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Table 2 Characteristics of population by occupational and environmental noise

From: Are occupational and environmental noises associated with periodontitis? Evidence from a Korean representative cross-sectional study

Variables Occupational noise P Environmental noise P
No (n = 7033), n (%) Yes (n = 1294), n (%) No (n = 8150), n (%) Yes (n = 177), n (%)
Age, mean (95% confidence interval) (years) 58.57 (58.30–58.84) 57.49 (56.91–58.07) 0.001* 58.41 (58.15–58.66) 58.24 (56.61–59.88) 0.853*
Gender
 Male (n = 3572) 2784 (37.8) 788 (58.4) < 0.001 3498 (40.1) 74 (41.8) 0.905
 Female (n = 4755) 4249 (62.2) 506 (41.6)   4652 (57.9) 103 (58.2)  
Residence
 Urban (n = 6706) 5690 (83.1) 1016 (80.2) 0.184 6572 (80.6) 134 (75.7) 0.102
 Rural (n = 1621) 1343 (16.9) 278 (19.8)   1578 (19.4) 43 (24.3)  
Income
 I (lowest) (n = 2024) 1639 (23.1) 385 (29.9) < 0.001 1967 (24.1) 57 (32.2) 0.005
 II (n = 2103) 1748 (24.3) 355 (26.8)   2045 (25.1) 58 (32.8)  
 III (n = 2098) 1799 (25.6) 299 (24.1)   2068 (25.4) 30 (16.9)  
 IV (highest) (n = 2102) 1847 (27.0) 255 (19.2)   2070 (25.4) 32 (18.1)  
Occupation
 White collar (n = 1662) 1521 (20.8) 141 (10.4) < 0.001 1639 (20.1) 23 (13.0) 0.195
 Blue collar (n = 2156) 1590 (21.6) 566 (41.8)   2104 (25.8) 52 (29.4)  
 Pink collar (n = 4509) 3922 (57.6) 587 (47.8)   4407 (54.1) 102 (57.6)  
Marital status
 Married (n = 8018) 6785 (96.8) 1233 (95.5) 0.027 7855 (96.4) 163 (92.1) 0.039
 Single (n = 309) 248 (3.2) 61 (4.5)   295 (3.6) 14 (7.9)  
Diabetes
 No (n = 4593) 3926 (56.6) 667 (53.4) 0.136 4507 (55.3) 86 (48.6) 0.037
 Prediabetes (n = 2367) 1971 (28.0) 396 (29.3)   2317 (28.4) 50 (28.2)  
 Diabetes (n = 1367) 1136 (15.4) 231 (17.3)   1326 (16.3) 41 (23.2)  
Smoking
 Quit/never smoker (n = 6989) 6025 (86.4) 964 (75.0) < 0.001 6850 (84.0) 139 (78.5) 0.004
 Current smoker (n = 1338) 1008 (13.6) 330 (25.0)   1300 (16.0) 38 (21.5)  
Toothbrushing
 No (n = 121) 102 (1.5) 19 (1.5) 0.876 117 (1.4) 4 (2.3) 0.975
 Yes (n = 8206) 6931 (98.5) 1275 (98.5)   8033 (98.6) 173 (97.7)  
Recent dental checkups
 No (n = 5230) 4413 (62.1) 817 (63.4) 0.465 5118 (62.8) 112 (63.3) 0.539
 Yes (n = 3097) 2620 (37.9) 477 (36.6)   3032 (37.2) 65 (36.7)  
  1. P values were obtained by complex samples chi-square test
  2. * P value was obtained by complex samples independent t-test