what is the irr what is the rate ratio for an increase in hispanic irr what is the irr in a zero-inflated negative-binomial model what is irr what is the irr how to interpret the irr what is the irr rate in a negative model? what is the irr definition of irr what is incidence rate ratio what is my irr what is irr what is irr when to use an irr does the irr mean a constant increase which of the following would you interpret the incidence rate ratio? what is the irr what is the irr in my study what is the irr of the incidence ratio what does it mean to interpret irr