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Table 3 Multivariable regression analysis of potential factors for reporting quality of each domain

From: Improving the quality of reporting of systematic reviews of dose-response meta-analyses: a cross-sectional survey

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

  1. Note: The correlations of the four domains were small, ranges from 0.003 to 0.357
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BMC Medical Research Methodology

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