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Table 5 Multivariate logistic regression analysis ofinsomnia and noise-related variables, adjusted forsociodemographic and medical illness factors

From: Noise sensitivity, rather than noise level, predicts the non-auditory effects of noise in community samples: a population-based survey

  Model 1 Model 2 Model 3
  OR (95% CI) p-value aOR a (95% CI) p-value aOR b (95% CI) p-value
Noise-related variables       
Noise exposure (reference: Ldn < 55) 1 0.295 1 0.51 1 0.519
55 ≤ Ldn < 65 0.95 (0.64–1.43) 0.811 1.08 (0.71–1.63) 0.725 1.14 (0.75–1.74) 0.529
Ldn ≥65 0.67 (0.4–1.11) 0.122 0.78 (0.46–1.31) 0.346 0.83 (0.49–1.4) 0.481
Noise sensitivity 2.02 (1.41–2.91) <0.001 2.08 (1.43–3.03) <0.001 2.08 (1.43–3.04) <0.001
Demographic variables       
Age    1.01 (0.99–1.03) 0.24 1 (0.99–1.02) 0.642
Sex (reference: male)    1.46 (0.96–2.2) 0.074 1.43 (0.94–2.17) 0.093
Education level (reference:<12 y)    1.02 (0.65–1.62) 0.92 1.08 (0.68–1.72) 0.75
Marital status (reference: single)    1 0.154 1 0.143
married    0.72 (0.39–1.31) 0.284 0.74 (0.4–1.36) 0.329
separated/divorced/bereaved    1.11 (0.52–2.37) 0.785 1.17 (0.54–2.53) 0.685
Income(reference:<3000 USD)    0.48 (0.32–0.74) 0.001 0.48 (0.31–0.74) 0.001
Medical Illnesses       
Hypertension (reference: “no”)      1.04 (0.60–1.80) 0.900
Hyperlipidemia (reference: “no”)      1.35 (0.69–2.65) 0.385
Diabetes mellitus (reference: “no”)      2.18 (1.12–3.98) 0.011
Residence period (y) 1.01 (1–1.03) 0.135 1.01 (0.99–1.03) 0.539 1.01 (0.99–1.03) 0.521
  1. Abbreviations: aOR adjusted odds ratio, CI confidence interval, Ldn day-night equivalent sound level, NS noise sensitivity, OR odds ratio, USD U.S. dollars
  2. Model 1 included noise-related variables (noise exposure and NS) and residence period (OR). Model 2 included model 1 plus demographic and socioeconomic variables (aOR a). Model 3 included model 2 plus medical illnesses (aOR b). Significant values are highlighted in bold