Table 4.
Characteristics of first live births according to virginity status, from National Longitudinal Study of Adolescent Health. Data are numbers (percentages) unless stated otherwise
| Characteristics | Virgins | Non-virgins |
|---|---|---|
| No of women with live birth | 36 | 4182 |
| Baby’s sex: | ||
| Boy | 20 (59.8) | 2114 (52.2) |
| Girl | 16 (40.2) | 2063 (47.6) |
| Refused/don’t know | 0 (0) | 5 (0.2) |
| Season of birth*: | ||
| Spring | 4 (8.2) | 1035 (24.8) |
| Summer | 15 (48.2) | 1081 (24.8) |
| Fall | 8 (12.8) | 1035 (24.4) |
| Winter | 9 (30.8) | 1031 (26.0) |
| Median (interquartile range) baby’s birth year | 1998 (1997-2000) | 2001 (1998-2004) |
| Median (interquartile range) woman’s age at first birth (years)*** | 19.3 (17.4-20.6) | 21.7 (19.2-24.8) |
Percentages calculated using survey weights to allow population representative inference.
*Spring (March-May), summer (June-August), fall (September-November), winter (December-February).
***P<0.001 using Kruskal-Wallis test of medians for continuous variables and Fisher’s exact test for categorical variables.