Table 5. PTA and SD of the Right ear by age

Left	Age	16	17	18	19	20	21	22	Kruskal-Wallis test		Total
	n	11	55	70	12	14	8	5	H-statistic	p-value	175
Frequency(Hz)	250	7.27±4.45	6.55±5.21	7.71±4.91	10.00±6.03	8.57±4.97	5.63±5.63	7.00±2.74	5.4512	0.4874	7.44±5.08
	500	3.64±2.23	5.27±4.51	6.21±4.00	7.50±5.44	5.74±5.14	5.00±4.63	6.00±2.24	7.3927	0.2860	5.74±4.30
	1,000	5.91±4.17	6.09±4.12	6.64±3.66	6.25±2.26	6.43±3.06	6.25±3.54	5.00±0.00	1.8213	0.9354	6.31±3.65
	2,000	6.82±3.86	5.82±4.65	6.07±3.77	7.50±3.37	6.43±4.13	8.13±6.51	7.00±2.74	2.9857	0.8106	6.28±4.19
	3,000	5.91±4.17	5.45±4.79	6.00±3.93	4.58±3.96	7.50±4.70	5.63±4.96	4.00±2.24	4.4424	0.6170	5.80±4.32
	4,000	7.73±6.17	5.64±5.14	6.50±4.73	7.08±5.42	8.21±6.68	5.63±4.17	6.00±2.24	4.5837	0.5982	6.42±5.11
Kruskal-Wallis test	H-Statistic	5.6583	2.7669	7.0892	7.3898	4.9984	1.5549	6.2333	-	-	-
	p-value	0.3409	0.7359	0.2141	0.1932	0.4161	0.9066	0.2842	-	-	-
	6 PTAs	6.14±2.96	5.79±3.35	6.36±2.79	7.01±2.65	6.61±3.50	6.56±3.76	6.00±1.37	-	-	6.22±3.04

PTA: pure tone threshold average, SD: standard deviation, 6PTAs: 6 pure tone threshold averages.