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. Author manuscript; available in PMC: 2015 Apr 23.
Published in final edited form as: Pediatrics. 2013 Jul;132(1):e61–e69. doi: 10.1542/peds.2012-3121

TABLE 2.

Prevalence of Enrollment in EI Program Services by 3 Years Old by Selected Characteristics, MA, 1998–2008

Prevalence of Enrollment in EI Program Services, %
Prevalence Risk Ratioa
Late Preterm (N = 6423) Early Term (N = 17 240) Term (N = 49 084) Late Preterm (N = 6423) Early Term (N = 17 240) Term (N = 49 084)
Infant characteristics
 Infant gender
  Boy 27.0 18.3 15.5 1.39 (1.32–1.45) 1.67 (1.61–1.72) 1.85 (1.82–1.89)
  Girl 19.3 11.0 8.3 Reference Reference Reference
 Congenital anomaliesb
  Yes 35.6 23.2 17.0 1.55 (1.46–1.65) 1.49 (1.43–1.56) 1.31 (1.27–1.35)
  No 22.3 14.3 11.6 Reference Reference Reference
Maternal demographics
 Maternal age, y
  <20 27.1 19.5 16.1 0.91 (0.83–1.00) 1.04 (0.97–1.11) 1.02 (0.98–1.06)
  20–24 25.8 17.1 13.4 0.99 (0.92–1.07) 1.04 (0.99–1.09) 0.98 (0.96–1.01)
  25–29 22.4 13.7 11.0 Reference Reference Reference
  30–34 21.5 13.6 11.1 1.02 (0.96–1.09) 1.07 (1.03–1.12) 1.10 (1.07–1.12)
  35–39 24.2 14.9 11.8 1.16 (1.08–1.24) 1.18 (1.13–1.24) 1.16 (1.13–1.20)
  40–44 24.9 15.4 13.1 1.20 (1.08–1.34) 1.21 (1.13–1.30) 1.29 (1.23–1.35)
  45+ 29.2 15.0 14.3 1.51 (0.98–2.35) 1.24 (0.79–1.93) 1.47 (1.07–2.00)
 Maternal education
  No HS or GED 29.9 21.1 17.7 1.20 (1.12–1.28) 1.24 (1.19–1.30) 1.29 (1.25–1.32)
  HS or GED 24.1 15.3 12.4 Reference Reference Reference
  Any post HS 21.1 13.1 10.4 0.96 (0.91–1.01) 0.97 (0.94–1.01) 0.94 (0.92–0.96)
 Maternal race/ethnicity
  Non-Hispanic white 23.4 14.5 11.4 Reference Reference Reference
  African American, non-Hispanic 22.9 15.3 13.1 0.83 (0.77–0.89) 0.89 (0.84–0.94) 1.00 (0.97–1.04)
  Hispanic 26.9 19.3 16.2 1.09 (1.01–1.17) 1.21 (1.16–1.27) 1.28 (1.24–1.32)
  Asian/Pacific Islander 17.6 9.9 8.3 0.88 (0.79–0.99) 0.81 (0.75–0.87) 0.87 (0.83–0.91)
  Other 23.7 13.9 11.6 1.00 (0.86–1.15) 0.92 (0.83–1.03) 0.97 (0.91–1.03)
 Delivery payer source
  Private 20.8 12.9 10.4 Reference Reference Reference
  Public 28.0 18.9 15.4 1.34 (1.26–1.42) 1.41 (1.36–1.47) 1.41 (1.38–1.44)
  Other 15.5 9.5 8.3 0.75 (0.52–1.08) 0.73 (0.58–0.92) 0.83 (0.73–0.95)
 Mother’s language preference
  English 23.9 14.9 11.9 Reference Reference Reference
  Not English 20.1 14.2 12.2 0.78 (0.71–0.86) 0.86 (0.82–0.92) 0.89 (0.86–0.93)
 Maternal nativity
  US-born 24.4 15.5 12.2 Reference Reference Reference
  Non US-born 20.8 13.2 11.1 0.85 (0.79–0.91) 0.79 (0.75–0.83) 0.78 (0.76–0.81)
 Reproductive history
  Parity
   1 22.8 13.9 11.1 Reference Reference Reference
   2 23.0 15.0 12.2 0.99 (0.94–1.04) 1.08 (1.04–1.11) 1.10 (1.08–1.12)
   3 24.6 15.7 12.8 1.02 (0.95–1.09) 1.07 (1.02–1.11) 1.08 (1.05–1.11)
   4 or more 27.4 17.5 14.3 1.04 (0.96–1.13) 1.09 (1.03–1.15) 1.10 (1.06–1.13)

GED, General Educational Development high school equivalency examination; HS, high school.

a

Adjusted for all variables included in the table.

b

Congenital anomalies included anencephaly, spina bifida, hydrocephalus, microcephalus, other central nervous system anomaly, heart malformations, other circulatory/respiratory disorder, rectal atresia/stenosis, tracheo-esophageal fistula, omphalocele, gastroschisis, other gastrointestinal anomalies, malformed genitalia, renal agenesis, other urogenital anomalies, cleft lip/pal ate, polydactyly, syndactyly, adactyly, clubfoot, diaphragmatic hernia, other musculoskeletal anomaly, Down syndrome, other chromosomal anomaly, and other diagnosis without category.