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

Table 2 Multivariable predicators of a diagnosis of A(H7N9) infection and associated risk scoring system for step 1

Characteristic	βregression coefficient (95%CI)	Risk score assigned
Sex
Female	Reference	0
Male	0.821 (0.217, 1.425)	10
History of poultry exposure
Yes	4.259 (3.606, 4.913)	52
No	Reference	0
Presence of symptoms on presentation
Hemoptysis	1.537 (0.701, 2.372)	19
Shortness of breath	1.961 (1.383, 2.539)	24
Fever	2.624 (1.747, 3.501)	32

Hosmer-Lemeshow statistic, 2.11 (P = 0.98). Cutoff threshold for total point score (with a prespecified sensitivity of 0.95): ≥43 indicates high-risk groups; <43 indicates low-risk group. CI, confidence interval.