Table 1.
Infant birthweight, gestational age and parental age, education and socioeconomic status by group (FH+ versus FH−)
| FH+
|
FH−
|
||||
|---|---|---|---|---|---|
| Mean | (std) | Mean | (std) | p | |
| Gestational age (weeks) | 39.9 | 1.0 | 39.9 | 1.0 | .95 |
| Birth weight (grams) | 3682 | 312 | 3468 | 451 | .82 |
| Maternal age (years, months) | 34, 1 | 4, 6 | 33, 5 | 4, 2 | .74 |
| Maternal education1 (years) | 15.27 | .57 | 15.41 | .63 | .84 |
| Paternal age (years, months) | 36, 11 | 4, 4 | 35, 1 | 5, 6 | .87 |
| Paternal education1 (years) | 15.27 | .82 | 15.36 | .53 | .69 |
| Hollingshead score2 | 57.4 | 6.2 | 55.9 | 9.1 | .46 |
1
Note: Parental education is reported in the number of years of schooling; 12 years is equivalent to a high school diploma, 14 years is equivalent to completion of a two-year college or technical degree and 16 years is equivalent to completion of a four-year undergraduate program.
2
57.4 corresponds to the category of major professional while 55.9 corresponds to the category of minor professional.