Table 1 Descriptive statistics of the included single-arm meta-analytical evidence

Number of meta-analyses

1497

27

10

11

6

Number of studies, median (min–max)

13 (1–1403)

13 (2–129)

11 (2–63)

3 (3–18)

6.5 (6.5–8)

Number of participants, median (min–max)

385 (1–11,595,017)

21,330 (176–1,241,604)

29,017 (150–29,017)

7046 (278–963,860)

73,431 (172–473,870)

I² (N)

 I² > 50%

681

17

1

2

2

 I² ≤ 25%

209

0

0

0

0