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. 2017 Sep 14;7:11580. doi: 10.1038/s41598-017-06674-2

Table 1.

Age, gender, smoking habit and clinical characteristics associated with the periodontal status in the control and perio groups.

Clinical parameters Study groups
Control group (n= 74) Perio group (n= 73) P Value
Age (years) 45.65 (12.37) 51.12 (10.01) 0.005
Gender
  Male 31 31 NS
  Female 43 42
Smoking habit 1
  Non-smokers 61 32 <0.001
  Smokers 13 41
    Cigarretes/day (no.) 8.08 (4.44) 15.20 (7.94) 0.001
    Months of smoking (no.) 236.38 (155.91) 320.78 (109.03) NS
No. of teeth 26.72 (3.25) 25.55 (4.00) NS
Full mouth
  BPL (%) 26.41 (18.66) 53.08 (26.77) <0.001
  BOP (%) 15.05 (6.61) 51.12 (20.07) <0.001
  PPD (mm) 2.11 (0.27) 3.49 (0.65) <0.001
  CAL (mm) 2.36 (0.46) 4.25 (1.12) <0.001
Sampled sites
  BOP (%) 10.11 (10.24) 66.97 (23.93) <0.001
  PPD (mm) 2.23 (0.22) 5.65 (0.89) <0.001
  CAL (mm) 2.31 (0.27) 6.05 (1.12) <0.001

Values are means (standard deviations) and number of subjects. BPL = bacterial plaque level; BOP = bleeding on probing; PPD = probing pocket depth; CAL = clinical attachment level; NS = not significant. 1-Patients were defined as smokers if he/she was currently smoking and had been a smoker for at least 8 years) and as non-smokers if he/she had never smoked or quitted smoking longer than 5 years before the sampling.