The distribution of total score was reviewed according to the Kolmogorov-Smirnov test in terms of normal distribution. The score did not exhibit a normal distribution (Kolmogorov-Smirnov test: p<0.05). Furthermore the Mann-Whitney U-test was applied in the comparison of scores based on the variety of periodontitis classifications (differentiated consideration of periodontally diseased persons) and box plots were created to elucidate the data.