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Table 1 Background of the study population

From: Transcriptomics and methylomics in chronic periodontitis with tobacco use: a pilot study

  Non-smoker   Smoker   P
  Non-periodontitis
NN, (N = 5)
Periodontitis
NP, (N = 5)
P Non-periodontitis
SN, (N = 5)
Periodontitis
SP, (N = 5)
P Non-smoker vs. Smoker
Age (years) 44 (41–55) 53 (52–55) 0.525* 52 (47–54) 56 (52–56) 0.205* 0.676*
Men:women 3:2 1:4 0.444 5:0 4:1 0.206 0.350
Cigarettes/day 17.5 (5–25) 20.5 (8–22) 0.917*
Years smoking 16.5 (16.5–24) 27 (17–27.5) 0.295*
  1. Values are median (interquartile range)
  2. * P values are calculated by two-tailed Wilcoxon rank sum test
  3. P values are calculated by two-tailed Fisher’s exact test