Table 3. Hearing Threshold according to CHHF Status

		NCHHF	CHHF	Total	P value
Right	0.5 ㎑ (㏈)	14.33 ±0.19	15.00±0.38	14.47±0.19	0.063
	1 ㎑ (㏈)	11.97±0.19	12.48±0.37	12.07±0.19	0.146
	2 ㎑ (㏈)	14.21±0.20	14.83±0.38	14.34±0.19	0.112
	3 ㎑ (㏈)	17.53± 0.27	16.87± 0.46	17.40±0.25	0.164
	4 ㎑ (㏈)	22.28±0.29	19.53±0.46	21.71±0.27	< 0.001
	6 ㎑ (㏈)	31.34±0.33	30.04±0.54	31.07±0.32	0.015
	Mean (㏈)	14.51±0.19	14.79±0.37	14.57±0.19	0.428
Left	0.5 ㎑ (㏈)	15.25±0.19	15.80±0.36	15.37±0.19	0.105
	1 ㎑ (㏈)	11.41±0.19	11.68±0.36	11.46±0.19	0.441
	2 ㎑ (㏈)	14.43±0.21	14.84±0.40	14.51±0.20	0.301
	3 ㎑ (㏈)	18.37± 0.26	17.31±0.47	18.15±0.25	0.027
	4 ㎑ (㏈)	22.93±0.29	20.18±0.53	22.35±0.27	< 0.001
	6 ㎑ (㏈)	32.76±0.35	31.24±0.60	32.44±0.33	0.013
	Mean (㏈)	14.87±0.19	14.91±0.37	14.87±0.19	0.909
Unilateral hearing loss		930 (5.9)	289 (6.6)	1219 (6.0)	0.158
Bilateral hearing loss		587 (3.1)	198 (3.8)	785 (3.3)	0.052

Values are given as weighted mean ± standard error or unweighted number (weighted percentage). P values were analyzed using weighted two-sample t-test for continuous variables and Rao-Scott chi-square test for nominal variables. NCHHF: non-cold hypersensitivity in the hands and feet, CHHF: cold hypersensitivity in the hands and feet