Table 4

Estimates of the risk (odds ratio) of getting a “low” Bayley score at age 13 months among children breast fed for less than 3 months compared to children breast fed for at least 6 months, and odds ratio adjusted for maternal age, education, smoking, and Raven score

nOR (95% CI)
MDIPDI
Breast feeding alone2733.2 (1.7–5.9)1.5 (0.8–2.6)
Breast feeding + mother's age2681.7 (1.3–2.4)1.2 (0.9–1.6)
Breast feeding + education2711.8 (1.3–2.5)1.2 (0.9–1.6)
Breast feeding + smoking2721.9 (1.3–2.6)1.1 (0.8–1.5)
Breast feeding + Raven score1931.6 (1.1–2.3)1.3 (0.9–1.8)
  • MDI, Mental Developmental Index; PDI, Psychomotor Developmental Index.