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Model summaries for regression models relating PCE in exhaled breath to PCE TWA |
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| Model |
Intercept |
Day |
Body mass index |
ln (PCE TWA) |
≈ R2 |
|
|
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| Same day post-shift (34 observations on 18 workers) |
-0.46 ± 0.53 (0.40)a |
-b |
0.042 ± 0.018 (0.036) |
0.52 ± 0.082 (<0.0001) |
61% |
| Next day pre-shift (35 observations on 18 workers) |
-0.42 ± 0.35 (0.25) |
0.15 ± 0.051 (0.011) |
0.028 ± 0.012 (0.038) |
0.15 ± 0.045 (0.0032) |
47% |
| Next day post-shift (28 observations on 18 workers) |
-0.36 ± 0.72 (0.62) |
-b |
0.047 ± 0.025 (0.082) |
0.66 ± 0.12 (<0.0001) |
63% |
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R2, the percent of variance explained by the fixed effects in the model, is estimated by 1 – (estimated total variance for full model/estimated total variance for reduced model), where the reduced model contains only the intercept. a estimate ± standard error (P-value) b day effect was not significant and was excluded from the model | |||||
McKernan et al. Environmental Health 2008 7:12 doi:10.1186/1476-069X-7-12 |
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