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Table 1 Criteria for the classification of collected GCF.

From: Identification of azurocidin as a potential periodontitis biomarker by a proteomic analysis of gingival crevicular fluid

  N GV MP SP
GI 0 1 2 3
  Normal gingiva mild inflammation, slight change in color and slight edema, no BOP moderate inflammation, redness, edema, glazing, BOP severe inflammation, marked redness and edema, ulceration, tendency toward spontaneous bleeding
PD 1 mm ≤ 3 mm 3 - 7 mm ≥ 7 mm
CAL 0 0 < 5 mm ≥ 5 mm
Evidence of bone loss on radiograph - - + +