Intra-articular injection of two different doses of autologous bone marrow mesenchymal stem cells versus hyaluronic acid in the treatment of knee osteoarthritis: multicenter randomized controlled clinical trial (phase I/II)

Table 1 Baseline characteristics of patients

	Control	BM-MSCs
	Control	Low-dose	High-dose
N	10	10	10
Age (years)	60.3 (55.1, 61.1)	65.9 (59.5, 70.6)	57.8 (55.0, 60.8)
Males, n (%)	7 (70)	4 (40)	8 (80)
BMI (kg/m²)	29.6 (26.2, 30.8)	27.1 (24.4, 31.2)	28.5 (25.8, 31.0)
Time since OA diagnosis (years)	6 (2, 8)	9 (4, 12)	10 (7, 15)
K-L 2, n (%)	4 (40)	1 (10)	3 (30)
K-L 3, n (%)	2 (20)	2 (20)	3 (30)
K-L 4, n (%)	4 (40)	7 (70)	4 (40)

Unless specified, data are presented as median [interquartile range (IQR)]. OA osteoarthritis, K–L Kellgren and Lawrence grading scale of severity of knee OA

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