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Table 3 Comparison of Mean ± SD and Mean Rank of pain score between Patency (Group A) and non-patency group (Group B) for single visit and multi visit vital and non-vital tooth respectively

From: Influence of maintaining apical patency in post-endodontic pain

Visits/Status

Variables

Mean Rank

Mann–Whitney U

p value*

Group A (n = 20)

Group B (n = 20)

Single/vital (1 V) (n = 40)

Day 1

21.00

20.00

190.000

0.799

Day 2

21.83

19.18

173.500

0.478

Day 7

21.65

19.35

177.000

0.547

Multiple/vital (2 V) (n = 40)

Day 1

24.78

16.23

114.500

0.020

Day 2

23.70

17.30

136.000

0.086

Day 7

23.25

17.75

145.000

0.142

Single/non-vital (1NV) (n = 40)

Day 1

23.40

17.60

142.000

0.121

Day 2

24.05

16.95

129.000

0.056

Day 7

22.35

18.65

163.000

0.327

Multiple/non-vital (2NV) (n = 40)

Day 1

20.05

20.95

191.000

0.820

Day 2

19.78

21.23

185.500

0.698

Day 7

20.90

20.10

192.000

0.841

  1. *Mann Whitney U test, Significant at the 0.05 level