Table 1 Characteristics of included articles
From: The score after 10 years of registration of systematic review protocols
All SRs | SR with protocol* | SR without protocol* | Cochrane reviews | |
|---|---|---|---|---|
Total, n/N (%) | 357 | 135/357 (38) | 216/357 (61) | 6/357 (1) |
Year, n/N (%) 2020 | 163/357 (46) | 54/163 (33) | 106/163 (65) | 3/163 (2) |
2021 | 194/357 (54) | 81/194 (42) | 110/194 (57) | 3/194 (1) |
COVID related – Yes, N (%) | 8 (2) | 3 (2) | 5 (2) | 0 (0) |
No. of authors, median (Q1–Q3) | 5 (4–7) | 5 (4–7) | 5 (4–7) | 5 (3–6) |
No. of affiliations, median (Q1–Q3) | 3 (2–5) | 3 (2–5) | 3 (2–5) | 4 (3–6) |
Funding source,N (%) | ||||
No funding | 134 (38) | 50 (37) | 81 (38) | 3 (50) |
Nonprofit | 116 (32) | 45 (34) | 68 (31) | 3 (50) |
Not reported | 92 (26) | 35 (26) | 57 (27) | 0 (0) |
Not clear | 7 (2) | 3 (2) | 5 (2) | 0 (0) |
For profit | 7 (2) | 2 (1) | 5 (2) | 0 (0) |
COI statement — Yes, N (%) | 342 (96) | 126 (93) | 210 (97) | 6 (100) |
PRISMA reported^, N (%) | ||||
Yes | 272 (76) | 116 (87) | 156 (72) | 0 (0) |
No | 51 (14) | 9 (7) | 37 (17) | 5 (83) |
Only in flow chart | 34 (10) | 10 (7) | 23 (11) | 1 (17) |
Journal impact factor, median (Q1–Q3) | 3.4 (2.4–5.0) | 3.8 (2.6–5.4) | 3.2 (2.3–4.3) | 9.3 (9.3–9.3) |
Journal endorses PROSPERO+, N (%) | 33 (9) | 12 (9) | 15 (7) | 6 (100) |