1. Summary of characteristics of studies.

Study ID

Total number of participants

Intervention (n)

Comparison (N)

Country

*Primary outcomes reported

**Secondary outcomes reported

1

2

3

4

5

6

7

8

9

Eryilmaz 2005

45

Needle aspiration without ultrasound (n = 22)

I&D (n = 23)

Turkey

Y

N

Y

N

N

Y

N

Y

N

Saleem 2008

60

Percutaneous ultrasound‐guided drainage (n = 30)

I&D (n = 30)

Pakistan

Y

Y

N

Y

N

Y

Y

Y

N

Singla 2002

150

All women underwent (I&D) Antibiotics (Group 1 n = 50; Group 2 n = 50)

Control (n = 50)

India

Y

N

Y

N

N

N

Y

N

N

Suthar 2012

70

Percutaneous ultrasound‐guided needle aspiration (n = 35)

Open surgical drainage (n = 35)

India

Y

Y

Y

N

N

N

Y

N

Y

*Primary and **Secondary outcomes

1. Time to complete resolution.
2. Any continuation of breastfeeding after treatment.
3. Treatment failure .
4. Number of follow‐up visits.
5. Duration of continuation of breastfeeding after treatment.
6. Maternal satisfaction with treatment.
7. Post‐operative complications/morbidity.
8. Duration of hospital stay.
9. Adverse events.

I&D: incision and drainage