This question already has an answer here:
glm1 = glmer(Mortality ~ CCI + PatientRace + PatientSex + age_cat + (CCI | FacilityIdentifier), data = tmp, family = binomial, control = glmerControl(optimizer = "bobyqa"), nAGQ = 1)
m1 = glm(Mortality ~ CCI + PatientRace + PatientSex + age_cat, family=binomial, data = tmp)
To determine if the random effect is a significant contributor, hopefully to show that each facility doesn't have varying practices in measuring CCI that may affect interpretation of mortality. Would appreciate any advice.