Skip to main content

Advertisement

Table 3 Meta-regression: the effect of impact factor, COI, Funding category, year, and sample size and on absolute values of effect size

From: The effect of journal impact factor, reporting conflicts, and reporting funding sources, on standardized effect sizes in back pain trials: a systematic review and meta-regression

   Unadjusted   Adjusted b  
   β P 95 % CI for β β P 95 % CI for β
Impact factor        
   −0.01 0.54 −0.04 to 0.02 0.004 0.81 −0.03 to 0.04
COI Category a       
  Reported none 0.13 0.52 −0.25 to 0.51 -0.14 0.51 −0.55 to 0.28
  Reported some −0.24 0.42 −0.82 to 0.34 -0.21 0.46 −0.78 to 0.36
Funding Category a       
  Reported none 0.94 0.001 0.42 to 1.45 1.02 0.001 0.44 to 1.59
  Reported some 0.05 0.76 −0.27 to 0.37 0.12 0.51 −0.24 to 0.48
Publication year        
   −0.05 0.31 −0.14 to 0.05 −0.05 0.31 −0.14 to 0.05
Sample size        
   −0.0004 0.20 −0.001 to 0.0002 −0.0004 0.20 −0.001 to 0.0003
  1. acomparison: none reported
  2. bfor other variables in the model