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Table 3 Meta-regression of single variable and multivariable

From: Association of osteoarthritis and circulating adiponectin levels: a systematic review and meta-analysis

Variables Number of comparisons β 95%Cl P R2
Single variable
 Publication Year 13 −0.03 −0.11-0.40 0.40 0.68
 Sample size 13 0.0002 0.004–0.03 0.03 0.53
 Country(vs Czech Republic) 13     0.99
  China 3 0.99 −0.45-0.64 0.67  
  Thailand 1 −0.28 −0.83-0.26 0.25  
  Netherlands 1 −0.18 −0.68-0.31 0.40  
  Korea 2 0.66 0.19–1.13 0.01  
  Turkey 2 −0.099 −0.78-0.58 0.73  
  Estonia 1 0.072 −0.52-0.66 0.77  
 Location(vs knee) 13     0.16
  Hand 2 0.21 −0.20-0.73 0.24  
  Knee and Hip 1 0.34 −0.95-0.57 0.60  
 Stage(secondary OA/primary OA) 13 0.22 −0.39-0.85 0.43 0.69
Multivariable
 Mean of Age(years)      0.02
  OA 13 0.02 −0.02-0.06 0.28  
  Control 13 −0.01 −0.04-0.01 0.40  
 Gender(female%)      −0.09
  OA 13 −0.002 −0.02-0.02 0.98  
  Control 13 0.05 −0.01-0.02 0.52  
 Mean of BMI      0.06
  OA 13 −0.04 −0.16-0.08 0.43  
  Control 13 0.10 −0.09-0.30 0.26  
  1. A value of P < 0.05 was considered statistically significant