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Table 4 Results of the Tukey’s HSD test for the ΔE values of the groups

From: Adhesion and whitening efficacy of P11-4 self-assembling peptide and HAP suspension after using NaOCl as a pre-treatment agent

(I) Groups

(J) Groups

Mean difference (I–J)

Std. Error

Sig

95% Confidence Interval

Lower bound

Upper bound

gp1-HPN

gp3-P

2.31

1.13

0.26

 − 0.90

5.52

gp2-H

3.37

1.13

0.04

0.16

6.58

gp4-N

0.74

1.13

0.97

 − 2.47

3.95

gp5-W

3.65

1.13

0.02

0.44

6.85

gp2-H

gp1-HPN

 − 3.37

1.13

0.04

 − 6.58

 − 0.16

gp3-P

 − 1.06

1.13

0.88

 − 4.27

2.15

NaOCl

 − 2.63

1.13

0.15

 − 5.84

0.58

gp5-W

0.28

1.13

1.00

 − 2.93

3.49

gp3-P

gp1-HPN

 − 2.3

1.13

0.26

 − 5.52

0.90

gp2-H

1.06

1.13

0.88

 − 2.15

4.27

NaOCl

 − 1.57

1.13

0.64

 − 4.78

1.64

gp5-W

1.34

1.13

0.76

 − 1.87

4.55

gp4-N

gp1-HPN

 − 0.74

1.13

0.97

 − 3.95

2.47

gp3-P

1.57

1.13

0.64

 − 1.64

4.78

gp2-H

2.63

1.13

0.15

 − 0.58

5.84

gp5-W

2.91

1.13

0.09

 − 0.30

6.12

gp5-W

gp1-HPN

 − 3.67

1.13

0.02

 − 6.85

 − 0.44

gp3-P

 − 1.34

1.13

0.76

 − 4.55

1.87

gp2-H

 − 0.28

1.13

1.00

 − 3.49

2.93

gp4-N

 − 2.91

1.13

0.09

 − 6.12

0.30