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Table 1 Group comparison of VAS pain scores (added across 7 days) (mm)

From: Effects of platelet-rich fibrin and piezosurgery on impacted mandibular third molar surgery outcomes

Groups (G)

VAS (n)

Min.

Max.

Median

Mean

SD

χ 2

p*

U**

p*

Traditional (G1)

10

37.0

142.0

68.50

74.60

35.21

  

6.0 (G1–G2)

0.001*

Traditional + PRF (G2)

10

6.0

59.5

20.50

25.00

18.99

18.563

0.001

3.0 (G1–G3)

0.0001*

Piezo + PRF (G3)

10

0.0

43.50

28.5

24.45

14.95

  

46.0 (G1–G4)

0.762

Traditional (G4)

10

12.0

149.5

66.75

48.51

44.15

  

46.5 (G2–G3)

0.791

         

15.0 (G2–G4)

0.008*

         

18.5 (G3–G4)

0.017*

  1. Abbreviations: VAS visual analog scale, Min minimum, Max maximum, SD standart deviation, χ2 Kruskal Wallis test result; *p ≤ 0.05, significance **Mann–Whitney U-test (Bonferroni-correction) results between groups