Relationship between radiographic changes and symptoms or physical examination findings in subjects with symptomatic medial knee osteoarthritis: a three-year prospective study

Table 1 Baseline characteristics of the subjects by radiographic progression

	Subjects with progressed joints^a	Subjects with non-progressed joints^b	p value^c
Number of subjects	26 (34 joints)	42 (72 joints)
Male	3 (4 joints)	7 (14 joints)	0.730 (0.413)^d
Female	23 (30 joints)	35 (58 joints)
Age	70.6 ± 9.4	71.7 ± 6.5	0.606
BMI	25.7 ± 2.8	25.2 ± 2.2	0.883
JKOM (total score)	63.6 ± 16.2	58.7 ± 15.1	0.389
K-L score	1.84 ± 0.64	1.85 ± 0.67	0.937
JSW (mm)	2.86 ± 1.18	3.18 ± 1.21	0.411
Osteophyte score	3.96 ± 2.18	3.71 ± 2.21	0.827

^asubjects who had at least one progressed joint; ^bsubejcts without progressed joints; ^cdetermined by Fischer's exact test; ^dsex ratio of subjects (joints). BMI: body mass index; JKOM: Japanese Knee Osteoarthritis Measure (reference 26); JSW: joint space width; K-L score: Kellgren-Lawrence score (reference 5).