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Table 3 Zero-inflated negative binomial regression output for the Navrongo cohort

From: Analysis of partial and complete protection in malaria cohort studies

Negative binomial component Logistic component
Incidence rate ratios (IRR) Odds ratio (OR) for not having malaria
  IRR (95% CI) P   OR (95% CI) p
IPTi 0.87 (0.78, 0.97) 0.01 IPTi 1.16 (0.46, 2.89) 0.755
Zone of residence    Zone of residence   
urban -   urban -  
rocky highland 1.22 (0.95, 1.58) 0.123 rocky highland 0.22 (0.02, 2.85) 0.247
lowland rural 1.27 (1.08, 1.51) 0.005 lowland rural 0.04 (0, 0.97) 0.048
irrigated rural 1.27 (1.05, 1.54) 0.016 irrigated rural 0.08 (0.01, 0.85) 0.036
Season of birth    -   
late wet -     
early dry 0.99 (0.88, 1.10) 0.8    
late dry 0.86 (0.77, 0.97) 0.015    
early wet 0.94 (0.84, 1.06) 0.305    
Sex (female vs male) 0.96 (0.90, 1.04) 0.335 -   
  1. Table shows output from the zero-inflated negative binomial regression model. Incidence rate ratios are from the count component and odds ratios are from the logistic component.
  2. CI = confidence interval; IPTi = intermittent preventive treatment in infants.