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Table 5 Odds and adjusted odds ratios for demographic and clinical characteristics associated with making dietary change

From: Cardiovascular risk management in rheumatoid and psoriatic arthritis: online survey results from a national cohort study

Univariate analysis    Multivariate analysis (baseline model)* Multivariate
analysis (final model)*
Variable OR (95% CI) p Adjusted OR (95% CI) p Adjusted OR (95% CI) p
Sex (female vs male) 1.72 (0.81–3.62) 0.16 1.90 (0.86–4.20) 0.11
Diagnosis (PsA vs RA) 0.87 (0.38–1.98) 0.7
Current biologic DMARD 0.44 (0.23–0.82) 0.01 0.42 (0.21–0.82) 0.01 0.36 (0.19–0.71) 0.003
Current methotrexate 1.12 (0.61–2.06) 0.7
Current prednis(ol)one 0.82 (0.43–1.57) 0.6
Current hypertension 1.63 (0.88–3.04) 0.12 1.26 (0.63–2.51) 0.51
Current hyperlipidaemia 2.08 (1.07–4.06) 0.03 2.06 (0.99–4.31) 0.05 2.20 (1.09–4.44) 0.03
Current diabetes 1.60 (0.60–4.31) 0.4
Current smoker 0.73 (0.16–3.42) 0.7
Overweight or obese 3.91 (1.76–8.67) 0.001 4.08 (1.76–9.47) 0.001 4.49 (1.97–10.26) < 0.001
University/tertiary education 0.94 (0.52–1.72) 0.9
Full time work or study 0.94 (0.48–1.85) 0.9
Age ≥ 65 years 1.10 (0.59–2.08) 0.8
Disease duration ≥5 years 1.33 (0.37–4.73) 0.7
Self-reported low disease activity (VAS ≤ 20) 0.43 (0.22–0.87) 0.02 0.55 (0.26–1.16) 0.12
Low pain (VAS ≤20) 0.46 (0.22–0.94) 0.03
  1. Combined analysis including RA and PsA respondents, N = 275
  2. OR odds ratio, CI confidence interval, RA rheumatoid arthritis, PsA psoriatic arthritis, DMARD disease modifying antirheumatic drug, VAS visual analogue scale
  3. *Variables with p ≤ 0.25 in the univariate logistic regression were entered into the multivariate logistic regression baseline model and non-significant covariates removed via backwards stepwise elimination until only significant covariates remained in the final model. Stepwise backwards elimination process can be seen in Additional file 1. Nagelkerke R2 for model = 0.15