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Table 2 Multivariable analyses of factors associated with recording RA in death certificates (n = 326)

From: Mortality in Rheumatoid Arthritis (RA): factors associated with recording RA on death certificates

Independent variable Odds ratio (OR) 95 % CI P-value
Age 0.97 0.94, 1.00 0.06
Sex (Female==1) 0.78 0.41, 1.51 0.5
Non-Hispanic White ethnicity 1.1 0.56, 2.19 0.8
Health Insurance (yes==1, no==0) 0.57 0.15, 2.10 0.4
Nam & Powers Score 0.98 0.97, 1.00 0.1
Number of Deformities (0–9) 1.0 REFERENT
Number of Deformities (10–21) 1.01 0.45, 2.33 0.9
Number of Deformities (22–28) 2.48 1.1, 5.6 0.03
Steinbrocker Functional Class 1.0 REFERENT
 Class II 1.53 0.18, 13.4 0.7
 Class III 2.13 0.23, 19.4 0.5
 Class IV 1.90 0.19, 18.7 0.6
Charlson Comorbidity (range 1–3) 1.0 REFERENT
Charlson Comorbidity (range 4–5) 0.82 0.40, 1.68 0.6
Charlson Comorbidity (range 6–14) 0.32 0.14, 0.75 0.008
Signed by Certified Physician 4.97 1.39, 17.7 0.013