Table 1 Subject demographics
ParameterValue
No. of subjects241
Average age in years (range, SEM)57 (22−95, 14)
Average disease duration in years (range, SEM)8.6 (0−49, 10.6)
Female (%)194 (80%)
Smoking history:*
    Never141 (69%)
    Current25 (12%)
    Past37 (18%)
Radiographic erosions†Present: 98 (46%)

  • *Smoking: data available for 203 subjects; †radiographic erosions: data available for 214 subjects.

  • SEM, standard error of the mean.