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Table 2 Pain evaluation between groups (VRS)

From: Effect of platelet rich fibrin on edema and pain following third molar surgery: a split mouth control study

  Group Mann Whitney U Test
n Mean Min Max SD MeanRank U p
6 hour PRF+ 30 2.30 0.00 4.00 1.12 31.32 425.5 0.709
PRF- 30 2.20 0.00 5.00 1.21 29.68
Total 60 2.25 0.00 5.00 1.16  
12 hour PRF+ 30 2.07 0.00 5.00 1.26 32.20 399 0.436
PRF- 30 1.83 0.00 5.00 1.29 28.80
Total 60 1.95 0.00 5.00 1.27  
1st day PRF+ 30 1.33 0.00 5.00 1.24 31.05 433.5 0.800
PRF- 30 1.27 0.00 4.00 1.26 29.95
Total 60 1.30 0.00 5.00 1.24  
2nd day PRF+ 30 1.10 0.00 5.00 1.12 30.97 436 0.827
PRF- 30 1.07 0.00 5.00 1.14 30.03
Total 60 1.08 0.00 5.00 1.12  
3rd day PRF+ 30 0.53 0.00 2.00 0.68 30.95 436.5 0.820
PRF- 30 0.50 0.00 2.00 0.68 30.05
Total 60 0.52 0.00 2.00 0.68  
7th day PRF+ 30 0.10 0.00 1.00 0.31 31.00 435 0.643
PRF- 30 0.07 0.00 1.00 0.25 30.00
Total 60 0.08 0.00 1.00 0.28