Table 2.

The numbers of patients with knee cartilage defects who underwent the procedures shown. Patients were grouped based on the types of procedures performed at baseline. In some cases, more than one procedure was performed in a single knee; thus, the number of procedures exceeds the number of patients

	Subgroup 1			Subgroup 2			Subgroup 3			Subgroup 4			All patients
Cartilage repair: a	No			No			Yes			Yes
Ligament/meniscus surgery:	No			Yes			No			Yes
	(n = 25)			(n = 39)			(n = 21)			(n = 13)			(n = 98) b
Time of procedures: c	B	BL	A	B	BL	A	B	BL	A	B	BL	A	B	BL	A
Cartilage repair:
Microfracture	1						1	11	1	1	10	2	3	21	3
Osteochondral cylinder transfer			1					2	1					2	2
Biopsy preceding ACI d			1			1		4	1		3	1		7	4
Fixation of osteochondral fragment								4						4
Other procedures:
Diagnostic arthroscopy	6	13	3	7	6		9			2			24	19	3
Debridement of cartilage injury		7	1		3	1			3			1		10	6
Ligament reconstruction	1			2	10	1	1			2	2	2	6	12	3
Meniscal resection	1			7	24	2			2	1	5		9	29	4
Other	2	5	3			2			1			1	2	5	7
No information	3			2									5

^a Cartilage repair was defined as: an autologous chondrocyte implantation (with a preceding biopsy), an osteochondral cylinder transfer, microfracture, or fixation of osteochondral fragment.

^b All patients fulfilling the inclusion criteria were included in the table (n = 98). Of these, 2 had died, 12 were lost to follow-up, and 84 were included in the final follow-up.

^c The time the procedures were performed, expressed relative to the baseline assessment. B: before baseline; BL: at baseline; A: after baseline (during follow-up).

^d ACI: autologous chondrocyte implantation.