Table 1.

Demographic characteristics of patients with rheumatoid arthritis (RA), spondyloarthropathy (SpA), and osteoarthritis (OA). Data are expressed as mean ± SEM.

Characteristic	RA	SpA	OA
No. patients	189	56	32
Female/male	161/28	22/34	26/6
Age, yrs, mean ± SEM (range)	53.0 ± 0.9^{^b,^c} (20–77)	41.4 ± 1.77^{^a,^c} (18–69)	63.5 ± 2.24^{^a,^b} (43–87)
Disease duration, mo, mean ± SEM	114.6 ± 7.24	90.5 ± 17.17	106.7 ± 13.65
Height, cm, mean ± SEM	163.1 ± 0.54^b	171.4 ± 1.53^{^a,^c}	163.8 ± 1.46^b
Weight, kg, mean ± SEM	68.2 ± 1.04^c	70.1 ± 2.22^c	80.5 ± 2.46^{^a,^b}
Body mass index, kg/m², mean ± SEM	25.6 ± 0.38^{^b,^c}	23.7 ± 0.55^{^a,^c}	30.0 ± 0.89^{^a,^b}

ANOVA following Dunnett posthoc test, p < 0.05,
↵a versus respective value in RA column;
↵b versus respective value in SpA column;
↵c versus respective value in OA column.