Table 1.

Preoperative characteristics

Characteristics	Total OA Group (n = 80)	Hip OA (n = 36)	Knee OA (n = 44)	p Value
Age (years)	61.8 ± 11.2	61.5 ± 12.8	62.1 ± 9.7	0.818
Gender (women; %)	58.8	63.9	54.5	0.401
Body mass index (kg/m2)	29.6 ± 5.5	26.6 ± 4.2	32.1 ± 5.3	0.000
Side of surgery (left; %)	48.8	52.8	45.5	0.517
Indication for surgery (number; %)		Primary OA: 32 (88.9)	Primary OA: 40 (90.9)
		Secondary OA: 4 (11.1)	Secondary OA: 4 (9.1)
Kellgren and Lawrence (number; %)		No OA : 0 (0)	No OA: 0 (0)
		Doubtful: 2 (5.6)	Doubtful: 0 (0)
		Mild: 2 (5.6)	Mild: 2 (4.5)
		Moderate: 10 (27.8)	Moderate: 13 (29.5)
		Severe: 22 (61.1)	Severe: 29 (65.9)

Values are mean ± standard deviation unless otherwise indicated; OA = osteoarthritis.