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Table 1 Clinical characteristics of the patient groups in comparison to the control group (no periodontitis)

From: Association of levels of antibodies against citrullinated cyclic peptides and citrullinated α-enolase in chronic and aggressive periodontitis as a risk factor of Rheumatoid arthritis: a case control study

  Generalized aggressive periodontitis (N = 51) Generalized chronic periodontitis (N = 50) No periodontitis (N = 89)
Clinical parameters
 Age median (25th/75th percentiles) 42.0 (36.0/49.0)* 48.0 (43.0/56.3)* 44.0 (39.0/56.0)
 Females, n (%) 29 (56,.9) 31 (62.0) 45 (50.6)
 Current smoker, n (%) 17 (33.3) 13 (27.1) 19 (21.3)
 Current and past smokers, n (%) 26 (51.0) 23 (47.9) 33 (37.1)
 Approximal plaque index % 57.0 (32.0/71.0) 56.0 (36.8/87.0) 43.0 (31.4/61.0)
 Bleeding on probing (%) median (25th/75th percentiles) 88.0 (75.0/100.0)* 79.5 (61.3/93.3)* 44.8 (30.0/63.0)
 Probing depth (mm) median (25th/75th percentiles) 5.3 (4.6/6.6)* 4.9 (4.2/6.1)* 2.6 (2.2/2.8)
 Clinical attachment loss (mm) median (25th/75th percentiles) 6.2 (5.7/7.3)* 5.8 (4.7/6.8)* 2.9 (2.6/6.3)
 Teeth with AL >6 mm (%) median (25th/75th percentiles) 46.4 (34.5/60.7)* 32.3 (14.1/57.4)* 0
 Missing teeth median (25th/75th percentiles) 2.0 (0/4.0) 3.0 (1.0/6.0) 2.0 (0/4.0)
Individual occurrence of periodontal bacteria in subgingival pockets
 A. actinomycetemcomitans, n (%) 18 (35.3)* 20 (40.8)* 15 (17.0)
 P. gingivalis, n (%) 37 (72.5)* 37 (75.5)* 19 (21.6)
 P. intermedia, n (%) 28 (54.9)* 30 (61.2)* 27 (30.7)
 T. forsythia, n (%) 43 (84.3) 47 (95.9)* 60 (68.2)
 T. denticola, n (%) 43 (84.3)* 47 (95.9)* 55 (62.5)
  1. AL clinical attachment loss.
  2. * p ≤ 0.05 in comparison with the control group.