Table 1.
Comparison of demographic characteristics between the first and second cohorts of second trimester pregnant women recruited from San Francisco General Hospital, San Francisco, Californiaa.
| 2008–2009 (n = 25) N (%) |
2011–2012 (n =36) N (%) |
pb | |
|---|---|---|---|
| Age, years | 0.06 | ||
| 16 – 19 | 9 (36%) | 4 (11%) | |
| 20 – 29 | 12 (48%) | 25 (69%) | |
| 30 – 42 | 4 (16%) | 7 (19%) | |
| Ethnicity | 0.22 | ||
| Latina | 9 (36%) | 8 (23%) | |
| African-American | 10 (40%) | 10 (29%) | |
| White | 3 (12%) | 12 (34%) | |
| Asian/Other | 3 (12%) | 5 (14%) | |
| Insurance | |||
| Medi-Cal | 20 (80%) | 28 (80%) | 0.99 |
| Private/Self-Pay | 5 (20%) | 7 (20%) | |
| Marital status | |||
| Single | 22 (92%) | 28 (93%) | 0.97 |
| Married | 1 (4%) | 1 (3%) | |
| Separated | 1 (4%) | 1 (3%) | |
| Country of origin | 0.69 | ||
| U.S. | 22 (88%) | 33 (94%) | |
| non-U.S. | 3 (12%) | 2 (6%) | |
| Parity | 0.27 | ||
| nulliparous | 8 (32%) | 11 (31%) | |
| parity ≥ 1 | 17 (68%) | 25 (69%) | |
| Current smokersc | <0.0001 | ||
| No | 25 (100%) | 23 (64%) | |
| Yes | 0 (0%) | 13 (36%) | |
|
| |||
| Mean (± SD) | Mean (± SD) | ||
| Age, years | 23.5 ± 7.3 | 24.9 ± 5.5 | 0.41 |
| Gestational age, weeks | 20.5 ± 1.2 | 20.0 ± 2.1 | 0.23 |
| Lipids, mg/ml | 6.9 ± 1.0 | 6.5 ± 0.8 | 0.11 |
Abbreviations: SD = standard deviation
a
Data were missing for marital status (n=1) in the 2008–2009 cohort; and race/ethnicity (n=1), insurance (n=1), marital status (n=6), and country of origin (n=1) in the 2011–2012 cohort.
b
Differences across cohorts were evaluated by chi-square for categorical variables and ANOVA for continuous variables.
c
Current smokers were not recruited in the 2008–2009 cohort as part of the study design.