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Table 3 Multivariable predicators of a diagnosis of A(H7N9) infection and associated risk scoring system for step 2

From: A clinical prediction rule for diagnosing human infections with avian influenza A(H7N9) in a hospital emergency department setting

Characteristic βregression coefficient (95%CI) Risk score assigned
Sex
Female Reference 0
Male 0.839 (0.189, 1.489) 11
History of poultry exposure
Yes 4.028 (3.320, 4.736) 54
No Reference 0
Presence of symptoms on presentation
Hemoptysis 1.107 (0.109, 2.105) 15
Shortness of breath 2.240 (1.564, 2.917) 30
Fever 2.769 (1.790, 3.748) 37
Chest radiography
Normal Reference 0
Pneumonia/consolidation 1.711 (0.643, 2.778) 23
Leukocyte count
Low 1.638 (0.909, 2.366) 22
Normal Reference 0
High −1.581 (-2.677, -0.485) −21
Hemoglobin level
Low −0.884 (-1.626, -0.143) −12
Normal Reference 0
High −0.075 (-1.739, 1.590) −1
  1. Hosmer-Lemeshow statistic, 3.57 (P = 0.89). Cutoff threshold for total point score (with a prespecified sensitivity of 0.95): ≥68 indicates high-risk groups; <68 indicates low-risk group. CI, confidence interval.