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Table 1 Characteristics of population by periodontal disease

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

Variables Periodontitis P Mild & severe periodontitis P
No (n = 4988), n (%) Yes (n = 3339), n (%) No (n = 4988), n (%) Mild (n = 2448), n (%) Severe (n = 891), n (%)
Age, mean (95% confidence interval) (years) 56.74 (56.41–57.06) 60.89 (60.52–61.26) < 0.001* 56.74 (56.41–57.06)a 60.99 (60.55–61.43)b 60.62 (59.91–61.34)b < 0.001§
Gender
 Male (n = 3572) 1805 (34.1) 1767 (51.5) < 0.001 1805 (34.1) 1222 (49.0) 545 (58.5) < 0.001
 Female (n = 4755) 3183 (65.9) 1572 (48.5)   3183 (65.9) 1226 (51.0) 346 (41.5)  
Residence
 Urban (n = 6706) 4165 (85.8) 2541 (77.9) < 0.001 4165 (85.8) 1882 (79.2) 659 (74.3) < 0.001
 Rural (n = 1621) 823 (14.2) 798 (22.1)   823 (14.1) 566 (20.8) 232 (25.7)  
Income
 I (lowest) (n = 2024) 1127 (22.2) 897 (27.1) < 0.001 1127 (22.2) 645 (26.1) 252 (29.8) < 0.001
 II (n = 2103) 1228 (24.0) 875 (25.8)   1228 (24.0) 632 (24.8) 243 (28.3)  
 III (n = 2098) 1280 (26.0) 818 (24.3)   1280 (26.0) 604 (24.8) 214 (23.0)  
 IV (highest) (n = 2102) 1353 (27.8) 749 (22.8)   1353 (27.8) 567 (24.2) 182 (19.0)  
Occupation
 White collar (n = 1662) 1160 (22.3) 502 (14.4) < 0.001 1160 (22.3) 371 (14.9) 131 (13.2) < 0.001
 Blue collar (n = 2156) 1104 (21.1) 1052 (30.3)   1104 (21.1) 743 (29.3) 309 (32.8)  
 Pink collar (n = 4509) 2724 (56.6) 1785 (55.3)   2724 (56.6) 1334 (55.8) 451 (54.0)  
Marital status
 Married (n = 8018) 4794 (96.5) 3224 (96.7) 0.712 4794 (96.5) 2369 (97.0) 855 (95.9) 0.402
 Single (n = 309) 194 (3.5) 115 (3.3)   194 (3.5) 79 (3.0) 36 (4.1)  
Diabetes
 No (n = 4593) 3011 (60.7) 1582 (49.1) < 0.001 3011 (60.7) 1196 (50.4) 386 (45.3) < 0.001
 Prediabetes (n = 2367) 1338 (27.2) 1029 (29.7)   1338 (27.2) 757 (29.9) 272 (29.1)  
 Diabetes (n = 1367) 639 (12.1) 728 (21.2)   639 (12.1) 495 (19.7) 233 (25.6)  
Smoking
 Quit/never smoker (n = 6989) 4411 (89.0) 2578 (77.9) < 0.001 4411 (89.0) 1927 (79.1) 651 (74.7) < 0.001
 Current smoker (n = 1338) 577 (11.0) 761 (22.1)   577 (11.0) 521 (20.9) 240 (25.3)  
Toothbrushing
 No (n = 121) 60 (1.1) 61 (1.8) 0.023 60 (1.1) 45 (1.8) 15 (1.9) 0.266
 Yes (n = 8206) 4928 (98.9) 3278 (98.2)   4928 (98.9) 2402 (98.1) 876 (98.1)  
Recent dental checkups
 No (n = 5230) 2950 (58.4) 2280 (68.4) < 0.001 2950 (58.4) 1680 (68.6) 600 (67.8) < 0.001
 Yes (n = 3097) 2038 (41.6) 1059 (31.6)   2038 (41.6) 768 (31.4) 291 (32.2)  
  1. P values were obtained by complex samples chi-square test
  2. * P value was obtained by complex samples independent t-test
  3. § P value was obtained by complex samples ANOVA