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Table 2 Factors associated with the paper publication of protocols

From: Factors associated with successful publication for systematic review protocol registration: an analysis of 397 registered protocols

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

-

  1. Statistical analysis tests: logistic regression. Stepwise method was used to select the variables in the multivariable regression. “Corresponding author based in English-speaking countries” and “country of corresponding authors” were insignificant factors in the multivariable regressions and were removed from the model