TABLE 3

aRRs for ≥1 WCC Gap Over the First 2 Years of Life

≥1 WCC Gap Over the First 2 y, aRR (95% CI)a
IOE1.43 (1.20–1.71)*
Child race
 WhiteReference
 African American1.36 (1.18–1.56)*
 Asian American1.24 (1.04–1.48)*
 Other1.26 (1.09–1.46)*
 Unknown0.93 (0.69–1.26)
Ethnicity
 Non-HispanicReference
 Hispanic0.84 (0.72–0.98)*
 Unknown1.08 (0.84–1.39)
Insurance
 PrivateReference
 Medicaid2.00 (1.58–2.53)*
 Other or unknown1.53 (0.90–2.63)
Low birth wt <2500 g0.90 (0.81– <1.00)*
Complex chronic condition0.82 (0.75–0.90)*
Child sex
 FemaleReference
 Male0.97 (0.91–1.02)
Area-level povertyb1.02 (1.01–1.02)*
Metropolitan residence1.01 (0.81–1.27)
  • Generalized linear models with a log link and Poisson distribution.

  • a Adjusted for all variables listed in the table, year of birth as a fixed effect, and clustering by practice by using robust variance estimation.

  • b The coefficient represents a change in the relative risk per 1% increase.

  • * P < .05.