Table 2. ORs (95% CIs) for hearing lossa by earphone use time (n = 1,036).
| Variables | No. with hearing loss / no. of participants | (%) | Model Ab | Model Bc | Model Cd | |
|---|---|---|---|---|---|---|
| Earphone using time | ||||||
| Per 1 hour increasing of using time | 1.18 (1.01, 1.39) | 1.14 (0.97, 1.35) | 1.19 (1.01, 1.41) | |||
| Using time quintiles (min) | ||||||
| Q1 (1–25) | 15/185 | (8.1) | Ref. | Ref. | Ref. | |
| Q2 (30–50) | 22/242 | (9.1) | 0.57 (0.23, 1.41) | 0.57 (0.23, 1.45) | 0.59 (0.16, 2.13) | |
| Q3 (60–60) | 22/301 | (7.3) | 0.81 (0.34, 1.89) | 0.81 (0.35, 1.90) | 1.09 (0.53, 2.21) | |
| Q4 (70–120) | 19/179 | (10.6) | 1.71 (0.64, 4.57) | 1.66 (0.61, 4.51) | 2.25 (0.97, 5.20) | |
| Q5 (150–720) | 21/130 | (16.2) | 2.04 (0.84, 4.92) | 1.86 (0.75, 4.57) | 2.71 (1.31, 5.61) | |
| p for trend | 0.015 | 0.025 | 0.006 | |||
aHearing loss was defined as pure-tone average ≥ 25 dB.
bModel A was adjusted for age, sex, monthly income, education level, smoking status, BMI, and blood lead.
cModel B was adjusted for all variables included in model A and further adjusted for occupational noise, loud noise, and firearm noise.
dModel C was adjusted for all variables included in model B and further adjusted for hypertension and diabetes.