Table 3

Comparison of matching and other variables: bedtime cortisol to creatinine ratio

IUGR (n = 39)Controls (n = 58)
Values are mean (SD) or percentages.
IUGR, Intrauterine growth retarded.
Matched factors
    Sex (male)62%60%
    Feeding (breast)59%50%
    Maternal smoking (yes)44%34%
    Social class
        I or II31%40%
        IIIn or IIIm49%51%
        IV or less21%9%
Unmatched factors
    Maternal age (years)28.3 (5.3)30.0 (4.2)
    Gestation (weeks)38.4 (1.4)40.2 (1.6)
    Birth weight (g)2642 (491)3552 (494)