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Table 4 Final regression models US/MEX: EDF value is reported as the coefficient, and DF is included in parentheses (not standard errors because a chi-square test is used for the smooth terms)

From: Influence of socio-economic, demographic and climate factors on the regional distribution of dengue in the United States and Mexico

  GDP model SE model Dem model Clim model GDP full model Full model
Intercept 3.19*** (0.26) 2.44*** (0.22) 2.53*** (0.23) 2.46*** (0.23) 2.59*** (0.22) 2.22*** (0.20)
Per capita GDP 0.00*** (0.00)     0.00*** (0.00)  
Socio-economic index   1.87*** (1.97)     1.78*** (1.92)
Active physicians per 1000   1.72** (1.90)    1.87*** (1.97) 1.88*** (1.98)
Households (%) with broadband access   1.94*** (1.99)    1.95*** (1.99) 1.95*** (1.99)
Quality of life index   1.78* (1.92)    1.00 (1.00) 1.00 (1.00)
Inter-regional migration rate    1.00*** (1.00)   1.65 (1.85) 1.61 (1.82)
Pop density growth    1.82 (1.96)   1.00*** (1.00) 1.00*** (1.01)
Percentage of population (65+)    1.97*** (1.99)   1.93*** (1.96) 1.79*** (1.89)
Mean temp (°C) of coldest quarter     1.90*** (1.98) 1.88*** (1.97) 1.83*** (1.95)
Precip of warmest quarter (in)     1.57* (1.81) 1.63* (1.84) 1.53** (1.76)
Year 7.27*** (8.00) 6.75*** (8.00) 6.99*** (8.00) 7.28*** (8.00) 6.61*** (8.00) 6.61*** (8.00)
Region 13.3*** (13.91) 12.76*** (13.72) 13.04*** (13.69) 12.72*** (13.81) 10.46*** (12.24) 10.45*** (12.19)
AIC 2339.82 2322.32 2332.83 2285.47 2233.10 2231.57
Deviance 1288.59 1205.43 1257.24 1143.83 967.55 962.59
Deviance explained 0.51 0.55 0.53 0.59 0.66 0.66
Dispersion 3.52 3.37 3.47 3.20 2.84 2.83
\(\text {R}^2\) 0.36 0.42 0.40 0.40 0.51 0.51
Num. obs. 306 306 306 306 306 306
Num. smooth terms 2 6 5 4 10 11
  1. *** p < 0.01; ** p < 0.05; * p < 0.1