Skip to main content

Table 1 General characteristics and Insomnia Severity Index (ISI)/Epworth Sleepiness Scale (ESS) results by noise exposure groups

From: The effect of aircraft noise on sleep disturbance among the residents near a civilian airport: a cross-sectional study

Characteristics   All groups Control Low-exposure (75-80 WECPNL) High-exposure (80-90 WECPNL) p-value
n = 3308(%) n = 477(%) n = 1403(%) N = 1428(%)
Sexa) Male 1111(33.6) 153(32.1) 443(31.6) 515(36.1) 0.0308
Female 2197(66.4) 324(67.9) 960(68.4) 913(63.9)  
Mean age(years)b)   50.5 ± 14.2 50.5 ± 14.4 50.6 ± 14.1 50.4 ± 14.2 0.9116
Age(years)a) 20-29 268(8.1) 44(9.2) 110(7.8) 114(8.0) 0.4197
30-39 585(17.7) 81(17.0) 240(17.1) 264(18.5)  
40-49 656(19.8) 77(16.1) 300(21.4) 279(19.5)  
50-59 739(22.3) 121(25.4) 297(21.2) 321(22.5)  
60-69 764(23.1) 108(22.6) 330(23.5) 326(22.8)  
70-74 296(9.0) 46(9.6) 126(9.0) 124(8.7)  
Educationa) Never 77(2.3) 4(0.8) 26(1.8) 47(3.3) <0.0001
Elementary school 343(10.4) 28(5.9) 134(9.6) 181(12.7)  
Middle school 512(15.5) 57(11.9) 242(17.3) 213(14.9)  
High school 1407(42.5) 225(47.2) 552(39.3) 630(44.1)  
College or more 969(29.3) 163(34.2) 449(32.0) 357(25.0)  
Residency period(year)a) ≥15 826(28.7) 86(20.3) 382(31.4) 358(29.0) <0.0001
10-14 655(22.8) 120(28.4) 287(23.6) 248(20.1)  
5-9 679(23.6) 101(23.9) 260(21.4) 318(25.7)  
<5 716(24.9) 116(27.4) 288(23.7) 312(25.2)  
Drinkinga) No 2055(62.1) 284(59.5) 906(64.6) 865(60.6) 0.0408
Yes 1253(37.9) 193(40.5) 497(35.4) 563(39.4)  
Smokinga) Never 2546(77.4) 369(77.4) 1102(78.5) 1075(75.3) 0.2182
Past smoker 273(8.2) 43(9.0) 101(7.2) 129(9.0)  
Current smoker 489(14.8) 65(13.6) 200(14.3) 224(15.7)  
Regular Exercisea) No 1793(54.2) 234(49.1) 782(55.7) 777(54.4) 0.0398
Yes 1515(45.8) 243(50.9) 621(44.3) 651(45.6)  
Operation or hospitalization within 1 yeara) No 3025(91.4) 446(93.5) 1296(92.4) 1283(89.9) 0.0123
Yes 283(8.6) 31(6.5) 107(7.6) 145(10.1)  
ISIc) Meanb) 6.9 ± 6.4 4.1 ± 5.1 7.2 ± 6.5 7.6 ± 6.4 <0.0001
Normal 1956(59.1) 376(78.8) 782(55.7) 798(55.9) <0.0001
Sub-threshold insomnia 897(27.1) 75(15.7) 426(30.4) 396(27.7)  
Moderate insomnia 382(11.6) 25(5.2) 155(11.1) 202(14.2)  
Severe insomnia 73(2.2) 1(0.2) 40(2.8) 32(2.2)  
ESSc) Meanb) 5.5 ± 3.7 4.1 ± 3.0 5.4 ± 3.7 6.0 ± 3.8 <0.0001
Normal 2853(86.2) 451(94.5) 1214(86.5) 1188(83.2) <0.0001
Daytime hypersomnia 455(13.8) 26(5.5) 189(13.5) 240(16.8)  
  1. a)By Chi-square test
  2. b)By ANOVA
  3. c)By Mantel-Haenszel Chi-square test