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Table 3 Estimated ORs of factors associated with the prevalence of light and at least moderate intensities of infection obtained from the cumulative logit models

From: Using the hierarchical ordinal regression model to analyse the intensity of urinary schistosomiasis infection in school children in Lusaka Province, Zambia

  Model 1 Model 2 Model 3
Variable OR (95% CI) OR (95% CI) OR (95% CI)
Sex
Male 1.19 (0.88, 1.63) 1.52 (1.09, 2.13) 1.53 (1.09, 2.10)
Female 1.00 1.00  
NDVI 1.04 (1.00, 1.07) 1.01 (0.96, 1.05) 1.01 (0.96, 1.05)
T max 0.99 (0.93, 1.04) 1.00 (0.94, 1.07) 1.00 (0.94, 1.07)
Snail abundance
  1.00 (1.00, 1.05) 1.01 (1.00, 1.01) 1.01 (1.00, 1.01)
Age
5–9 years 0.69 (0.51, 0.96) 0.72 (0.51, 0.99) Cat1:0.71 (0.50, 0.99)
Cat2:0.96 (0.45, 1.64)
10–20 years 1.00 1.00 1.00
Altitude
Valley 0.36 (0.25, 0.51) 0.48 (0.16, 0.71) Cat1:0.49 (0.14, 1.75)
Cat2:0.18 (0.04, 0.75)
Plateau 1.00 1.00 1.00
Model selection
LL 1 366.64 1 163.35 1 147.77
AIC 1 382.64 1 205.16 1 198.28
  1. Cat1: Category 1 (light infection); Cat2: Category 2- moderate/high infection; LL: likelihood; AIC: Akaike Information Criterion