Protocol’s characteristics | Univariable analysis | Multivariable analysis | ||
---|---|---|---|---|
COR (95% CI ) | p -value | AOR (95% CI ) | p -value | |
Corresponding author based in developed countries | ||||
Yes | 1.9 (1.2–3.1) | 0.016 | 1.6 (1.1–2.6) | 0.013 |
No | Reference | - | Reference | - |
Corresponding author based in English-speaking countries | ||||
Yes | 1.8 (1.2–2.7) | 0.005 | - | - |
No | Reference | - | - | - |
Country of corresponding authors | ||||
UK | 2.4 (1.3–4.4) | 0.004 | - | - |
Australia | 2.1 (1.1–4.1) | 0.020 | - | - |
Canada | 1.4 (0.7–2.7) | 0.368 | - | - |
USA | 1.1 (0.6–2.1) | 0.805 | - | - |
China | 1.2 (0.5–3.0) | 0.644 | - | - |
Others | Reference | - | - | - |
Study funding | ||||
Internal fund only | 0.9 (0.5–1.5) | 0.586 | 0.7 (0.4–1.4) | 0.363 |
Having external fund (with/without internal fund) | 1.7 (1.1–2.7) | 0.025 | 1.6 (1.0–2.6) | 0.047 |
No funding support | Reference | - | Reference | - |
Protocol was updated | ||||
Yes | 1.6 (1.0–2.6) | 0.033 | 1.8 (1.1–3.0) | 0.014 |
No | Reference | - | Reference | - |