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Table 4 Ridge regression coefficients between monthly climatic variables and logarithmic incidence of bacillary dysentery (with k = 0.5, 1950–1996, Shenyang, China)

From: Investigating the effects of climate variations on bacillary dysentery incidence in northeast China using ridge regression and hierarchical cluster analysis

Duration R2 Minimum temperature Average temperature Maximum temperature Air pressure Relative humidity Precipitation Evaporation Long-term Effect Season
1950–1966, Jan – Jul 0.718 0.079* 0.072* 0.051* -0.042 0.053 0.156* 0.032 0.458* 0.110*
1950–1966, Aug – Dec 0.818 0.109* 0.075* 0.067* -0.093* -0.047 0.068 0.148* 0.442* -0.084*
1967–1976, Jan – Jul 0.653 0.138* 0.115* 0.106* -0.097* 0.149* 0.096 -0.009 0.142* 0.106*
1967–1976, Aug – Dec 0.768 0.101* 0.092* 0.076* -0.156* 0.103 0.013 0.073* 0.338* -0.101*
1977–1986, Jan – Jul 0.490 0.072* 0.046 0.063* -0.033 0.222* 0.119 0.114* 0.111 0.052
1977–1986, Aug – Dec 0.822 0.113* 0.127* 0.153* -0.118* -0.041 0.065 0.189* -0.094* -0.125*
1987–1996, Jan – Jul 0.822 0.131* 0.115* 0.100* -0.069* 0.148* 0.207* -0.017 -0.140* -0.154*
1987–1996, Aug – Dec 0.892 0.154* 0.144* 0.142* -0.101* 0.048 0.058 0.125* -0.132* -0.135*
1950–1996, Jan – Jul 0.306 0.107* 0.082* 0.080* -0.030 0.018 0.131* -0.027 0.045 0.111*
1950–1996, Aug – Dec 0.430 0.134* 0.105* 0.094* -0.110* -0.116* 0.062 0.071* 0.016 -0.116*
  1. * P < 0.05