Effect of NPAH Exposure on Lung Function of Children in Indoor Coal Combustion Environment

Table 2

Rotated component matrix of NPAHs in the particulate phases.

Principal components	Heating season		Nonheating season
	1	2	1	2	3
1N-NAP	0.145	-0.689	0.951	0.008	0.084
2N-NAP	0.184	-0.758	0.959	0.044	0.153
5N-ACE	0.790	0.431	—	—	—
2N-FLO	0.960	-0.070	0.981	0.075	0.007
9N-ANT	0.522	0.780	0.916	0.309	0.194
9N-PHE	0.953	0.108	0.977	0.072	-0.058
3N-PHE	0.986	0.124	0.235	0.574	-0.383
2+3N-FLA	0.429	0.617	0.251	0.902	0.091
1N-PYR	0.516	0.735	0.197	0.015	0.927
7N-BaA	0.551	0.748	-0.158	0.934	0.040
6N-CHR	0.894	0.109	—	—	—
6N-BaP	0.145	-0.689	—	—	—
Estimated sources	Coal	Diesel and biomass	Coal	Biomass	Diesel
Variance (%)	58.2	20.7	55.4	21.8	11.3