TABLE 2—
Odds Ratios for Preterm Birth in Relation to Maternal Occupation Among All Working Women: Environment and Pregnancy Outcomes Study; Los Angeles County, CA; 2003
| Occupation | No. | OR (95% CI) | AORa (95% CI) |
| Office and administrative support occupations (Ref) | 229 | 1.00 | 1.00 |
| Management occupations | 79 | 0.95 (0.56, 1.60) | 1.02 (0.58, 1.79) |
| Business operations specialists | 19 | 0.41 (0.13, 1.28) | 0.43 (0.13, 1.35) |
| Financial specialists | 26 | 1.13 (0.50, 2.58) | 1.35 (0.58, 3.16) |
| Computer and mathematical occupations | 10 | 1.03 (0.28, 3.75) | 1.21 (0.32, 4.58) |
| Life, physical, and social science occupations | 15 | 0.56 (0.17, 1.82) | 0.70 (0.21, 2.37) |
| Community and social services occupations | 22 | 2.23 (0.92, 5.43) | 2.28 (0.90, 5.80) |
| Legal occupations | 23 | 1.42 (0.60, 3.35) | 1.67 (0.68, 4.10) |
| Education, training, and library occupations | 107 | 0.96 (0.60, 1.54) | 1.09 (0.65, 1.82) |
| Arts, design, entertainment, sports, and media occupations | 34 | 0.84 (0.40, 1.79) | 0.92 (0.40, 2.10) |
| Health care practitioners and technical occupations | 63 | 1.40 (0.80, 2.46) | 1.79 (0.96, 3.33) |
| Health care support occupations | 52 | 0.97 (0.52, 1.79) | 0.93 (0.49, 1.78) |
| Food preparation and serving occupations | 74 | 1.54 (0.91, 2.62) | 1.64 (0.94, 2.85) |
| Building and grounds cleaning and maintenance occupations | 54 | 2.25 (1.23, 4.11) | 1.86 (0.95, 3.63) |
| Personal care and service occupations | 47 | 0.96 (0.50, 1.83) | 0.84 (0.43, 1.63) |
| Sales occupations | 162 | 1.33 (0.89, 2.00) | 1.33 (0.87, 2.03) |
| Production occupations | 91 | 1.45 (0.89, 2.36) | 1.43 (0.83, 2.45) |
| Transportation and material moving operations | 41 | 1.79 (0.92, 3.49) | 1.79 (0.89, 3.61) |
| Studentsb | |||
| High school | 17 | 1.37 (0.51, 3.69) | 1.25 (0.43, 3.68) |
| College or university | 27 | 1.06 (0.47, 2.39) | 1.20 (0.51, 2.82) |
Note. AOR = adjusted odds ratio; CI = confidence interval; OR = odds ratio. Results are shown for occupation categories (n ≥ 10). Preterm birth < 37 weeks vs term birth ≥ 37 weeks, non-low birth weight (≥ 2500 g). The sample size was n = 1211 (excludes term low birth weight, n = 130). Occupations were grouped according to the 2000 US Census Occupational Classification System.36
a
Adjusted for maternal age, race/ethnicity, and maternal education.
b
High school and college or university students are additional categories not based on occupation codes.