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Table 6 Mean 25(OH)D levels adjusted for BMI and sun exposure time according to categorical variables in non vitamin D supplemented patients

From: Vitamin D deficiency in rheumatoid arthritis: prevalence, determinants and associations with disease activity and disability

Categorial variable   Mean Standard deviation P
Disease remission No 21.8 11.1 0.057
  Yes 23.6 12.1  
Steinbrocker functional state 1 24.0 12.8 0.001
  >1 21.2 10.1  
DAS28 <3.1 22.6 9.9 <0.001
  >3.1 20.3 10.7  
Treatment response Good 23.4 12.1 0.020
  Fair 21.5 9.9  
  No 20.5 10.1  
  1. Abbreviations: ANOVA, analysis of variance; 25(OH)D, 25-hydroxyvitamin D; BMI, body mass index; DAS 28, Disease Activity Score 28. P-values were obtained by ANOVA and Chi square test.