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Table 3 Relationships between lymphoscintigraphic findings and therapy response

From: Predictive role of lymphoscintigraphy undergoing lymphovenous anastomosis in patients with lower extremity lymphedema: a preliminary study

Qualitative lymphoscintigraphic indicators

Dichotomous early response (at 3 months)

Dichotomous late response (at 1 year)

Volume increase†

Volume decrease§

p-value

Volume increase

Volume decrease

p-value

Inguinal LN uptake

Absent

4 (57.1%)

3 (42.9%)

N-S

4 (57.1%)

3 (42.9%)

N-S

 

Present

5 (50.0%)

5 (50.0%)

 

5 (50.0%)

5 (50.0%)

 

Main lymphatic vessel

Absent

5 (38.5%)

8 (61.5%)

N-S

6 (46.2%)

7 (53.8%)

N-S

 

Present

4 (100.0%)

0 (0.0%)

 

3 (75.0%)

1 (25.0%)

 

Collateral vessel

Absent

8 (53.3%)

7 (46.7%)

N-S

7 (46.7%)

8 (53.3%)

N-S

 

Present

1 (50.0%)

1 (50.0%)

 

2 (100.0%)

0 (0.0%)

 

Dermal backflow (Pattern 1)

Absent

4 (80.0%)

1 (20.0%)

N-S

4 (80.0%)

1 (20.0%)

N-S

 

Present

5 (41.7%)

7 (58.3%)

 

5 (41.7%)

7 (58.3%)

 

Dermal backflow (Pattern 2)

Absent OR distal only

7 (58.3%)

5 (41.7%)

N-S

7 (58.3%)

5 (41.7%)

N-S

 

Proximal only OR whole lower limb

2 (40.0%)

3 (60.0%)

 

2 (40.0%)

3 (60.0%)

 

Dermal backflow (Pattern 3)

Absent OR proximal only

6 (85.7%)

1 (14.3%)

0.050

6 (85.7%)

1 (14.3%)

0.050

 

Distal only OR whole lower limb

3 (30.0%)

7 (70.0%)

 

3 (30.0%)

7 (70.0%)

 

Dermal backflow (Pattern 4)

Absent OR distal only OR proximal only

9 (64.3%)

5 (35.7%)

N-S

9 (64.3%)

5 (35.7%)

N-S

 

Whole lower limb

0 (0.0%)

3 (100.0%)

 

0 (0.0%)

3 (100.0%)

 

Quantitative lymphoscintigraphic indicators

Early response (at 3 months)

Late response (at 1 year)

N

Mean rank

p-value

N

Mean rank

p-value

1 h LN uptake ratio

Volume increase†

9

8.22

N-S

9

7.78

N-S

 

Volume decrease§

8

9.88

 

8

10.38

 

1 h Extremity uptake ratio

Volume increase

9

7.56

N-S

9

7.44

N-S

 

Volume decrease

8

10.63

 

8

10.75

 

1 h Injection site clearance ratio

Volume increase

9

9.56

N-S

9

9.78

N-S

 

Volume decrease

8

8.38

 

8

8.13

 

2 h LN uptake ratio

Volume increase

9

8.11

N-S

9

7.67

N-S

 

Volume decrease

8

10.00

 

8

10.50

 

2 h Extremity uptake ratio

Volume increase

9

7.33

N-S

9

6.44

0.027*

 

Volume decrease

8

10.88

 

8

11.88

 

2 h Injection site clearance ratio

Volume increase

9

8.22

N-S

9

8.00

N-S

 

Volume decrease

8

9.88

 

8

10.13

 
  1. †Volume difference ratio below zero was considered as volume increase
  2. §Volume difference ratio above zero was considered as volume decrease
  3. *Statistically significant; N-S, not statistically significant