From: Road traffic noise frequency and prevalent hypertension in Taichung, Taiwan: A cross-sectional study
Characteristics | Case group (n = 46) | Control group (n = 774) | Total subjects (n = 820) | P-value |
---|---|---|---|---|
LAeq 8 h (dBA) | ||||
Median (Q1, Q3) | 81 (79, 82) | 79 (77, 82) | 79 (77, 82) | 0.016a |
Frequency components | ||||
31.5 Hz (dB) | ||||
Median (Q1, Q3) | 29 (26, 31) | 27 (25, 30) | 27 (25, 30) | 0.222a |
63 Hz (dB) | ||||
Median (Q1, Q3) | 43 (41, 45) | 41 (38, 44) | 41 (38, 44) | 0.026a |
125 Hz (dB) | ||||
Median (Q1, Q3) | 50 (48, 52) | 49 (47, 51) | 49 (47, 51) | 0.032a |
250 Hz (dB) | ||||
Median (Q1, Q3) | 55 (53, 56) | 54 (52, 55) | 54 (53, 55) | 0.017a |
500 Hz (dB) | ||||
Median (Q1, Q3) | 58 (57, 60) | 58 (56, 59) | 58 (56, 59) | 0.032a |
1000 Hz (dB) | ||||
Median (Q1, Q3) | 61 (60, 63) | 61 (59, 63) | 61 (59, 63) | 0.070a |
2000 Hz (dB) | ||||
Median (Q1, Q3) | 59 (57, 61) | 59 (57, 61) | 59 (57, 61) | 0.120a |
4000 Hz (dB) | ||||
Median (Q1, Q3) | 57 (54, 58) | 56 (53, 59) | 56 (53, 59) | 0.458a |
8000 Hz (dB) | ||||
Median (Q1, Q3) | 50 (48, 52) | 49 (45, 52) | 49 (45, 52) | 0.096a |