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Table 2 Descriptive statistics study of the levels of pain, discomfort, swelling, difficulty in chewing on the experimental and control sides as well as the P-Values for significance tests

From: Does the application of autologous injectable Platelet-Rich Fibrin (i-PRF) affect the patient’s daily performance during the retraction of upper canines? A single-centre randomized split-mouth controlled trial

Time

Variable

Experimental Side (n = 21)

Control Side (n = 21)

P-Value

Mean

SD

Min

Max

Median (IQR)

Mean

SD

Min

Max

Median (IQR)

T1

Pain

24.28

17.48

0.00

60.00

20.00 (15.00–40.00)

3.80

8.64

0.00

30.00

0.00 (0.00–0.00)

 < 0.001***

Discomfort

23.80

17.45

0.00

60.00

20.00 (10.00–35.00)

6.19

10.23

0.00

40.00

0.00 (0.00–10.00)

 < 0.001***

Swelling

25.23

16.00

0.00

60.00

20.00 (15.00–30.00)

2.38

6.24

0.00

20.00

0.00 (0.00–0.00)

 < 0.001***

Difficulty in Chewing

14.76

18.87

0.00

70.00

10.00 (0.00–20.00)

9.04

17.86

0.00

70.00

0.00 (0.00–10.00)

0.016*

T2

Pain

15.23

15.69

0.00

50.00

10.00 (0.00–25.00)

2.38

7.68

0.00

30.00

0.00 (0.00–0.00)

0.002**

Discomfort

16.19

16.27

0.00

50.00

10.00 (0.00–30.00)

4.04

7.68

0.00

20.00

0.00 (0.00–5.00)

0.003**

Swelling

17.14

15.21

0.00

50.00

20.00 (0.00–30.00)

0.47

2.18

0.00

10.00

0.00 (0.00–0.00)

0.001**

Difficulty in Chewing

16.66

19.83

0.00

70.00

20.00 (0.00–30.00)

8.09

15.03

0.00

60.00

0.00 (0.00–15.00)

0.017*

T3

Pain

5.23

10.30

0.00

40.00

0.00 (0.00–10.00)

1.42

6.54

0.00

30.00

0.00 (0.00–0.00)

0.023*

Discomfort

8.57

15.25

0.00

60.00

0.00 (0.00–20.00)

3.80

10.23

0.00

40.00

0.00 (0.00–0.00)

0.112

Swelling

6.19

9.73

0.00

30.00

0.00 (0.00–15.00)

0.95

4.36

0.00

20.00

0.00 (0.00–0.00)

0.015*

Difficulty in Chewing

9.04

16.70

0.00

70.00

0.00 (0.00–15.00)

8.09

15.69

0.00

60.00

0.00 (0.00–10.00)

0.577

T4

Pain

2.38

8.89

0.00

40.00

0.00 (0.00–0.00)

0.47

2.18

0.00

10.00

0.00 (0.00–0.00)

0.180

Discomfort

3.33

6.58

0.00

20.00

0.00 (0.00–5.00)

3.33

9.66

0.00

40.00

0.00 (0.00–0.00)

1.00

Swelling

0.00

0.00

0.00

0.00

0.00 (0.00–0.00)

0.00

0.00

0.00

0.00

0.00 (0.00–0.00)

1.00

Difficulty in Chewing

2.38

7.00

0.00

30.00

0.00 (0.00–0.00)

2.85

7.83

0.00

30.00

0.00 (0.00–0.00)

0.317

  1. T1 is 1 h after the injection; T2 is 2 h after the injection; T3 is 6 h after the injection; T4 is 24 h after the injection
  2. *P < 0.05
  3. **P < 0.01
  4. ***P < 0.001
  5. Wilcoxon Signed-Rank Test