to 0.42) | 0.02 (0.00 to 0.17) | ||
Age 5 to 14 years | 1 | 931 | 3.57 (1.08 to 6.07) | 0.14 (0.00 to 0.27) | 1.43 (0.25 to 2.61) | 0.03 (0.00 to 0.05) |
2 | 1.91 (1.65 to 2.16) | 0.22 (0.02 to 0.42) | 0.44 (0.32 to 0.56) | 0.05 (0.00 to 0.10) | ||
Age 15 to 64 years | 1 | 3137 | 3.77 (2.69 to 4.85) | 0.31 (0.22 to 0.41) | 1.71 (1.09 to 2.34) | 0.05 (0.03 to 0.07) |
2 | 2.29 (2.10 to 2.48) | 0.32 (0.24 to 0.41) | 0.48 (0.42 to 0.54) | 0.07 (0.05 to 0.09) | ||
Age > 64 years | 1 | 249 | 5.31 (0.00 to 20.43) | 0.39 (0.00 to 1.01) | 0.67 (0.00 to 2.91) | 0.14 (0.00 to 0.29) |
2 | 1.68 (0.91 to 2.44) | 0.24 (0.00 to 0.73) | 0.46 (0.26 to 0.66) | 0.07 (0.00 to 0.16) | ||