Table 5.

Results of Regression Models of Head Circumference, Ponderal Index, and Weight/Head Ratio of 530 Mother–Infant Pairs, Showing Data for Pairs With HIV-Positive Mother in Butare, Rwanda, 1989–1994

OutcomeMother–Child
HIV Status
nChanges in Outcome Measure With 95% CI
UnadjustedAdjusted for
Gestational Age
Full Model§
Head circumference (cm)433
Infant infected−0.8 (−1.3, −0.3) −0.6 (−1.1, −0.2) −0.6 (−1.1, −0.2)
Infant not infected000
Ponderal index434
Infant infected−0.16 (−0.25, −0.06) −0.15 (−0.24, −0.06) −0.14 (−0.23, −0.05)
Infant not infected000
Weight/head ratio439
Infant infected−4.8 (−8.3, −1.4) −3.8 (−6.9, −0.7)* −3.5 (−6.4, −0.5)*
Infant not infected000
  • * P ≤ .05;

  • P ≤ .01.

  • § Groups 1 and 3 were compared with group 2, using the same linear regression model for both t tests. Coefficients for group 3 compared with group 2 are not shown, because none was statistically significant.

    Models included, for head circumference: mother–infant HIV status, gestational age, infant's sex, maternal education, height, and hematocrit; for ponderal index: mother–infant HIV status, gestational age, income, mother's MUAC, and hematocrit; for weight/head ratio: mother–infant HIV status, gestational age, maternal parity, height, marital status, MUAC and hematocrit.