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

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

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

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.

ISSN: 1741-7015