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Table 1 Demographic and clinical characteristics of study population

From: Analysis of IL-1β, CXCL8, and TNF-α levels in the crevicular fluid of patients with periodontitis or healthy implants

  Control (I) Mild periodontitis (II) Moderate periodontitis (III) Severe periodontitis (IV) Implant (V)
N 36 48 43 30 32
Age (years)
Mean ± SD 35 ± 8 38 ± 9 40 ± 9 42 ± 10 52 ± 16
Range 20–51 27–58 27–60 28–59 20–71
Gender
Male 13 18 21 18 15
Female 23 30 22 12 17
Total natural teeth
Mean ± SD 29 ± 3 28 ± 3 27 ± 3 26 ± 3 14 ± 11
Range 24–32 20–32 22–32 22–32 0–29
Total implants
Mean ± SD 0 0 0 0 6 ± 3
Range 1–12
PD (mm)
Mean ± SD 1.64 ± 0.61 3.34 ± 0.39 4.49 ± 0.23 5.55 ± 0.42 2.84 ± 0.57
Range 0.2–2.5 3–4 4–5 4–6 1.9–4
CAL (mm)
Mean ± SD 0.71 ± 1.20 1.14 ± 1.32 1.80 ± 1.60 6.48 ± 1.65
Range 0–4.5 0–4.5 0–6 1.5–10  
GI (mm)
Mean ± SD 0.81 ± 0.98 1.27 ± 0.74 1.30 ± 0.6 1.67 ± 0.71 0.34 ± 0.55
Range 0–3 0–2 0–2 0–3 0–2
  1. SD, standard deviation