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Table 4 Results from the Cox proportional hazard analysis on time to death for X. cheopis and S. fonquerniei

From: Effect of temperature and relative humidity on the development times and survival of Synopsyllus fonquerniei and Xenopsylla cheopis, the flea vectors of plague in Madagascar

 

Variable

Coefficient

95 % CI

P-value

Approx. hazard

X. cheopis

Temperature

0.01

0.97–1.04

0.56

1.01

Relative humidity 90 %

−0.347

0.52–0.94

0.018

0.7

Temperature | Relative humidity

−0.016

0.92–1.04

0.57

0.98

S. fonquerniei

Temperature

−0.016

0.96–1.00

0.062

0.98

Relative humidity 90 %

−0.271

0.67–0.86

<0.0001

0.76

Temperature | Relative humidity

−0.046

0.93–0.97

0.0003

0.95

  1. Temperature was included as a continuous variable while relative humidity was considered dichotomous. Hazard values are estimated hazard values, calculated by taking the exponential of the coefficient