Study Exposure to ACEI/ARB Exposure to ACEI/ARB Exposure to ACEI/ARB No Exposure to ACEI/ARB No Exposure to ACEI/ARB No Exposure to ACEI/ARB ARR (%) NNT
Total
Critical/Severe Cases
Non-critical/-severe cases
Total
Critical/Severe Cases
Non-critical/-severe cases
Zhang et al., China [11]
188
6
182
940
75
865
4.80
21
0.40 (0.18-0.91)
Yang et al., China [13]
43
4
39
83
19
64
13.60
7
0.41 (0.15-1.12)
Meng et al., China [14]
17
4
13
25
12
13
24.50
4
0.49 (0.19-1.27)
Huang et al., China [18]
20
2
18
30
6
24
10.00
10
0.50 (0.11-2.23)
Zeng et al., China [19]1
28
15
13
47
15
32
+21.70
5
1.68 (0.98-2.88)
Li et al., China [20]
115
57
58
247
116
131
+2.60
38
1.06 (0.84-1.32)
Liu et al., China [21]1
22
7
15
56
31
25
23.50
4
0.58 (0.30-1.11)
Total/Pooled statistics
433
95
338
1428
274
1154
6.00
17
0.72 (0.46-1.12)