Table 3.

Estimates of percent change (95% CI) in weekly influenza cases associated with a 1-unit increase in other meteorological parameters stratified by RH.

	Low-RH	High-RH
AT	−3.12% (−4.75%, −1.46%)*	0.42% (−2.38%, 3.30%)
AP	−5.42% (−7.99%, −2.22%)*	−1.03% (−1.03%, 3.99%)
WS	97.80% (29.78%, 201.46%)*	104.90% (−42.85%, 634.27%)

“*”represents significance at the level of 0.05. Taking the 5th and 95th percentiles as tangent points of the binary categorical variables, relative humidity (RH) was divided into two levels of “low” and “high.” When RH was less than the 5th percentile, the environment was defined as Low-RH. When RH was greater than the 95th percentile, the environment was defined as High-RH.