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Table 6 Two degrees of freedom of chi-square test for explanatory variable ‘occupation’ (a: negative binomial and b: Poisson model)

From: Factors associated with the utilization of antenatal care and prevention of mother-to-child HIV transmission services in Ethiopia: applying a count regression model

. test 1. Occupation 2. Occupation . test 1. Occupation 2. Occupation
(1) [Visits] 1. Occupation = 0 (1) [Visits] 1. Occupation = 0
(2) [Visits] 2. Occupation = 0 (2) [Visits] 2. Occupation = 0
  chi2 (2) = 0.12   chi2 (2) = 0.14
  Prob > chi2 = 0.9431   Prob > chi2 = 0.9314
  (a: negative binomial)   (b: Poisson) model