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Table 2 Negative binomial regression analysis showing effects of age, gender, species and season on incidences of malaria (N = 925 spring (March through May), summer (June through September), autumn (October through November) and winter (December through February)

From: Occurrence and seasonal variation of human Plasmodium infection in Punjab Province, Pakistan

CoefficientsCategories sub typeEstimateStd. ErrorZ valuePr(>|z|)
Intercept 3.79870.238215.949< 2e-16 ***
Age groups(1–20) Years2.19170.180012.174< 2e-16 ***
(21–40) Years−0.12710.1496−0.8490.395796
(41–60) Years−0.93920.1653−5.6801.34e-08***
(61–100) Year−2.43900.2298- 10.614< 2e- 16***
GenderMale0.84660.12566.7411.57e-11 ***
Species TypesP. vivax &P. falciparum−0.85620.1751−4.8891.01e-06 ***
P. vivax1.03080.14107.3112.65e-13 ***
SeasonsSpring−0.56710.1669−3.3970.000681 ***
Summer0.37370.15122.4720.013436 *
Winter−2.13740.2311−9.249< 2e-16 ***
  1. Significant. Codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 “1
  2. The predictor’s age, sex, species and season predicting number of incidences are significant predictors