Table 4.
Brief Symptom Inventory Global Severity Index (GSI) T Score Difference (with 95% Confidence Interval, CI) per Interquartile Increase of Exposures of Interest (NO2 - ppb, O3 - ppb, PM2.5 - μg/m3) In Normative Aging Study, 2000-2014.
| Exposure | Window a | Estimate b (95% CI) Model I c |
Estimate (95% CI) Model II d |
|---|---|---|---|
| NO2 | 1Wk | 0.41 (−0.75, 1.56) | 0.38 (−0.83, 1.58) |
| 4Wk | 0.48 (−0.89, 1.85) | 0.48 (−0.93, 1.89) | |
| 8Wk | 0.34 (−1.08, 1.76) | 0.33 (−1.13, 1.79) | |
| 1Yr | −0.40 (−1.85, 1.05) | −0.48 (−1.97, 1.02) | |
| O3 | 1Wk | 0.25 (−0.67, 1.17) | 0.30 (−0.66, 1.25) |
| 4Wk | −0.09 (−1.14, 0.96) | −0.02 (−1.11, 1.06) | |
| 8Wk | −0.14 (−1.24, 0.96) | −0.09 (−1.23, 1.05) | |
| 1Yr | 0.36 (−0.82, 1.53) | 0.42 (−0.80, 1.63) | |
| PM2.5 | 1Wk | −0.24 (−0.94, 0.45) | −0.22 (−0.94, 0.50) |
| 4Wk | 0.07 (−0.82, 0.95) | 0.06 (−0.85, 0.97) | |
| 8Wk | 0.28 (−0.61, 1.17) | 0.22 (−0.70, 1.15) | |
| 1Yr | −0.13 (−1.71, 1.44) | −0.14 (−1.79, 1.50) |
1Wk, 4Wk, 8Wk and 1Yr means for the exposure windows of average 1 week, 4 weeks, 8 weeks and one year prior to the visit date;
Difference in the scores per Interquartile Increase of Exposures of Interest (NO2 – ppb, O3 - ppb, PM2.5 - μg/m3);
Model I was adjusted for co-exposures, temperature (except for 1 Yr window), relative humidity, calendar year, age, bmi, race (Caucasian or not), education, marital status, season, census tract median household income, census tract median value of house, census tract population density;
Model II was adjusted for the covariates adjusted in Model I plus physical activity (using total metabolic equivalent of task (hours/week)), smoking and drinking.