highly significantp < 0.001
The Vuong test of a zero-inflated Poisson versus a standard Poisson, run in Stata was also highly significant (p < 0.001) indicating that the zero-inflated model was better.
The Vuong test of a zero-inflated Poisson versus a standard Poisson, run in Stata was also highly significant (p < 0.001) indicating that the zero-inflated model was better.
Previously sibling mortality was marginally significant following multivariable adjustment (IRR = 1.032, p = 0.088).