Table IV.

Tissue thickness (mm) and presence/absence of fibrotic tissue.

Anatomical region	Patient group	Tissue thickness (mm)			Fibrotic tissue present	Fibrotic tissue > 4 mm thick present
		Mean	SEM	p-value*	Patients, n (%)	Patients, n (%)
Suprapatellar	Fibrosis (8)	5.1	1.0	N/A	8 (100)	5 (63)
	Revision (5)	2.8	1.7	0.022	2 (40)	2 (40)
	Primary (11)	2.2	0.8	0.011	5 (45)	4 (36)
Infrapatellar	Fibrosis	5.0	0.9	N/A	7 (88)	7 (88)
	Revision	4.2	0.7	0.193	5 (100)	2 (40)
	Primary	2.3	0.6	0.011	7 (64)	3 (27)
Medial gutter	Fibrosis	4.0	0.8	N/A	8 (100)	5 (63)
	Revision	1.5	0.9	0.110	2 (40)	2 (40)
	Primary	2.0	0.4	0.032	8 (73)	1 (9)
Lateral gutter	Fibrosis	4.2	0.5	N/A	8 (100)	5 (63)
	Revision	3.0	0.9	0.041	4 (80)	2 (40)
	Primary	1.8	0.5	0.012	7 (64)	1 (9)
Posterior medial	Fibrosis	4.3	0.6	N/A	8 (100)	3 (38)
	Revision	1.3	0.7	0.030	3 (60)	2 (40)
	Primary	1.6	0.5	0.010	6 (55)	0 (0)
Posterior lateral	Fibrosis	3.8	1.0	N/A	8 (100)	2 (25)
	Revision	2.0	1.2	0.071	3 (60)	2 (40)
	Primary	1.6	0.4	0.014	7 (64)	1 (9)
Grouped measurements	Fibrosis	4.4	0.2	N/A	N/A	N/A
	Revision	2.5	0.4	0.021	N/A	N/A
	Primary	1.9	0.2	0.013	N/A	N/A

N/A, non applicable; SEM, standard error of the mean.

^*t-test.