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Table 1 Anthropometric and sociodemographic characteristics and comorbidities in RA patients and controls

From: Association between severity of periodontitis and clinical activity in rheumatoid arthritis patients: a case–control study

  RA patients Controls p
N % N %
Gender
 Female 147 78.61 101 64.33  
 Male 40 21.39 56 35.67  
 Ratio female/male 3.6   1.8   0.003*
Mean (SD) age (years) 54.4 (10.8)   55.5 (23.7)   
Race
 Caucasian 182 97.33 152 96.81  
Diagnosis
 Osteoarthritis 118 75.15  
 Back pain 23 14.65  
 Scapulohumeral peri-arthritis 10 6.36  
 Others 6 3.84  
Graffar Scale
 High 13 6.95 25 15.92  
 Medium 34 18.18 48 30.57  
 Low 68 36.36 55 35.03  
 Relative poverty 63 33.69 28 17.83  
 Extreme poverty 8 4.28 0 0 < 0.001*
Annual dental prophylaxis 80 43.01 90 57.32 0.008*
Mean (SD) ESR (mm/h) 26.03 (16.8)   16.97 (12.92)   
 Periodontally healthy (Level 0) 21.80 (7.46)   16.06 (8.98)   
 Periodontitis (Level 1 + 2) 25.86 (16.68)   19.05 (15.40)   0.022**
Mean (SD) CRP (mg/L) 5.14 (7.00)   2.85 (4.03)   
 Periodontally healthy (Level 0) 4.43 (2.34)   1.72 (1.08)   
 Periodontitis (Level 1 + 2) 4.86 (5.21)   3.26 (4.83)   0.069**
Bone mineral density
 Normal 64 44.14 113 80.14  
 Osteopenia 47 32.41 16 11.35  
 Osteoporosis 34 23.45 11 7.8 < 0.001*
Tobacco
 Never 105 56.15 125 79.62  
 Current 36 19.25 14 8.92  
 Former smoker 46 24.6 18 11.46 < 0.001*
Stress 50 27.03 46 29.30  
Diabetes 23 12.3 13 8.33  
 Type II 19 10.16 12 7.64  
Dyslipidemia 100 53.48 71 45.22  
 Hypercholesterolemia 51 27.27 56 35.67  
 Hypertriglyceridemia 21 11.23 7 4.46  
 Mixed hyperlipidemia 28 14.97 8 5.1 < 0.001*
Hypertension 58 31.02 35 22.29  
Myocardial infarction 8 4.28 3 1.92  
Mean (SD) BMI (kg/m2) 27 (4.7)   27.9 (4.4)   
  Normal, 18.5–24.99 52 27.81 47 30.13  
  Overweight, 25–29.99 79 42.25 71 45.51  
  Obesity I, 30–34.99 46 24.6 28 17.95  
  1. Data represent number, percentage or mean (SD). p > 0.05 not shown
  2. BMI body mass index, CRP C-reactive protein, ESR erythrocyte sedimentation rate, RA rheumatoid arthritis, SD standard deviation
  3. *Inter-group comparisons
  4. **Intra-group comparisons