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Table 1 Comparison of different variables between three classes of diseases (Hamadan in the west of Iran- September 2016 to June 2018)

From: A decision support system based on support vector machine for diagnosis of periodontal disease

Class
Variable Gingivitis Localized periodontitis Generalized periodontitis P-value*
Mean ± SD Mean ± SD Mean ± SD
Age 32.91 ± 10.77 33.88 ± 10.52 34.23 ± 12.38 0.656
Attachment loss 1.63 ± 0.47 2.24 ± 0.61 3.39 ± 0.81 < 0.001
Plaque Index (%) 43.46 ± 17.82 62.13 ± 17.80 74.55 ± 15.09 < 0.001
Probing packet depth 1.48 ± 0.32 2.01 ± 0.54 3.25 ± 0.78 < 0.001
  n % n % n % P-value**
Sex
 Female 65 40.6 19 31.7 29 36.3 0.453
 Male 95 59.4 41 68.3 51 63.8  
Smoking
 No 148 92.5 54 90 65 81.2 0.031
 Yes 12 7.5 6 10 15 18.8  
Gingival Index
 Grade I 48 30 6 10 5 15 < 0.001
 Grade II 78 48.8 24 40 27 33.8  
 Grade III 31 19.4 26 43.3 39 43.8  
 Grade IV 3 1.9 4 6.7 9 7.6  
Alveolar Bone Loss
 0 153 95.6 7 11.7 2 2.5 < 0.001
 1 4 2.5 18 30.0 32 40.0  
 2 3 1.9 35 58.3 46 57.5  
Papilla Bleeding Index
 0 41 25.6 8 13.3 9 11.3 < 0.001
 1 78 48.8 22 36.7 13 16.3  
 2 37 23.1 23 38.3 41 33.7  
 3 4 2.5 7 11.7 17 9.3  
Mobility
 No 140 87.5 35 58.3 46 57.5 < 0.001
 Yes 20 12.5 25 41.7 34 42.5  
Simplified Oral Hygiene Index
 0 5 3.1 9 15 10 12.5 < 0.001
 1 16 10.0 16 26.7 11 13.8  
 2 79 49.4 24 40.0 40 50.0  
 3 60 37.5 11 18.3 19 23.8  
  1. *ANOVA
  2. **Chi Square Test