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Table 2 Comparison of outcome 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

- Duration of surgery (hours)

2.63± 0.41

1.75 ± 0.26

0.0001 a

- Blood loss (ml)

69.4 ± 25.1

255.5 ±41.6

0.002 a

- Total drain volume (ml)

1277.8 ± 172.5

3300 ±167.5

0.002 a

- Duration of drains (days)

13.3 ± 1.13

17.9 ± 1.64

0.001 a

- Complications

 Wound infection

2 (5.6%)

8 (22.2%)

0.569 b

 Delayed Healing

2 (5.6%)

8 (22.2%)

0.569 b

 Flap necrosis

0

5 (27.8%)

0.435 b

 Hematoma

2 (5.6%)

7 (19.4%)

0.164 b

 Re-accumulation of seroma after drain removal

3 (8.3%)

12 (33.3%)

0.003 b

  1. at test
  2. bχ2 test