TABLE 4.
Secondary Outcomes, Adjusted Incident Rate Ratios, and aRRs
| IOE, aIRR (95% CI) | |
|---|---|
| Nonroutine primary care visits by age 2 y | 1.00 (0.95–1.05) |
| On-time immunization status by age 2 y | 1.00 (0.95–1.05)a |
| Lead screening at age 1 y | 1.13 (0.99–1.28)a |
The multivariable negative binomial regression was adjusted for race, ethnicity, insurance, low birth weight status, complex chronic condition, sex, area-level poverty, metropolitan residence, and year of birth; clustering by practice was adjusted by using robust variance estimation. aIRR, adjusted incident rate ratio.
a
The multivariable generalized linear regression with a log link and Poisson distribution was adjusted for race, ethnicity, insurance, low birth wt status, complex chronic condition, sex, area-level poverty, metropolitan residence, and year of birth; clustering by practice was adjusted by using robust variance estimation.