Table 2 Occurrence and characteristics of chronic postoperative pain in 3 months after operation

Number of people with CPSP

13

6

0.04^*

19

NRS

2.61 ± 0.87

2.66 ± 1.37

0.92

Pain degree

0.56

 Mild

11

5

16 (84.2%)

 Moderate

2

1

3 (15.8%)

 Severe

0

0

0 (0.0%)

Location

0.78

 Partial incision

6

4

10 (52.7%)

 Chest wall

7

2

9 (47.3%)

Pain form

0.38

 Spontaneous pain

3

3

6 (31.6%)

 Stretch pain

8

3

11 (57.9%)

 Cough pain

2

0

2 (10.5%)

Duration

0.32

 Always

0

1

1 (5.3%)

 Intermittent

13

5

18 (94.7%)

Analgesic use

1.00

 Unused

11

5

16 (84.2%)

 Used

2

1

3 (15.8%)