Table 1.
Descriptive statistics by study group
| Variable | ART group n = 67 |
SC group n = 31a |
P-value |
|---|---|---|---|
| Maternal Characteristics | n (%) | n (%) | |
| Race | |||
| White | 64 (95.5) | 27 (90.0) | 0.37b |
| Non-white | 3 (4.5) | 3 (10.0) | |
| Education | |||
| < College degree | 10 (14.9) | 10 (33.3) | 0.10b |
| College degree | 26 (38.8) | 11 (36.7) | |
| Advanced degree | 31 (46.3) | 9 (30.0) | |
| Household income | |||
| < 40 K | 4 (6.0) | 7 (23.3) | 0.02b |
| 40 K- < 80 K | 18 (26.9) | 10 (33.3) | |
| 80 K + | 45 (67.2) | 13 (43.3) | |
| Age at child's birth | |||
| Mean (SD) | 34.1 (3.9) | 29.6 (4.3) | < 0.001c |
| Time to pregnancy | |||
| Not trying | 9 (31.0) | ||
| < 12 months | 18 (62.1) | ||
| ≥ 12 months | 2 (6.9) | ||
| Child Characteristics | n (%) | n (%) | |
| Sex | |||
| Female | 32 (47.8) | 13 (43.3) | 0.83b |
| Male | 35 (52.2) | 17 (56.7) | |
| Plurality | |||
| Singleton | 44 (65.7) | 30 (100.0) | < 0.001b |
| Twins+ | 23 (34.3) | 0 (0.0) | |
| Year of birth | |||
| 2005 | 7 (10.4) | 9 (30.0) | 0.11b |
| 2006 | 23 (34.3) | 8 (26.7) | |
| 2007 | 23 (34.3) | 10 (33.3) | |
| 2008 | 14 (20.9) | 3 (10.0) | |
| Birth weight (grams) | |||
| mean (SD) | 3005.57 (790.9) | 3458.1 (701.9) | 0.008c |
| Age (years) | |||
| mean (SD) | 2.5 (0.97) | 3.0 (1.00) | 0.02c |
a One mother did not fill out the questionnaire and is missing all responses
b Fisher's exact test
c Two-sample t-test