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Table 2 Correlation between school grade and improvement ratio of PCR and PHP

From: Self-check with plaque disclosing solution improves oral hygiene in schoolchildren living in a children’s home

School grade

Improvement ratio of PCR

Improvement ratio of PHP

1

−0.028

0.067

1

0.068

0.64

3

0.48

0.48

4

0.32

0.46

4

0.11

0.0

4

0.57

0.26

5

1.00

1.00

6

0.22

0.57

6

0.83

0.67

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Archives of Public Health

ISSN: 2049-3258