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Table 2 Clinicopathological variables of patients undergoing limb salvage surgery vs. amputation

From: Limb salvage versus amputation in patients with osteosarcoma of the extremities: an update in the modern era using the National Cancer Database

Ā 

Type of Surgery

Ā 

p value

Limb Salvage Surgery

Amputation

Total

n

%

n

%

n

%

Location

ā€ƒLower Limb

1536

82.8%

506

86.2%

2042

83.6%

0.053

ā€ƒUpper Limb

319

17.2%

81

13.8%

400

16.4%

Long vs Short Bone

ā€ƒShort Bone

51

2.8%

49

8.5%

100

4.1%

pĀ <ā€‰0.001

ā€ƒLong Bone

1789

97.2%

527

91.5%

2316

95.9%

AJCC Clinical Stage

ā€ƒStage 2A or 2B

1509

81.3%

438

74.6%

1947

79.7%

pĀ =ā€‰0.002

ā€ƒStage 3

63

3.4%

25

4.3%

88

3.6%

ā€ƒStage 4A or 4B

283

15.3%

124

21.1%

407

16.7%

Osteosarcoma Type

ā€ƒOsteosarcoma NOS

1216

66.1%

407

70.7%

1623

67.2%

0.059

ā€ƒChondro/Fibroblastic

370

20.1%

111

19.3%

481

19.9%

ā€ƒTelangiectatic

78

4.2%

24

4.2%

102

4.2%

ā€ƒCentral

108

5.9%

24

4.2%

132

5.5%

ā€ƒSurface/Juxtacortical

68

3.7%

10

1.7%

78

3.2%

Tumor Size (cm); mean (95% CI)

11.6

11.0ā€“12.1

13.1

12.2ā€“13.9

11.9

11.5ā€“12.4

0.005

ā€ƒ<ā€‰8ā€‰cm

547

30.6%

132

23.0%

679

28.7%

pĀ <ā€‰0.001

ā€ƒ>ā€‰8ā€‰cm

1242

69.4%

442

77.0%

1684

71.3%

Presence of Metastases at Dx

ā€ƒNo metastases

1549

84.7%

454

78.3%

2003

83.2%

pĀ <ā€‰0.001

ā€ƒmetastases

279

15.3%

126

21.7%

405

16.8%

Comorbidities at Dx

ā€ƒNo comorbidities

1714

92.4%

520

88.6%

2234

91.5%

0.004

ā€ƒ1 or more

141

7.6%

67

11.4%

208

8.5%

Received Adjuvant Chemotherapy

ā€ƒNo

81

4.4%

62

10.6%

143

5.9%

pĀ <ā€‰0.001

ā€ƒYes

1762

95.6%

521

89.4%

2283

94.1%

Sequence of Adjuvant Treatment

ā€ƒBefore

558

37.3%

170

38.7%

728

37.6%

pĀ <ā€‰0.001

ā€ƒAfter

162

10.8%

88

20.0%

250

12.9%

ā€ƒBefore+After

777

51.9%

181

41.2%

958

49.5%

Surgical Margins

ā€ƒClear

1617

93.7%

541

96.6%

2158

94.4%

pĀ =ā€‰0.010

ā€ƒPositive

108

6.3%

19

3.4%

127

5.6%

Unplanned Readmission After Surgery

ā€ƒNo Unplanned Readmiss

1727

96.2%

548

95.6%

2275

96.1%

0.537

ā€ƒUnplanned Readmission

68

3.8%

25

4.4%

93

3.9%

Inpatient Days after Surgery; mean (95% CI)

6.7

6.3ā€“7.1

6.3

5.6ā€“7.1

6.6

6.3ā€“7.1

0.3706

Days from Dx to Surgery; mean (95% CI)

96.1

94.1ā€“98.1

91.8

87.6ā€“96.1

95.1

93.3ā€“96.9

0.049

Days from Dx to Treatment Commencing; mean (95% CI)

20.5

19.4ā€“21.5

22.4

20.3ā€“24.5

20.9

20.0ā€“21.9

0.0796

Total

1855

75.96%

587

24.04%

2442

100%

Ā