TABLE 3.

Association of Magnetic Resonance Imaging Outcomes (T1ρ and T2) With Demographic and Cluster Characteristics Over All Time Points^a

Predictor	T1ρ, ms				T2, ms
	Medial Femur		Lateral Femur		Medial Femur		Lateral Femur
	B (95% CI)	P Value	B (95% CI)	P Value	B (95% CI)	P Value	B (95% CI)	P Value
Age	0.08 (0.02 to 0.13)	.011	0.17 (0.08 to 0.26)	<.001	0.07 (0.003 to 0.14)	.041	0.15 (0.08 to 0.22)	<.001
Sex b	2.90 (1.73 to 4.07)	<.001	2.77 (1.38 to 4.16)	<.001	3.10 (1.81 to 4.39)	<.001	2.32 (1.06 to 3.59)	<.001
BMI	–0.33 (–0.53 to –0.13)	.002	–0.17 (–0.44 to 0.11)	.25	–0.26 (–0.42 to –0.10)	.001	–0.19 (–0.41 to 0.03)	.09
Meniscectomy c	0.19 (–1.60 to 1.98)	.83	–0.62 (–2.75 to 1.51)	.57	–0.58 (–1.91 to 0.75)	.39	–0.82 (–2.55 to 0.90)	.35
Marx	0.45 (0.23 to 0.68)	<.001	0.30 (0.03 to 0.58)	.031	0.27 (0.02 to 0.53)	.038	0.24 (–0.01 to 0.49)	.06
Allograft d	1.23 (–0.01 to 2.44)	.051	1.22 (0.17 to 2.28)	.023	0.83 (–0.28 to 1.95)	.14	0.70 (–0.39 to 1.79)	.21
Cluster e	1.36 (–0.06 to 2.80)	.06	0.61 (–0.95 to 2.16)	.44	0.30 (–1.02 to 1.63)	.65	0.05 (–1.24 to 1.34)	.94
	Medial Tibia		Lateral Tibia		Medial Tibia		Lateral Tibia
Age	0.10 (0.01 to 0.20)	.034	0.09 (–0.08 to 0.26)	.32	0.99 (0.01 to 0.19)	.027	0.02 (–0.10 to 0.14)	.71
Sex b	1.84 (0.18 to 3.51)	.030	4.04 (2.26 to 5.81)	<.001	1.79 (0.29 to 3.29)	.02	3.44 (2.14 to 4.75)	<.001
BMI	–0.63 (–0.91 to –0.36)	<.001	–0.01 (–0.28 to 0.27)	.97	–0.44 (–0.70 to –0.18)	.001	–0.02 (–0.20 to 0.16)	.82
Meniscectomy c	3.04 (1.37 to 4.70)	<.001	0.62 (–0.99 to 2.33)	.45	2.24 (1.01 to 3.48)	<.001	0.99 (–0.12 to 2.11)	.08
Marx	0.59 (0.25 to 0.92)	.001	0.26 (–0.26 to 0.77)	.33	0.44 (0.17 to 0.71)	.002	–0.01 (–0.35 to 0.36)	.97
Allograft d	0.08 (–1.43 to 1.59)	.92	1.05 (0.02 to 2.08)	.045	0.62 (–0.54 to 1.79)	.30	0.31 (–0.58 to 1.19)	.50
Cluster e	3.29 (1.44 to 5.14)	.001	–0.11 (–1.68 to 1.46)	.89	1.48 (0.13 to 2.83)	.032	–0.28 (–1.42 to 0.85)	.62
	Patella		Trochlea		Patella		Trochlea
Age	0.20 (0.05 to 0.36)	.012	0.14 (0.04 to 0.25)	.007	0.07 (–0.05 to 0.19)	.27	0.1 (0.03 to 0.18)	.007
Sex b	4.17 (2.56 to 5.78)	<.001	4.50 (3.29 to 5.72)	<.001	3.96 (2.53 to 5.39)	<.001	3.69 (2.51 to 4.87)	<.001
BMI	–0.26 (–0.52 to –0.01)	.044	–0.15 (–0.42 to 0.12)	.26	–0.11 (–0.31 to 0.09)	.29	–0.15 (–0.34 to 0.04)	.12
Meniscectomy c	0.13 (–2.15 to 2.42)	.91	–0.88 (–2.71 to 0.95)	.35	0.08 (–2.01 to 2.16)	.94	–1.59 (–2.89 to –0.29)	.017
Marx	0.64 (0.30 to 0.99)	<.001	0.53 (0.28 to 0.79)	<.001	0.40 (0.07 to 0.73)	.019	0.38 (0.14 to 0.62)	.002
Allograft d	0.98 (–0.20 to 2.17)	.10	0.72 (–0.52 to 1.95)	.26	0.94 (–0.20 to 2.08)	.11	0.58 (–0.80 to 1.95)	.41
Cluster e	2.46 (0.68 to 4.24)	.007	1.09 (–0.35 to 2.53)	.14	1.74 (0.11 to 3.36)	.037	0.35 (–0.88 to 1.59)	.58

^aEach entry indicates the increase in relaxation time (ms) for every unit increase of that factor. Bold indicates P < .05. BMI, body mass index.

^bA positive B value indicates that females have higher relaxation times.

^cA positive B value indicates higher relaxation times for those who had meniscectomy.

^dA positive B value indicates higher relaxation times for those with allograft versus those with autograft.

^eA positive B value indicates higher relaxation times in the high sulfated glycosaminoglycan group.