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Table 1 Baseline variables between harmonic and electrocautery groups

From: A novel technique of harmonic tissue dissection reduces seroma formation after modified radical mastectomy compared to conventional electrocautery: a single-blind randomized controlled trial

Variable

Harmonic (n = 36)

Electrocautery (n = 36)

p

- Age (years)

51.8 ± 6.5

52.5 ± 7.8

0.707a

- BMI

29.5 ± 3.1

29.6 ± 5.4

0.206 a

- Comorbidities

 HTN

16 (44.4%)

18 (50%)

0.317 b

 DM

12 (33.3%)

14 (38.9%)

0.523 b

 CLD

11 (30.6%)

13 (36.1%)

0.628 b

- Smoking

5 (13.9%)

3 (8.3%)

0.427 b

- Family history

 Positive

4 (11.1%)

8 (22.2%)

0.316 b

- Parity

 Nullpara

4 (11.1%)

2 (5.6%)

0.716 b

 Multipara

32 (88.9%)

34 (94.4%)

0.521 b

- Breast Weight (G)

1511 ± 584.5

1641 ± 828.6

0.139 a

- Clinical TNM stage

 Stage I

4 (11.1%)

2 (5.6%)

0.637 b

 Stage II

26 (72.2%)

30 (83.3%)

 Stage III

6 (16.7%)

4 (11.1%)

-AJCC tumor staging

 Stage I A

1 (2.8%)

1 (2.8%)

0.327 b

 Stage I B

3 (8.3%)

1 (2.8%)

 Stage II A

5 (13.9%)

7 (19.4%)

 Stage II B

21 (58.3%)

23 (63.9%)

 Stage III A

5 (13.9%)

2 (5.5%)

 Stage III B

1 (2.8%)

2 (5.5%)

- No. of lymph nodes retrieved d

21 (11 – 32)

17 (10 – 27)

0.262c

- Neoadjuvant therapy

5 (13.9%)

6 (16.7%)

0.745 b

- Histology

 Ductal carcinoma

34 (94.4%)

32 (88.9%)

0.243 b

 Lobular

2 (5.6%)

4 (11.1%)

  1. at test
  2. bχ2 test
  3. cMann–Whitney U test
  4. dMedian (interquartile range)