Table 1

 Baseline characteristics of study population

VariableRA groupNon-RA groupp Value*
The values for age, BMI, alcohol use, and radiation dose are the mean of each group.
*For the comparison between rheumatoid arthritis and non-rheumatoid arthritis individuals, adjustments were made for age and sex except for the comparison of female percentage and mean age.
BMI, body mass index; CHD, coronary heart disease; COPD, chronic obstructive lung disease; RA, rheumatoid arthritis.
No of individuals9116 028
Percent female80.261.5<0.01
Age (years)56.844.6<0.01
BMI (kg/m2)21.321.2NS
Current smoking (%)16.736.5NS
Alcohol use (g/week)2.52.9NS
Radiation dose (Gy)0.360.37NS
Comorbid disease (%)
    Kidney disease4.41.2<0.05
    Liver disease2.22.3NS