Table 3.
Number of Cigarettes per Day and Birth Cotinine Levels by Different Smoking Groups (N=172)
| Smoking Group | |||||
|---|---|---|---|---|---|
| Control | Light (<10/day) | Moderate (10 to 19/day) | Heavy (20+/day) | ||
| n=57 | n=42 | n=58 | n=15 | Statistic | |
| 3 mo Prior | 0 | 10.5 (6.2) | 21.0 (5.1) | 25.3 (9.3) | F(1,168)=596.6, p <.000 |
| 1st Trimester | 0 | 6.9 (4.4) | 16.0 (6.1) | 23.7 (8.6) | F(1,168)=462.0, p <.000 |
| 2nd Trimester | 0 | 1.8 (2.9) | 7.6 (5.7) | 23.0 (11.3) | F(1,168)=236.8, p <.000 |
| 3rd Trimester | 0 | 1.1 (1.8) | 7.2 (5.4) | 17.9 (9.7) | F(1,168)=218.4, p <.000 |
| Birth Blood Cotinine1 | .62 (4.0) | 3.4 (10.1) | 16.6 (29.6) | 41.8 (89.9) | F(1,105)=13.95, p <.000 |
1
Data available on 42 controls, 23 light, 36 moderate, and 8 heavy smokers.