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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.