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Table 5 Pain levels considering the groups and time frames

From: Postoperative pain after single-visit root canal treatments in necrotic teeth comparing instruments’ kinematics and apical instrumentation limits – a prospective randomized multicenter clinical trial

 

Groups

  

Time

Pain level

I

II

III

IV

Total

P value

24 h

None (n. / % according to the pain score / % regarding the group)

52 / 31%/ 86.7%a

43 / 25.6% / 71.7%a.b

38 / 22.6% / 63.3%b

35 / 20.8% / 58.3%b

168 / 100% / 70%

0.02

Mild (n. / % according to pain score / % regarding group)

7/ 15.6% / 11.7%ª

8 / 17.8% / 13.3%ª

14 / 31.1% / 23.3%ª

16 / 35.6% / 26.7%ª

45 / 100% / 18.8%

Moderate (n. / % according to the pain score / % regarding the group)

1/ 5.3% / 1.7%ª

7 / 36.8% / 11.7%ª

5 / 26.3% / 8.3%ª

6 / 31.6% / 10%ª

19 / 100% / 7.9%

Acute/Severe (n. / % according to the pain score / % regarding the group)

0 / 0% / 0%ª

2 / 25% / 3.3%ª

3 / 37.5% / 5.0%ª

3 / 37.5% / 5%ª

8 / 100% / 3.3%

Total

60 / 25% / 100%

60 / 25% / 100%

60 / 25% / 100%

60 / 25% / 100%

240 / 100% / 100%

48 h

None (n. / % according to the pain score / % regarding the group)

55 / 27.2% / 91.7%ª

46 / 22.8% / 76.7%ª

51 / 25.2% / 85%ª

50 / 24.8% / 83.3%ª

202 / 100% / 84.2%

0.49

Mild (n. / % according to pain score / % regarding the group)

5 / 20% / 8.3%ª

9 / 36% / 15%ª

5 / 20% / 8.3%ª

6 / 24% / 10%ª

25 / 100% / 10.4%

Moderate (n. / % according to the pain score / % regarding the group)

0 / 0% / 0%ª

4 / 36.4% / 6.7%ª

4 / 36.4% / 6.7%ª

3 / 27.3% / 5%ª

11 / 100% / 4.6%

Acute/Severe (n. / % according to the pain score / % regarding the group)

0 / 0% / 0%ª

1 / 50% / 1.7%ª

0 / 0% / 0%ª

1 / 50% / 1.7%ª

2 / 100% / 0.8%

Total

60 / 25% / 100%

60 / 25% / 100%

60 / 25% / 100%

60 / 25% / 100%

240 / 100% / 100%

72 h

None (n. / % according to the pain score / % regarding the group)

57 / 26.3% / 95%ª

53 / 24.4% / 88.3%ª

55 / 25.3% / 91.7%ª

52 / 24% / 86.7%ª

217 / 100% / 90.4%

0.27

Mild (n. / % according to pain score / % regarding group)

3 / 20% / 5%ª

3 / 20% / 5%ª

2 / 13.3% / 3.3%ª

7 / 46.7% / 11.7%ª

15 / 100% / 6.3%

Moderate (n. / % according to the pain score / % regarding the group)

0 / 0% / 0%ª

3 / 42.9% / 5%ª

3 / 42.9% / 5%ª

1 / 14.3% / 1.7%ª

7 / 100% / 2.9%

Acute/Severe (n. / % according to the pain score / % regarding the group)

0 / 0% / 0%ª

1 / 100% / 1.7%ª

0 / 0% / 0.0%ª

0 / 0% / 0%ª

1 / 100% / 0.4%

Total

60 / 25% / 100%

60 / 25% / 100%

60 / 25% / 100%

60 / 25% / 100%

240 / 100% / 100%

  1. - The p-value (P < 0.05) provided by the Chi-Square Test indicates dependence between the two variables
  2. - Different letters in the columns indicate a statistically significant difference between the columns for each category proved by the p-value < 0.05) provided by the Z test of differences between two proportions with Bonferroni correction