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Table 3 Caries increment (ΔDFS) in young adults (n = 982) over the 3-year observation period in relation to tobacco habits

From: Tobacco use and caries increment in young adults: a prospective observational study

  ΔDFS ≥ 0 (%) ΔDFS RR 95% CI
No tobacco 32.6 0.9 (1.6)   
Tobacco use 42.2 1.4a (2.4) 1.5a (1.3–1.8)
 Smoking 47.3 1.6a (2.6) 1.5a (1.2–1.7)
 Smokeless tobacco (snuff) 27.0 0.7 (1.5) 0.8 (0.5–1.3)
  1. The values in the table denote percentage, mean and standard deviation, relative risk (RR) for having new caries lesions and 95% confidence interval (CI)
  2. aStatistically significant difference compared with “no tobacco”, p < 0.01
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