Table 2. Characteristics of the subjects enrolled in microarray analysis and PCR experiments.

Sample characteristic	Exposure	NIHL	P
Number	10	10	–
Sex (male/female)	10/0	10/0	–
Age, mean (SD)	43.6 (5.3)	44.0 (5.3)	0.868a
Smoking, yes/no (% yes)	7/3 (70.0%)	9/1 (90.0%)	0.582b
drinking, yes/no (% yes)	8/2 (80.0%)	9/1 (90.0%)	1.000b
Exposure years, mean (SD)	20.1 (6.5)	19.5 (7.0)	0.844a
Noise intensity, mean (SD)	89.4 (2.3)	88.7 (3.3)	0.619a

^a, two-sided t-tests; ^b, two-sided χ² tests.