Clinical Study

Spondyloarthropathies in Autoimmune Diseases and Vice Versa

Table 4

Age and gender of patients with ADs and SpAs.

CharacteristicRA ( )SLE ( )SS ( )SpAs ( )

Age, mean (SD)51.8 (12.34)37.1 (14.63)50.5 (13.91)43.78 (11.08)<0.001
Age at onset, mean (SD)38.7 (13.47)29.03 (13.02)44.2 (13.72)34.77 (11.39)<0.001
Male (%)18.318.25.356.9
Female (%)81.7*81.8*94.7*43.1

SS: Sjögren’s syndrome, RA: rheumatoid arthritis, SLE: systemic lupus erythematosus, SpAs: spondyloarthropathies, and SD: standard deviation.
Significant differences were observed between the following groups: RA versus SLE, RA versus SpAs, SLE versus SS, SLE versus SpAs, and SS versus SpAs.
Significant differences were observed between the following groups: RA versus SLE, RA versus SS, RA versus SpAs, SLE versus SS, SLE versus SpAs, and SS versus SpAs.
*Females were more prevalent in each group ( ), but not in the SpAs group.