Table 4.
Factor pattern for 8 independent variables, representing weightings of each congener, for all PBDE congeners detected in house dust.
| Factor 1 | Factor 2 | Factor 3 | Factor 4 | Factor 5 | Factor 6 | Factor 7 | Factor 8 | |
|---|---|---|---|---|---|---|---|---|
| BDE 17 | 0.61921 | −0.27052 | 0.19168 | 0.17357 | −0.41984 | −0.04351 | 0.33098 | −0.07932 |
| BDE 25 | 0.19201 | −0.36883 | −0.12747 | 0.39082 | −0.30498 | −0.46457 | −0.01396 | 0.49010 |
| BDE 28/33 | 0.81550 | −0.38798 | 0.06208 | 0.07015 | −0.03569 | 0.07351 | −0.06067 | −0.07033 |
| BDE 30 | −0.13225 | −0.02905 | 0.20550 | −0.53665 | 0.12428 | −0.28102 | 0.68385 | 0.01557 |
| BDE 47 | 0.95770 | −0.21810 | 0.02513 | 0.01519 | −0.00523 | 0.04297 | −0.00737 | −0.08296 |
| BDE 49 | 0.42602 | −0.00713 | 0.15241 | −0.25128 | −0.50311 | 0.52132 | 0.07574 | 0.15202 |
| BDE 66 | 0.73432 | −0.32019 | 0.08162 | 0.18837 | −0.29711 | 0.08202 | 0.20863 | −0.16743 |
| BDE 75 | 0.23279 | −0.28282 | 0.03633 | 0.49519 | 0.36456 | 0.55011 | 0.15913 | −0.17713 |
| BDE 85/155 | 0.96164 | −0.17075 | 0.02102 | −0.06266 | 0.03537 | −0.10549 | −0.07274 | −0.01817 |
| BDE 99 | 0.96213 | −0.21373 | 0.04277 | −0.03854 | −0.00481 | −0.08907 | −0.02396 | −0.03014 |
| BDE 100 | 0.97057 | −0.17617 | 0.00468 | −0.06570 | 0.04365 | −0.07927 | −0.07759 | −0.02223 |
| BDE 138 | 0.38529 | −0.17239 | 0.54641 | −0.17250 | 0.36090 | 0.23085 | −0.26340 | 0.15432 |
| BDE 153 | 0.95584 | −0.14743 | −0.06018 | −0.08995 | 0.03895 | −0.11845 | −0.05213 | 0.02262 |
| BDE 154 | 0.84431 | −0.01778 | −0.07175 | −0.22286 | 0.24656 | −0.19706 | −0.22573 | 0.13240 |
| BDE 183 | 0.53488 | 0.19800 | −0.77153 | −0.11729 | 0.11291 | 0.00159 | −0.03000 | −0.03953 |
| BDE 201 | 0.43644 | 0.42526 | −0.73047 | −0.00085 | 0.09663 | −0.00121 | −0.00375 | −0.10207 |
| BDE 202 | 0.40385 | 0.63789 | −0.02366 | −0.06827 | 0.06280 | −0.17517 | 0.17920 | −0.29929 |
| BDE 203/200 | 0.06711 | 0.61525 | −0.46298 | 0.28807 | −0.22872 | 0.26425 | 0.08367 | 0.23107 |
| BDE 205 | 0.13333 | −0.01979 | 0.18782 | 0.66479 | 0.46476 | −0.23387 | 0.27388 | 0.09357 |
| BDE 206 | 0.30397 | 0.85720 | 0.31233 | 0.08345 | −0.05574 | −0.05673 | −0.03512 | −0.00946 |
| BDE 207 | 0.40369 | 0.87831 | 0.12270 | 0.10306 | −0.05670 | −0.06045 | 0.02305 | −0.06370 |
| BDE 208 | 0.35133 | 0.84867 | 0.31784 | 0.10512 | −0.07158 | −0.04356 | 0.02223 | −0.04902 |
| BDE 209 | 0.31736 | 0.76528 | 0.42895 | 0.02329 | −0.00433 | 0.02991 | −0.17121 | 0.20390 |
| Variability a | 0.3631 | 0.5547 | 0.6483 | 0.7123 | 0.7695 | 0.8234 | 0.8691 | 0.9025 |
a
Cumulative proportions of the variability explained by each factor, as determined by eigenvalues of the correlation matrix from the factor analysis. Eight factors account for 90 percent of the variability of all congeners.
Bolding indicates which congeners are weighted more heavily. Factor 1 is weighted most by PentaBDE congeners and Factor 2 is weighted most by DecaBDE congeners.