Table 3.

Relationship between earphone usage habits in a noisy environment and reporting of subjective hearing problems, hierarchical logistic regression model: pOR (95% CI).

Characteristics	Crude model	Model 1	Model 2
Earphone use
No	1	1	1
Yes	5.88 (1.40, 24.59)∗	9.24 (1.25, 68.38)∗	8.39 (1.12, 62.83)∗
Mean daily earphone usage in a noisy environment
<80 min	1	1	1
≥80 min	Na	Na	Na
Exposed to the noise of living environment ≥3 mo
No	1	1	1
Yes	0.72 (0.38, 1.34)	0.68 (0.34, 1.32)	0.71 (0.35, 1.44)
Momentary exposure to noise such as explosion
No	1	1	1
Yes	0.81 (0.46, 1.42)	0.81 (0.44, 1.50)	0.87 (0.45, 1.67)