Table 3 Annual tooth loss per patient for each stage and grade during APT + SPT, APT, and SPT.

From: Evaluation of periodontitis-related tooth loss according to the new 2018 classification of periodontitis

  

APT + SPT

APT

SPT

 

Number of patients

Mean ± SD

Median (25% quantile; 75% quantile)

p-value

Mean ± SD

Median (25% quantile; 75% quantile)

p-value

Mean ± SD

Median (25% quantile; 75% quantile)

p-value

Stage

I

19

0.00 ± 0.00

0.00 (0.00;0.00)

 < 0.01*

0.00 ± 0.00

0.00 (0.00;0.00)

 < 0.01*

0.00 ± 0.00

0.00 (0.00;0.00)

 < 0.01*

II

137

0.00 ± 0.00

0.00 (0.00;0.00)

0.00 ± 0.00

0.00 (0.00;0.00)

0.00 ± 0.00

0.00 (0.00;0.00)

III

335

0.04 ± 0.11c

0.00 (0.00;0.00)

0.07 ± 0.33b

0.00 (0.00;0.00)

0.05 ± 0.14c

0.00 (0.00;0.00)

IV

116

0.24 ± 0.31acd

0.14 (0.00;0.34)

0.39 ± 0.85 cd

0.00 (0.00;0.00)

0.18 ± 0.27acd

0.00 (0.00;0.30)

Grade

A

9

0.00 ± 0.00

0.00 (0.00;0.00)

 < 0.01*

0.00 ± 0.00

0.00 (0.00;0.00)

 < 0.01*

0.00 ± 0.00

0.00 (0.00;0.00)

 < 0.01*

B

334

0.01 ± 0.05

0.00 (0.00;0.00)

0.02 ± 0.17

0.00 (0.00;0.00)

0.01 ± 0.03

0.00 (0.00;0.00)

C

264

0.15 ± 0.24ef

0.08 (0.00;0.28)

0.23 ± 0.66

0.00 (0.00;0.00)

0.13 ± 0.23f

0.00 (0.00;0.17)

Total

607

0.07 ± 0.18

0.00 (0.00;0.00)

 

0.11 ± 0.46

0.00 (0.00;0.00)

 

0.06 ± 0.17

0.00 (0.00;0.00)

 
  1. Statistical analysis between the three or four groups was performed with the Kruskal–Wallis test followed by the Steel–Dwass post hoc test.
  2. SD standard deviation, APT active periodontal therapy, SPT supportive periodontal therapy.
  3. *p-value from the Kruskal–Wallis test.
  4. Significant difference by the Steel–Dwass post hoc test compared with Stage I (p < 0.01:a), compared with Stage II (p < 0.05:b, p < 0.01:c), compared with Stage III (p < 0.01:d), compared with Grade A (p < 0.05: e), compared with Grade B (p < 0.01: f).
  5. 0.00 in the table shows that the number of extracted tooth was zero.
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