Table 1.
The characteristics of RICHS study subjects
| NS (n=37) | 1st trimester-only smokers (n=23) | FT pregnancy smokers (n=36) | P value | |
|---|---|---|---|---|
| Maternal | ||||
| Age, mean (range) | 29.18 (18–40) | 27.91 (20–39) | 27.14 (20–38) | 0.35 |
| BMI | ||||
| Normal | 17 (45.95%) | 9 (39.13%) | 18 (50%) | 0.45 |
| Overweight | 7 (18.92%) | 8 (34.78%) | 10 (27.78%) | |
| Obese | 12 (32.43%) | 6 (26.09%) | 6 (16.67%) | |
| Maternal education | ||||
| <11th grade | 2 (5.41%) | 0 | 11 (30.56%) | 0.002 |
| High school graduate | 9 (24.32%) | 10 (43.48%) | 9 (25%) | |
| Junior college | 10 (27.03%) | 7 (30.43%) | 12 (33.33%) | |
| College graduate | 10 (27.03%) | 4 (17.39%) | 4 (11.11%) | |
| Post graduate school | 6 (16.22%) | 2 (8.7%) | ||
| Gender | ||||
| Male | 13 (35.14%) | 11 (47.83%) | 16 (44.44%) | 0.62 |
| Female | 24 (64.86%) | 12 (52.17%) | 20 (55.56%) | |
| Birthweight group | ||||
| AGA | 19 (51.35%) | 13 (56.52%) | 15 (41.67%) | 0.006 |
| LGA | 12 (32.43%) | 6 (26.09%) | 3 (8.33%) | |
| SGA | 6 (16.22%) | 4 (17.39%) | 18 (50%) | |
| Birthweight (g) | 3666.0±650.68 | 3378.48±683.37 | 3011.5±598.58 | 0.0001 |
| Range (g) | 2510–4920 | 1920–4530 | 2280–4380 | |
| Gestational weeks | 39.22 (37–41) | 39.28 (37–41) | 39.04 (37–41) | 0.54 |
AGA: Appropriate for Gestational Age
LGA: Large for Gestational Age
SGA: Small for Gestational Age