Skip to main content

Advertisement

Table 4 Associations between hypertension and categorical exposure of traffic road noise stratified by different frequency components

From: Road traffic noise frequency and prevalent hypertension in Taichung, Taiwan: A cross-sectional study

Frequency component Categorical exposure Median Model 1a Model 2b Model 3c Model 4d Model 5e
OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI)
31.5 Hz HEG vs. LEG 27 dB 1.33 (0.73-2.43) 1.17 (0.61-2.27) 1.08 (0.55-2.12) 0.52 (0.22-1.21) 1.05 (0.52-2.12)
63 Hz HEG vs. LEG 41 dB 1.82 (0.97-3.42) 2.20 (1.10-4.39)f 2.14 (1.06-4.31)f 1.19 (0.41-3.43) 2.77 (1.17-6.52)f
125 Hz HEG vs. LEG 49 dB 2.09 (1.08-4.02)f 2.53 (1.24-5.18)f 2.51 (1.21-5.21)f 1.73 (0.67-4.49) 4.08 (1.57-10.63)f
250 Hz HEG vs. LEG 54 dB 1.48 (0.80-2.74) 1.56 (0.79-3.05) 1.50 (0.75-2.98) 0.70 (0.27-1.78) 1.52 (0.73-3.16)
500 Hz HEG vs. LEG 58 dB 1.32 (0.73-2.39) 1.42 (0.73-2.75) 1.36 (0.69-2.67) 0.72 (0.31-1.67) 1.34 (0.68-2.66)
1000 Hz HEG vs. LEG 61 dB 1.73 (0.95-3.15) 2.08 (1.06-4.06)f 1.99 (1.01-3.93)f 1.40 (0.64-3.05) 1.98 (1.00-3.92)f
2000 Hz HEG vs. LEG 59 dB 1.52 (0.84-2.76) 1.76 (0.91-3.41) 1.73 (0.89-3.39) 1.17 (0.54-2.56) 1.73 (0.87-3.43)
4000 Hz HEG vs. LEG 56 dB 1.67 (0.88-3.18) 1.75 (0.87-3.51) 1.74 (0.85-3.56) 1.22 (0.55-2.71) 1.73 (0.84-3.57)
8000 Hz HEG vs. LEG 49 dB 1.63 (0.88-3.01) 1.68 (0.86-3.29) 1.71 (0.86-3.39) 1.52 (0.75-3.04) 1.72 (0.87-3.42)
  1. dB = decibel; HEG = high exposure group (≥ the median); LEG = low exposure group (< the median); OR = odds ratio; 95% CI = 95% confidence interval. aSimple logistic regression model. bMultiple logistic regression models adjusted for significant factors between the case and control groups (such as age, gender, body mass index and family history of hypertension). cMultiple logistic regression models adjusted for all variables in model 2 and important risk factors of hypertension identified in the literature (i.e., current smoking, alcohol consumption, salt intake and physical inactivity). dModel 3 adjusted for the total noise exposure. eModel 3 adjusted for the total traffic flow rate. f P < 0.050.