Table 1.

Comparison of baseline characteristics between two groups (n = 60).

Characteristic	BRRM (n = 30)	Non-BRRM (n = 30)	P value
Age (yr), mean ± SD	56.4 ± 10.2	56.0 ± 11.3	.88
Sex, n (%)
Male	17 (56.7)	16 (53.3)	.80
Female	13 (43.3)	14 (46.7)
Affected side, n (%)
Left	10 (33.3)	11 (36.7)	.89
Right	15 (50.0)	13 (43.3)
Bilateral	5 (16.7)	6 (20.0)
Course of disease (yr), mean ± SD	5.0 ± 2.2	4.7 ± 2.1	.55
Outpatient, n (%)	12 (40.0)	14 (46.7)	.60
Inpatient, n (%)	18 (60.0)	16 (53.3)
Kellgren-Lawrence			.72
0	2 (6.7)	1 (3.3)
I	5 (16.7)	8 (26.7)
II	10 (33.3)	9 (30.0)
III	13 (43.3)	12 (40.0)

BRRM = Bad Ragaz ring method, SD = standard deviation.