Influential factors | Reporting domains and estimated regression coefficients | |||||||
---|---|---|---|---|---|---|---|---|
Title and Introduction | P-value | Methods | P-value | Results | P-value | Conclusion | P-value | |
No. of authors | ||||||||
≤ 4 | Reference | Reference | Reference | Reference | ||||
5 ~ 6 | 0.02 (−0.03, 0.06) | 0.457 | 0.50 (0.20, 0.80) | 0.001 | 0.17 (0.03, 0.31) | 0.018 | 0.20 (0.05, 0.36) | 0.011 |
7~ 8 | −0.01 (− 0.05, 0.04) | 0.819 | 0.57 (0.22, 0.92) | 0.002 | 0.09 (−0.05, 0.23) | 0.208 | 0.10 (−0.10, 0.30) | 0.315 |
> 8 | 0.04 (−0.02, 0.09) | 0.179 | 0.64 (0.23, 1.04) | 0.002 | 0.10 (−0.07, 0.27) | 0.253 | 0.33 (0.12, 0.55) | 0.003 |
Year of publication | ||||||||
2011 | Reference | Reference | Reference | Reference | ||||
2012 | 0.01 (−0.00, 0.02) | 0.198 | 0.37 (−0.30, 1.04) | 0.279 | 0.36 (0.05, 0.68) | 0.025 | −0.29 (− 0.69, 0.11) | 0.157 |
2013 | 0.00 (−0.01, 0.01) | 0.819 | 0.68 (−0.04, 1.41) | 0.062 | 0.45 (0.15, 0.75) | 0.004 | −0.15 (− 0.49, 0.19) | 0.387 |
2014 | 0.01 (0.00, 0.02) | 0.048 | 0.49 (0.06, 1.33) | 0.142 | 0.54 (0.23, 0.85) | 0.001 | −0.19 (− 0.55, 0.18) | 0.318 |
2015 | 0.00 (−0.02, 0.02) | 0.964 | 0.69 (0.06, 1.33) | 0.032 | 0.65 (0.34, 0.96) | < 0.001 | −0.04 (− 0.40, 0.31) | 0.818 |
2016 | −0.00 (− 0.02, 0.01) | 0.709 | 1.03 (0.41, 1.64) | 0.001 | 0.81 (0.53, 1.08) | < 0.001 | 0.10 (−0.24, 0.45) | 0.552 |
2017 (up to July-31) | 0.00 (−0.02, 0.01) | 0.914 | 1.50 (0.82, 2.18) | < 0.001 | 0.83 (0.53, 1.13) | < 0.001 | −0.16 (− 0.53, 0.21) | 0.399 |
Use of reporting guidance | ||||||||
No | Reference | Reference | Reference | Reference | ||||
Yes | −0.00 (−0.02, 0.04) | 0.083 | 0.57 (0.32, 0.82) | < 0.001 | 0.25 (0.13, 0.38) | < 0.001 | 0.17 (0.03, 0.32) | 0.020 |
Region | ||||||||
European | Reference | Reference | Reference | Reference | ||||
Asia Pacific | −0.03 (−0.06, − 0.001) | 0.042 | − 0.45 (− 0.77, − 0.13) | 0.006 | 0.24 (0.07, 0.41) | 0.005 | −0.10 (− 0.26, 0.06) | 0.230 |
America | 0.00 (−0.06, 0.01) | 0.637 | −0.14 (− 0.93, 0.65) | 0.720 | −0.08 (− 0.36, 0.19) | 0.552 | −0.14 (− 0.39, 0.12) | 0.302 |
Methodologist involved | ||||||||
No | Reference | Reference | Reference | Reference | ||||
Yes | −0.00 (−0.02, 0.02) | 0.859 | 0.32 (0.06, 0.58) | 0.015 | 0.10 (−0.02, 0.22) | 0.095 | 0.40 (0.24, 0.56) | < 0.001 |