Table 1 Peri-operative data of patients

Sex

Male

Male

Female

Male

Female

Female

Male

Female

Female

Male

Age

41

55

39

51

53

36

58

43

36

45

FEV1(L)

2.94

3.11

2.52

2.77

2.98

2.85

3.38

2.46

3.02

3.46

Smoking status

Cessation

No

No

Cessation

No

No

Cessation

No

No

No

Body mass index (kg/m²)

23.7

22.4

25.1

24.2

23.9

22.6

23.5

22.1

24.7

23.5

ASA score

1

1

1

1

1

1

1

1

1

1

Thoracic adhesion

No

No

No

Mild

No

No

No

No

No

No

Operation time (min)

95

105

115

125

90

95

100

85

110

105

Chest tube drainage (days)

3

3

5

4

3

4

3

4

3

3

Postoperative hospital stay (days)

4

5

7

5

4

5

4

5

4

4

Pain in postoperative day 1 (VAS)

2

3

1

2

2

2

2

1

1

2

Pain in postoperative day 3 (VAS)

2

3

1

2

1

1

2

1

1

1

Pain in postoperative day 7 (VAS)

1

1

1

1

1

1

1

1

1

1

Myasthenia gravis classification (before operation)

IIB

IIA

I

I

IIA

IIA

I

I

IIA

I

Preoperative QMG score

6

6

2

3

5

5

2

3

5

3

Preoperative duration of symptoms (months)

9

3

2

1

2

6

2

3

2

12

Pathology type

AB

B1

A

B2

AB

B2

B1+B2

B1

B1

AB

Masaoka stage

I

IIA

I

IIA

I

IIA

IIA

I

IIA

I

Maximal diameter (mm)

29

22

19

45

33

23

35

28

30

26

Lymph node invasion

No

No

No

No

No

No

No

No

No

No

Follow-up (months)

21

19

17

16

13

12

10

9

9

8

Postoperative QMG score (6 months)

1

2

2

1

2

2

2

1

3

1

Myasthenic crisis

No

No

No

No

No

No

No

No

No

No

Myasthenia gravis status (after operation)

Improved

Improved

Improved

Improved

Improved

Improved

Improved

Improved

Improved

Improved

Thymoma recurrence

No

No

No

No

No

No

No

No

No

No