Single-Nucleotide Polymorphisms in XPO5 are Associated with Noise-Induced Hearing Loss in a Chinese Population

Table 1

Demographic characteristics and clinical features.

Variables	Cases (n = 1040)		Controls (n = 1060)
	n	%	n	%
Age (years), mean ± SD	39.50 ± 8.52		39.27 ± 8.34		0.537
Sex					0.074
Male	978	94.04	980	92.45
Female	62	5.96	80	7.55
Smoking					0.448
Now	533	52.46	515	49.71
Ever	68	6.69	76	7.34
Never	415	40.85	445	42.95
Drinking					0.374
Now	229	22.76	265	25.33
Ever	214	21.27	221	21.13
Never	563	55.96	560	53.54
Work time with noise (years), mean ± SD	16.91 ± 9.57		16.64 ± 9.23		0.511
Exposure level with noise (dB), mean ± SD	87.55 ± 14.98		86.89 ± 15.74		0.325
High-frequency hearing threshold (dB), mean ± SD	40.73 ± 13.40		16.63 ± 4.75		<0.001