Skip to main content

Table 1 The association between monthly scrub typhus incidence and potential influencing factors by panel negative binomial regression

From: Rapid increase of scrub typhus incidence in Guangzhou, southern China, 2006―2014

Variables (unit)a Univariate analysis Multivariate analysis
Crude IRR (95% CI) P-value Adjusted IRR (95% CI) P-value
AP (1 hPa) 0.87 (0.86, 0.87) <0.001 0.89 (0.88, 0.90) <0.001
Temperature (1 °C) 1.17 (1.16, 1.18) <0.001 NS (excluded)  
RH (10%) 1.11 (1.10, 1.12) <0.001 1.04 (1.03, 1.05) <0.001
Precipitation (1 mm) 1.002 (1.002, 1.002) <0.001 NS (excluded)  
WV (1 m/s) 0.26 (0.22, 0.30) <0.001 NS (excluded)  
ST (10%) 1.03 (1.03, 1.03) <0.001 NS (excluded)  
Croplands (10%) 0.97 (0.95, 0.99) 0.001 NS (excluded)  
CV (10%) 0.98 (0.96, 0.99) <0.001 NS (excluded)  
BF (10%) 1.05 (1.04, 1.06) <0.001 1.05 (1.03, 1.06) <0.001
NF (10%) 1.06 (1.04, 1.08) <0.001 NS (excluded)  
MF (10%) 1.04 (1.02, 1.07) 0.001 NS (excluded)  
GF (10%) 1.15 (1.03, 1.27) 0.012 NS (excluded)  
Shrub (10%) 1.01 (1.01, 1.02) <0.001 NS (excluded)  
HV (10%) 0.96 (0.95, 0.97) <0.001 NS (excluded)  
AS (10%) 0.99 (0.99, 0.99) <0.001 NS (excluded)  
BL (10%) 0.89 (0.84, 0.93) <0.001 NS (excluded)  
WB (10%) 1.001 (0.997, 1.006) 0.538 -  
Elevation (10 m) 1.09 (1.07, 1.11) <0.001 NS (excluded)  
FT 1.23 (1.02,1.48) 0.033 1.81 (1.43,2.29) <0.001
  1. aAP, monthly average atmospheric pressure with 1-month lag; Temperature, monthly average temperature with 1-month lag; RH, monthly average relative humidity with 2-month lag; Precipitation, monthly aggregate precipitation with 2-month lag; WV, monthly average wind velocity with 1-month lag; ST, current monthly aggregate proportion of sunlight time; Croplands, percentage coverage of post-flooding or irrigated croplands (or aquatic) and rainfed croplands; CV, percentage coverage of mosaic cropland and vegetation (grassland/shrub/forest); BF, Percentage coverage of broadleaved forest; NF, percentage coverage of needle leaved forest; MF, percentage coverage of mixed broadleaved and needle leaved forest; GF, percentage coverage of mosaic grassland and forest or shrub; Shrub, percentage coverage of broadleaved or needle leaved, and evergreen or deciduous shrub; HV, percentage coverage of herbaceous vegetation (grassland, savannas or lichens/mosses); AS, percentage coverage of artificial surfaces and associated areas; BL, percentage coverage of bared land; WB, percentage coverage of water bodies; Elevation, mean elevation; FT, feature of township (rural vs. urban)