Table 1. Comparisons of four T2^* values between right (Side 1) and left knees (Side 0) over 18 weeks in the ACLX group using multiple linear regression with generalized estimating equations.

Parameter	B	Std. error	Wald chi-square	p-value
Cartilage
Sidea (Right vs. Left)	0.092	0.1427	0.412	0.521
Week 18 vs. Week 0	–0.400	0.1925	4.310	0.038
Week 13 vs. Week 0	–0.263	0.2085	1.593	0.207
Week 4 vs. Week 0	–0.340	0.2291	2.199	0.138
Side* Week 18	6.289	0.2800	504.597	<0.001
Side* Week 13	4.971	0.3558	195.238	<0.001
Side* Week 4	2.397	0.2438	96.623	<0.001
Anterior meniscus
Side (Right vs. Left)	–0.196	0.2437	0.645	0.422
Week 18 vs. Week 0	–0.267	0.1882	2.018	0.155
Week 13 vs. Week 0	–0.101	0.2062	0.241	0.624
Week 4 vs. Week 0	–0.186	0.1897	0.961	0.327
Side* Week 18	2.315	0.2997	59.666	<0.001
Side* Week 13	1.730	0.3137	30.409	<0.001
Side* Week 4	0.807	0.3310	5.936	0.015
Posterior meniscus
Side (Right vs. Left)	–0.005	0.1214	0.002	0.966
Week 18 vs. Week 0	–0.387	0.1701	5.184	0.023
Week 13 vs. Week 0	–0.107	0.1439	0.556	0.456
Week 4 vs. Week 0	–0.043	0.1646	0.068	0.794
Side* Week 18	2.219	0.2418	84.204	<0.001
Side* Week 13	1.536	0.1719	79.809	<0.001
Side* Week 4	0.934	0.2755	11.489	0.001
Subchondral bone marrow
Side (Right vs. Left)	0.181	0.1452	1.556	0.212
Week 18 vs. Week 0	–0.001	0.1385	<0.001	0.992
Week 13 vs. Week 0	0.242	0.2403	1.011	0.315
Week 4 vs. Week 0	–0.043	0.2613	0.027	0.869
Side* Week 18	1.253	0.2345	28.535	<0.001
Side* Week 13	0.586	0.2882	4.131	0.042
Side* Week 4	–0.105	0.2677	0.154	0.695

^aSide 1 = Right knee and Side 0 = Left knee (the reference knee).

^*The interaction between two variables in the models.

B: regression coefficient.