TABLE 3.
Analyses of Term Low Birth Weight and Preterm Birth Using Summary Measures of Indoor Air Pollution Variables Among Never Smokers: Environment Pregnancy and Outcomes Study, Los Angeles County, CA, 2003
| Term LBW cases (n = 159) | Preterm cases (n = 727) | Controls (n = 875) | Term LBW Adjusteda OR (95% CI) | Preterm Adjustedb OR (95% CI) | |
|---|---|---|---|---|---|
|
|
|||||
| Home SHS and home window ventilationc | |||||
| No home SHS, moderate/high window ventilation | 67 | 337 | 443 | 1.00 (Ref) | 1.00 (Ref) |
| No home SHS, infrequent/no window ventilation | 65 | 266 | 304 | 1.49 (1.01, 2.20) | 1.25 (0.99, 1.56) |
| Home SHS, moderate/high window ventilation | 11 | 68 | 73 | 0.90 (0.45, 1.81) | 1.15 (0.80, 1.66) |
| Home SHS, infrequent/no window ventilation | 16 | 47 | 37 | 3.20 (1.63, 6.28) | 1.92 (1.19, 3.09) |
| Missing | 0 | 9 | 18 | … | … |
| Personal and household product usage and home window ventilationd | |||||
| Low users and nonusers, moderate/high window ventilation | 47 | 229 | 306 | 1.00 (Ref) | 1.00 (Ref) |
| Low users and nonusers, infrequent/no window ventilation | 43 | 160 | 184 | 1.68 (1.05, 2.68) | 1.26 (0.95, 1.68) |
| Regular/frequent users, moderate/high window ventilation | 24 | 132 | 170 | 0.92 (0.54, 1.57) | 1.02 (0.76, 1.36) |
| Regular/frequent users, infrequent/no window ventilation | 33 | 122 | 125 | 1.85 (1.10, 3.12) | 1.43 (1.04, 1.97) |
| Missing | 12 | 84 | 90 | … | … |
Note. CI = confidence interval; LBW = low birth weight; OR = odds ratio; SHS = secondhand smoke. The sample size was n = 1761.
Adjusted for maternal age, race/ethnicity, education, parity, and mother’s birthplace (US, Mexico, other outside US).
Adjusted for maternal age, race/ethnicity, education, parity, and mother’s birthplace (US, Mexico, other outside US).
SHS exposure defined as living with one or more smokers. Frequent window ventilation defined as keeping the windows open in home at least half the day.
Regular/frequent personal and household product use classified as having used at least 1 of 3 specified products (nail polish, hairspray, insect spray) regularly or frequently during pregnancy. Window ventilation defined as keeping the windows open on average at least half the day.