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Table 2 Extent of mass lesion resection comparison between both groups

From: The role of intraoperative ultrasound in gross total resection of brain mass lesions and outcome

Parameters

IOUS group

Conventional group

p

Gross total

Subtotal

Partial

Gross total

Subtotal

Partial

N

%

N

%

N

%

N

%

N

%

N

%

Tumors

179/238

75

49

21

10

4

63/208

30

107

51

38

18

<0.05

 Gliomas

111/154

72

35

23

8

6

33/147

22

90

61

24

16

  High grades

89/122

73

27

22

6

7

21/107

20

74

70

12

11

  Low grades

22/32

69

8

25

2

6

12/40

30

16

40

12

30

 Metastatic

36/42

86

4

10

2

5

6/15

40

4

27

5

33

 Medulloblastoma

18/22

82

4

18

  

15/28

54

7

25

6

21

 Others

14/20

70

6

30

  

9/18

50

6

33

3

17

Hematoma

45

80

11

20

  

30

46

30

46

5

8

0.001

Abscess

29

76

9

24

  

10

37

7

26

10

37

0.001

Location to tentorium

 Supratentorial

196/245

80

40

16

9

4

73/222

33

119

54

30

14

0.001

 Infratentorial

63/87

72

23

26

1

1

30/78

38

25

32

23

29

Location to cortex

 Cortical and subcortical

70/96

73

23

24

3

3

43/100

43

44

44

13

13

0.001

 Subcortical

189/236

80

40

17

7

3

60/200

30

100

50

40

20

Maximal diameter

 ≤ 5 cm

180/205

88

21

10

4

2

80/187

43

92

49

15

8

0.001

 > 5 cm

79/127

62

42

33

6

5

23/113

20

52

46

38

34

Age

 ≤ 18 years

63/84

75

16

19

5

6

36/76

47

27

36

13

17

0.001

 > 18 years

196/248

79

47

19

5

2

67/224

30

117

52

40

18

Sex

 Male

170/215

79

42

20

3

1

73/198

37

80

40

45

23

0.001

 Female

89/117

76

21

18

7

6

30/102

29

64

63

8

8

  1. IOUS intraoperative ultrasound