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Table 5 Ordinal logistic regression models of socio-demographics and knowledge of the house fly

From: A cross sectional survey of knowledge, attitude and practices related to house flies among dairy farmers in Punjab, Pakistan

Model H0 −2LL* P£
Locality + Age + Education + Int**   142.76 ---
Locality + Age + Education βInt = 0 146.83 0.250
Locality + Education βAge = 0 151.11 0.015
  1. *-2 log likelihood, ** All possible 2 way interactions, £ p values based chi square of −2 log likelihood difference between the reduced model and initial model. The predictors: localities, age and education level of the farmers had P values < 0.25 and were the potential predictors in univariate analysis (Figure 2). These three potential predictors were then entered in the multivariate model by following the methodology of Hosmer and Lemeshow [17]. In succeeding steps, the predictors with a P > 0.05 in the previous step were removed from the model until complete loss of fit (P < 0.05) of the model was achieved.