Table 3

OR (95% CI) of specific HL according to sleep duration or noise exposure stratified by sex

	Sleep duration (≥8 vs 6–8 hours/night)			Noise at work (yes vs no)			Noise off-work (yes vs no)
End points	Male	Female	P interaction	Male	Female	P interaction	Male	Female	P interaction
Chinese
LFHL	0.83 (0.66 to 1.04)	1.02 (0.81 to 1.28)	0.445	1.77 (1.45 to 2.17)*	1.41 (1.14 to 1.75)*	<0.001	1.59 (1.28 to 1.98)*	1.31 (1.03 to 1.66)*	0.011
SFHL	0.89 (0.70 to 1.13)	0.97 (0.77 to 1.22)	<0.001	1.69 (1.37 to 2.08)*	1.60 (1.29 to 1.99)*	0.248	1.33 (1.06 to 1.68)*	1.27 (1.00 to 1.62)	0.150
HFHL	0.59 (0.45 to 0.76)*	0.81 (0.64 to 1.02)	<0.001	1.20 (0.96 to 1.50)	1.57 (1.26 to 1.95)*	0.003	1.15 (0.90 to 1.48)	1.32 (1.03 to 1.69)*	<0.001
American
LFHL	1.15 (0.73 to 1.82)	0.85 (0.54 to 1.32)	0.958	1.35 (0.90 to 2.01)	1.02 (0.59 to 1.78)	0.368	0.68 (0.38 to 1.23)	1.77 (0.85 to 3.67)	0.290
SFHL	1.04 (0.72 to 1.49)	0.99 (0.66 to 1.48)	<0.001	1.63 (1.19 to 2.24)*	1.01 (0.61 to 1.69)	0.238	1.20 (0.80 to 1.80)	1.89 (0.98 to 3.68)	<0.001
HFHL	1.13 (0.83 to 1.54)	1.42 (1.05 to 1.92)*	<0.001	1.44 (1.09 to 1.90)*	1.40 (0.95 to 2.05)	<0.001	1.47 (1.04 to 2.07)*	2.35 (1.37 to 4.02)*	<0.001

The binary logistic regression model adjusted for age, sex, marriage status and education level. Male or female participants without the corresponding noise or 6 ≤sleep duration <8 hours/night were considered the reference group.
The p_interaction were estimated by including an interaction term beta of the sleep duration/noise-sex in full binary logistic regression model.
*P values <0.05 were considered statistically significant and maintains significance after the Benjamini-Hochberg procedure with a false discovery rate at 0.12 concerning all the 36 tests.
LFHL, low-frequency hearing loss; SFHL, speech-frequency hearing loss; HFHL, high-frequency hearing loss.