Role of microbial and chemical composition in toxicological properties of indoor and outdoor air particulate matter

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	.002	.754
MIP-2	PC1	13903.703	4714.166	.007	.672
	PC2	−6730.010	2861.338	.007	.672
Outdoor air
MTT	PC2	4.983	3.545	.010	.733
	PC4	.002	.001	.010	.733
PI	PC2	1.718	1.538	.013	.708
	PC4	.001	.000	.013	.708
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	.000	.955
MIP-2	PC1	8471.839	3498.369	.000	.577
	PC4	1.783	.601	.000	.577

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.

ISSN: 1743-8977