Table 1.
Sociodemographic and health-related variables in the NHANES III in our analytic samplea
| Variable | Category | Number of respondentsb |
Percent (95% CI)c |
|---|---|---|---|
| Gender | Male Female |
3402 4038 |
50.0 (48.7–51.4) 50.0 (48.6–51.3) |
| Age (years) | 15–19 20–29 30–39 |
1600 3003 2837 |
16.7 (15.0–18.6) 40.3 (37.8–42.8) 43.0 (40.3–45.6) |
| Ethnicity | non-Hispanic white non-Hispanic black Mexican American All other |
2134 2470 2519 317 |
71.5 (68.3–74.6) 12.6 (11.1–14.3) 7.2 (5.9–8.6) 8.7 (6.9–10.8) |
| SES (poverty level) | Below At or above |
2047 4787 |
16.3 (14.2–16.5) 83.7 (81.5–85.8) |
| Education | <High School High School >High School |
2486 2538 2377 |
20.3 (18.2–22.4) 34.7 (32.4–37.1) 45.0 (42.3–47.8) |
| Foreign birth | Outside US Inside US |
1780 5645 |
13.7 (11.2–16.4) 86.3 (83.6–88.8) |
| Smoking status | Current smoker Past/Never smoker |
2094 4623 |
37.3 (34.9–39.8) 62.7 (60.3–65.1) |
| T. gondii antibody titers (T. gondii serology) |
Negative (< 6 IU) Positive (>=6 IU) High titer (>=240 IU) Intermediate titer (6-239 IU) |
6229 1211 291 920 |
85.5 (84.0–87.0) 14.5 (13.0–16.0) 3.0 (2.4–3.7) 11.5 (10.2–12.8) |
| CRP level | <2.2 mg/L >2.2 mg/L |
5589 1812 |
79.5 (77.4–81.5) 20.5 (18.5–22.6) |
a
Analytic sample consisted of individuals age 15–39 years who were interviewed, examined, had serologic testing to T. gondii and complete mood disorder data (N=7440).
b
Number of respondents may not add to the total sample due to missing data for some variables.
c
- Weighted percent of U.S. population as described in methods.