Table 3.
Percent change (95% CI) in amniotic fluid environmental pollutant concentration by one unit increase in calendar year of amniocentesis (1980–1996), gestational week of amniocentesis (12–22), and maternal age at amniocentesis (17–44 years).
| Percent changea | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Environmental pollutant | Per calendar year | Per gestational week | Per year of maternal age | |||||||||
| Crude | Adjusted (95% CI)b | Crude | Adjusted (95% CI)c | Crude | Adjusted (95% CI)d | |||||||
| 5cx-MEPP | –3.4 | –3.5 (–4.8, –2.1) | 12.5 | 9.9 (4.8, 15.2) | –1.1 | –0.6 (–1.9, 0.8) | ||||||
| 7cx-MMeHP | 7.1 | 7.1 (5.3, 9.0) | 3.5 | 8.6 (2.7, 14.9) | –0.6 | 0.5 (–1.0, 2.1) | ||||||
| PFOS | 1.1 | 1.5 (–0.3, 3.2) | 8.4 | 9.4 (3.3, 15.9) | 0.1 | 0.4 (–1.2, 2.0) | ||||||
| aThe ratio of medians estimated by linear regression with the pollutant concentration on the ln scale. bAdjusted for maternal smoking, parity, gestational age at amniocentesis, and maternal age. cAdjusted for maternal smoking, parity, year of amniocentesis, and maternal age. dAdjusted for maternal smoking, parity, year of amniocentesis, and gestational age at amniocentesis. | ||||||||||||