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Table 7 Multivariable analysis of medication adherence (Data for all participants)

From: Determinants of adherence to disease modifying anti-rheumatic drugs in White British and South Asian patients with rheumatoid arthritis: a cross sectional study

  B Confidence interval P value R 2 for model
     0.328
Age (years) −0.012 −0.049–(0.025) 0.523  
Gender (male) −0.754 −1.754–(0.245) 0.138  
Number of years education −0.022 −0.095–(0.050) 0.540  
English spoken by patient −0.492 −2.384–(1.399) 0.608  
Same language spoken by patient and GP 1.447 −0.466–(3.360) 0.137  
Born in Pakistana 2.071 −0.023–(4.165) 0.053  
Born in Indiaa 1.575 −0.158–(3.307) 0.075  
Ethnicity (White British) 7.333 2.924–(11.743) 0.001*  
BMQ
NCD 0.079 −0.590–(0.749) 0.815  
General Overuse −0.193 −0.478–(0.092) 0.183  
General Harm −0.049 −0.250–(0.153) 0.635  
SIMS
SIMS action and usage (South Asian patients) 0.560 0.163–(0.958) 0.006*  
SIMS action and usage (White British patients) −0.202 −0.595–(0.191) 0.311  
SIMS potential problems 0.428 0.217–(0.639) <0.001**  
IPQ
IPQ Personal control −0.070 −0.205–(0.066) 0.310  
IPQ Illness coherence 0.086 −0.038–(0.211) 0.174  
Interaction     
SIMS action and usage x ethnicityb    0.005*  
  1. a= reference category born in UK. bThe significant interaction indicates that the effect of SIMS action and usage varies with ethnic group: hence two separate sets of values for South Asian and White British patients. * = significant at <0.01 ** = significant at <0.001