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Table 2 Univariate and multivariate predictive models of PRISMA-A items reported in abstracts of SRs on psoriasis interventions

From: Abstract analysis method facilitates filtering low-methodological quality and high-bias risk systematic reviews on psoriasis interventions

   Univariable    Multivariable
Variables   analysis    analysis
  n Estimate (SE) p-value Estimate (SE) OR (95%CI)
Abstract word count      
≤ 300 98 1    
> 300 40 1.068(0.539) 0.049 0.741(0.332) 1.456(0.658-3.240)
Abstract format      
8-headings 16 1    
IMRAD 77 − 1.205(0.418) 0.004 − 0.049(0.418) 0.951(0.420-2.153)
Free format 45 − 1.539(0.445) < 0.001 − 0.152(0.415) 0.858(0.378-1.939)
Cochrane affiliation      
Yes 9 1.068(0.539) 0.049 0.543(0.734) 1.722(0.401-7.296)
No 129 1    
Number of authors      
≤ 6 102 1    
> 6 36 0.600(0.303) 0.049 0.725(0.341) 1.098(1.012-1.194)
Conflict of interest      
≤ 20% 59 1    
> 20% 61 − 0.400(0.260) 0.126   
Funding source      
Academic 39 1.156(0.283) < 0.001 1.247(0.428) 3.630(1.788-7.542)
Pharmaceutical 40 − 0.198(0.297) 0.506   
No funding/UNK 59 0.302(0.478) 0.528   
PRISMA endorser journal      
Yes 10 1.562(0.448) 0.002 2.016(0.698) 4.370(1.785-10.98)
No 117 1    
PRISMA-A statement      
Review published before 71 − 0.421(0.371) 0.119   
Review published after 68 1    
Journal impact factor      
≤ 3 74 1    
> 3 43 0.331(0.373) 0.014 0.331(0.373) 1.392(0.669-2.912)