Table 1.
The results of the regression analysis where the toxicological responses were predicted with the principal components (PC)
| Indoor air | Predictors | B-value | Std. Error | P-value | R Square |
|---|---|---|---|---|---|
| MTT | PC1 | 23.200 | 7.540 | .012 | .486 |
| PI | PC1 | 25.545 | 7.361 | ||
| PC3 | −16.478 | 5.672 | .027 | .663 | |
| PC4 | .002 | .001 | |||
| SubG1 | PC2 | 3.790 | 1.965 | .083 | .271 |
| TNF-α | PC1 | 2361.993 | 528.044 | .002 | .754 |
| PC2 | −1030.431 | 320.505 | |||
| MIP-2 | PC1 | 13903.703 | 4714.166 | .007 | .672 |
| PC2 | −6730.010 | 2861.338 | |||
| Outdoor air | |||||
| MTT | PC2 | 4.983 | 3.545 | .010 | .733 |
| PC4 | .002 | .001 | |||
| PI | PC2 | 1.718 | 1.538 | .013 | .708 |
| PC4 | .001 | .000 | |||
| SubG1 | PC1 | −4.451 | 1.108 | .037 | .829 |
| PC2 | −1.273 | .748 | |||
| PC3 | 7.641 | 2.024 | |||
| PC4 | .000 | .000 | |||
| TNF-α | PC1 | 129.943 | 323.975 | .000 | .955 |
| PC4 | .642 | .063 | |||
| MIP-2 | PC1 | 8471.839 | 3498.369 | .000 | .577 |
| PC4 | 1.783 | .601 |
Columns in the table show independent predictors for each dependent, regression coefficient (B) and its standard error, significance of the total model (p-value) and the coefficient of determination (R2), respectively. Indoor (n = 18) and outdoor air (n = 15) were tested separately.