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Table 2 Comparison of behavioural exposure variables and co-morbid conditions between cases and controls

From: Risk factors for chronic periodontitis in Sri Lankan adults: a population based case–control study

Variable Cases (694) Controls (706) p value
% n   %
Mode of tooth cleaning
 Brush 673 97.0 703 99.6  <0.001
 Finger 21 3.0 3 0.4  
Material used for tooth cleaning
 Toothpaste 666 96.0 698 98.9 0.001
 Other 28 4.0 8 1.1  
Tooth cleaning frequency
 Once/day 125 18.0 105 14.9 0.11
 >Once/day 569 82.0 601 85.1  
Smoking
 Never 432 62.2 603 85.4  <0.001
 Former 80 11.5 45 6.4  
 Current 182 26.2 58 8.2  
 Lifetime exposure to smoking in pack-yearsa 0 (0–45) 0 (0–79.2)  <0.001
Betel quid chewing
 No 583 84.0 666 94.3  <0.001
 Current chewer 111 16.0 40 5.7  
Alcohol consumption
 Never 299 43.1 442 62.6  <0.001
 Ever 395 56.9 264 37.4  
Self-reported diabetes
 No 590 85.0 658 93.2  <0.001
 Yes 104 15.0 48 6.8  
Self-reported hypertension
 No 562 81.0 647 91.6  <0.001
 Yes 132 19.0 59 8.4  
Overweight/obeseb
 No 292 42.1 266 37.7 0.09
 Yes 402 57.9 440 62.3  
Abdominal obesityc
 Normal 318 45.8 325 46.0 0.93
 With abdominal obesity 376 54.2 381 54.0  
  1. aMedian, (minimum and maximum) values given
  2. bOverweight/obese based on BMI > 23.0 cut-off for Asian populations
  3. cAbdominal obesity based on waist circumference ≥80 cm and ≥90 cm for adult females and males respectively for Asian populations