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Table 2 Multivariable association between interdental brush use and periodontitis

From: The use of an interdental brush mitigates periodontal health inequalities: the Korean National Health and nutrition examination survey (KNHANES)

 Odds ratio (95% confidence interval)
Model 1Model 2Model 3
Use of an interdental brushN = 13,625N = 13,621N = 12,427
Nonusers0.928 (0.814–1.058)0.911 (0.797–1.042)0.918 (0.797–1.057)
UsersReferenceReferenceReference
  1. Response variable: Periodontitis
  2. Explanatory variable: Use of an interdental brush
  3. Model 1 was adjusted to socioeconomic status variables (sex, age, level of education, individual income)
  4. Model 2 was additionally adjusted to personal health practice variables (smoking, toothbrushing, dental flossing, dental clinic visiting)
  5. Model 3 was additionally adjusted to systematic medical factor variables (diabetes mellitus, hypercholesterolemia, hypertension, obesity)