Table 1.

Population characteristics in our index population stratified for each disease entity and subtype of disease.

	All OIDs	Myositis	Idiopathic DA n = 79	IgG4-ROD n = 13	p
Age	51.9 ± 17.76	49.26 ± 16.08	49.67 ± 18.7	63 ± 13.83	0.0492 a
Unilateral manifestation	113 (91.2%)	28	72	13	0.42 b
Male sex	55 (44.3%)	12	38	5	0.0392 b
Biopsy	84 (67.74%)	7	64	13	0.0001 b

Unless otherwise stated, data are means ± SD or are proportions (%) or counts ^a: Welch ANOVA test. ^b: Kruskal–Wallis test.