. Author manuscript; available in PMC: 2015 Aug 1.

Published in final edited form as: J Infect. 2014 Mar 15;69(2):174–181. doi: 10.1016/j.jinf.2014.03.006

Table 1.

Risk factors for H7N9 infections in humans based on surveillance data, March–May 2013.

Variable	Odds ratio (95% C.I.)	Coefficient	SE	p value
Intercept	Not applicable	−3.939	0.404	<.0001
LBM density (markets per km²)	1.08 (1.04–1.12)	0.0733	0.0184	<.0001
Relative humidity (%)	0.99 (0.98–1.01)	−3.13 × 10⁻³	7.1 × 10⁻³	0.6595
Temperature (°C)	1.04 (0.99–1.08)	0.0378	0.0198	0.0563
Human population density (people per km²)	1 (1–1)	4.5 × 10⁻⁵	1.72 × 10⁻⁴	0.7918