Table 3 Subgroup analyses of the included studies

Countries

High income

2

2.2

0.3–7.2

98.48

 ≤ 0.0001

Lower-middle income

13

15.8

7.5–30.5

97.64

 ≤ 0.0001

Ward

ICU

10

12.6

4.9–28.7

97.97

 ≤ 0.0001

Open heart cardiac surgery intensive care unit

1

65.3

53.5–75.5

-

-

NICU

1

9.3

6.7–12.7

-

-

Cardiac Intensive Care Unit

1

40.1

30.1–51

-

-

Medical-Surgical Intensive Unit

1

23.2

17.1–30.8

-

-

Trauma Intensive Care Unit

1

16.3

9.8–26

-

-

Countries

Iran

8

13

4.9–30

97.42

 ≤ 0.0001

Jordan

2

17.4

0–99

99.50

 ≤ 0.0001

Lebanon

1

23.2

17.1–30.8

-

-

Palestine

2

25.6

17.9–35.2

60.28

 ≤ 0.0001

Saudi Arabia

2

21.9

2.9–72.3

98.48

 ≤ 0.0001