Models and covariates | Percent predicted FEV1 | Â | Severity of Asthma Score | ||||
---|---|---|---|---|---|---|---|
 | β | se | p |  | β | se | p |
Sociodemographics and behavioral characteristics | Â | Â | Â | Â | Â | Â | |
   Age (years) | -0.56 | 0.15 | <0.001 |  | 0.10 | 0.05 | 0.03 |
   High school education or less | -9.25 | 3.67 | 0.01 |  |  |  |  |
   Not employed | -4.48 | 3.14 | 0.16 |  | 1.75 | 1.05 | 0.10 |
   Currently employed, VGDF (ref: employed, no VGDF) | -0.74 | 2.83 | 0.80 |  | 1.75 | 0.91 | 0.06 |
   Light smoker (<10 pack years) | 1.01 | 3.03 | 0.74 |  |  |  |  |
   Heavy smoker (≥10 pack years) (ref: never smoked) | 3.76 | 4.40 | 0.39 |  |  |  |  |
Adj. R2 (cumulative) | 0.12 * | Â | 0.07 * | ||||
Household biologics and antigen-antibody status | Â | Â | Â | Â | Â | Â | |
   Total dust wt bedroom (per 100 g) | -2.23 | 0.58 | <0.001 |  |  |  |  |
   Dog owner |  |  |  |  | 0.80 | 0.85 | 0.34 |
   Elevated anti-Can f1 specific IgE | -9.79 | 3.28 | 0.003 |  | 2.81 | 1.08 | 0.01 |
Adj. R2 (cumulative) | 0.22 * | Â | 0.10 * | ||||
Indoor air quality | Â | Â | Â | Â | Â | Â | Â |
   Wall dampness, % moisture |  |  |  |  | -0.23 | 0.16 | 0.17 |
   Any houseplants |  |  |  |  | -1.52 | 1.10 | 0.17 |
   Air filter in home | -2.89 | 2.76 | 0.30 |  | 1.95 | 0.89 | 0.03 |
   Coal/wood heat (vs. electric or gas) | 1.31 | 3.82 | 0.73 |  | -1.82 | 1.23 | 0.14 |
Adj. R2 (cumulative) | 0.21 | Â | 0.14 * | ||||
Metals in BR dust (upper quartile) | Â | Â | Â | Â | Â | Â | Â |
   Copper |  |  |  |  | -1.84 | 1.04 | 0.08 |
   Iron |  |  |  |  | -1.67 | 0.95 | 0.08 |
   Magnesium | 4.40 | 2.85 | 0.13 |  |  |  |  |
   Zinc |  |  |  |  | 1.26 | 1.05 | 0.23 |
Adj. R2 (cumulative) | 0.21 | Â | 0.17 * | ||||
External environment | Â | Â | Â | Â | Â | Â | Â |
   Census Block Group Factors |  |  |  |  |  |  |  |
Factor 1: Poor (working/unemployed) | Â | Â | Â | Â | 0.36 | 0.39 | 0.35 |
Factor 2: Suburban homeowners | -4.38 | 1.53 | 0.005 | Â | Â | Â | Â |
   Distance (m) to nearest road | 0.28 | 0.08 | <0.001 |  | -0.02 | 0.03 | 0.41 |
   Urban/built environment | 5.23 | 3.30 | 0.11 |  | -1.44 | 1.03 | 0.16 |
   Air Quality Factor 2: Higher NO2, summer wind speed, and winter temperature; lower winter wind speed | -2.11 | 0.93 | 0.03 |  | 0.28 | 0.30 | 0.36 |
Adj. R2 (full model) | 0.30 * | Â | 0.16 |