TABLE 2.

Medians of TEOAE total power and TEOAE powers at various frequencies and DPOAE Average power and DPOAE powers at various frequencies (dB SPL) in ears of adolescents grouped into tertiles with regard to sum of PCBs serum concentration.

TEOAE					DPOAE
Power	Gender	Tertile	Left Ears	Right Ears	Power	Gender	Tertile	Left Ears	Right Ears
Total	Boys	1.	13.15	12.8	Average power	Boys	1.	11.1	10.55
		2.	12.8	13.9			2.	11.05	11.2
		3.	12.4	13.8			3.	10.15	11.4
	Girls	1.	13.3	14.15		Girls	1.	11.65	11.7
		2.	13.3	13.6			2.	10.55	11.75
		3.	13.5	13.7			3.	11.0	11.4
At 1000 Hz	Boys	1.	1.2	1.7	At 1000 Hz	Boys	1.	5.6	7.4
		2.	0.2	1.35			2.	6.3	5.95
		3.	−3.0	0.15			3.	−2.5	1.6
	Girls	1.	1.9	1.5		Girls	1.	6.4	6.4
		2.	−0.05	0.0			2.	2.8	6.05
		3.	−0.9	−0.3			3.	−2.9	2.35
At 1500 Hz	Boys	1.	7.95	6.6
		2.	6.2	7.15
		3.	6.5	8.1
	Girls	1.	7.5	7.95
		2.	7.3	7.85
		3.	5.6	7.8
At 2000 Hz	Boys	1.	4.65	5.1	At 2000 Hz	Boys	1.	8.95	9.0
		2.	5.4	5.4			2.	9.8	10.7
		3.	4.7	6.85			3.	7.0	8.8
	Girls	1.	6.1	7.0		Girls	1.	9.8	9.6
		2.	7.2	5.95			2.	5.8	8.45
		3.	5.6	7.0			3.	9.0	9.8
At 3000 Hz	Boys	1.	5.8	5.5
		2.	5.6	5.2
		3.	6.0	6.35
	Girls	1.	6.1	6.8
		2.	7.5	6.6
		3.	7.5	7.7
At 4000 Hz	Boys	1.	1.45	3.4	At 4000 Hz	Boys	1.	9.7	9.25
		2.	2.5	3.5			2.	9.7	9.95
		3.	1.0	1.55			3.	10.2	11.5
	Girls	1.	3.5	2.8		Girls	1.	10.95	11.25
		2.	3.3	2.5			2.	10.8	10.4
		3.	3.4	3.0			3.	9.8	10.1