Comparison of matching and other variables: morning cortisol to creatinine ratio
| IUGR (n = 31) | Controls (n = 44) | |
|---|---|---|
| Values are mean (SD) or percentages. | ||
| IUGR, Intrauterine growth retarded. | ||
| Matched factors | ||
| Sex (male) | 65% | 66% |
| Feeding (breast) | 55% | 48% |
| Maternal smoking (yes) | 39% | 32% |
| Social class | ||
| I or II | 39% | 39% |
| IIIn or IIIm | 35% | 52% |
| IV or less | 26% | 9% |
| Unmatched factors | ||
| Maternal age (years) | 39.0 (5.5) | 30.7 (4.2) |
| Gestation (weeks) | 38.5 (1.4) | 40.0 (1.7) |
| Birth weight (g) | 2694 (520) | 3568 (501) |