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Table 2 Univariable and covariance analysis for predictive factors on PRISMA scores

From: Exploring reporting quality of systematic reviews and Meta-analyses on nursing interventions in patients with Alzheimer’s disease before and after PRISMA introduction

   

PRISMA univariable analysis

  

PRISMA covariance analysis

 

Variable

Category/unit

Mean Diff.

95% CI

P value

Mean Diff.

95% CI

P value

Publication time

Before PRISMA

Reference

  

Reference

  
 

After PRISMA

3.72

1.59, 5.85

<  0.01

1.65

0.19, 3.10

0.03

Type of article

Systematic reviews only

Reference

  

Reference

  
 

Meta-analyses only

1.93

−1.55, 5.42

0.19

1.71

−0.78, 4.20

0.18

 

Systematic reviews including meta-analyses

5.00

2.97, 7.03

<  0.01

2.57

1.02, 4.13

<  0.01

Origin region of first author

Asia

Reference

  

Reference

  
 

Europe

−0.23

- 2.82, 2.37

0.86

0.93

−0.91, 2.76

0.32

 

U.S.A/Canada

−2.55

− 5.86, 0.76

0.13

0.67

− 1.48,1.97

0.76

 

Australia

− 2.21

−5.94, 1.52

0.24

0.07

−2.70, 2.57

0.96

Number of authors

1~ 4

Reference

  

Reference

  
 

> 4

3.83

2.04, 5.62

<  0.01

1.15

−0.33, 2.53

0.13

International collaborative authorship

No

Reference

  

Reference

  
 

Yes

0.85

−1.84, 3.51

0.54

−1.16

− 2.80, 0.47

0.16

Number of affiliations of author

1~ 3

Reference

  

Reference

  
 

> 3

2.47

0.43, 4.52

0.02

−0.18

−1.59, 1.22

0.79

Affiliation of first author

University

Reference

  

Reference

  
 

Hospital

−1.16

− 4.52, 2.20

0.49

− 0.86

−1.19, 2.92

0.40

 

Institute

−2.45

- 5.11, 0.21

0.07

0.38

−1.33, 2.09

0.66

journal type of published article

Nursing Journal

Reference

  

Reference

  
 

Non Nursing Journal

2.58

0.44, 4.72

0.02

0.30

−1.14, 1.73

0.68

Number of included studies

< 10

Reference

  

Reference

  
 

≥10

−0.74

− 2.186, 1.38

0.49

− 1.06

−2.32, 0.19

0.10

RCT identified

Non-RCT

Reference

  

Reference

  
 

Only RCT

3.19

1.31, 5.06

<  0.01

−0.16

−1.73, 1.41

0.84

 

Can’t answer

−4.59

−7.22, − 1.95

<  0.01

−2.19

−4.20, − 0.18

0.03

Followed PRSIMA guideline

No

Reference

  

Reference

  
 

Yes

2.91

0.89, 4.93

<  0.01

1.22

−0.18 2.63

0.09

Protocol or Registration

No

Reference

  

Reference

  
 

Yes

5.03

3.18, 6.88

<  0.01

2.75

1.38, 4.12

<  0.01

Journal source of SCI

No

Reference

  

Reference

  
 

Yes

7.44

3.89, 11.00

<  0.01

3.76

1.34, 6.18

<  0.01

Manuscript length (no. of pages)

1~ 13

Reference

  

Reference

  
 

> 13

2.68

0.83, 4.52

<  0.01

1.63

0.42, 2.84

<  0.01

Funding support

No

Reference

  

Reference

  
 

Yes

3.49

1.69, 5.29

<  0.01

2.41

1.22, 3.60

<  0.01

  1. Significant results are shown in bold