Table 2.

Relationship among earphone use habits and hearing loss, hierarchical logistic regression model: pOR (95% CI).

Characteristics	Crude model	Model 1	Model 2
Experience of using earphones in a noisy environment
No	1	1	1
Yes	4.16 (1.47, 11.73)∗∗	4.82 (1.46, 15.89)∗∗	4.54 (1.35, 15.24)∗
Mean daily earphone usage
<80 min	1	1	1
≥80 min	5.88 (1.40, 24.70)∗	5.18 (1.21, 22.02)∗	4.68 (1.08, 20.22)∗
Exposed to the noise of living environment ≥3 mo
No	1	1	1
Yes	0.95 (0.53, 1.70)	0.87 (0.47, 1.63)	0.80 (0.42, 1.51)
Momentary exposure to noise such as explosion
No	1	1	1
Yes	0.73 (0.45, 1.18)	0.69 (0.41, 1.17)	0.62 (0.36, 1.05)