. 2013 Oct 18;8(10):e76658. doi: 10.1371/journal.pone.0076658

Table 5. Comparisons of T2^* values in femoral subchondral bone marrow among three groups over 18 weeks using multiple linear regression with generalized estimating equations.

Subchondral bone marrow Parameter	B	Std. error	Wald chi-square	p-value
(Intercept)	6.406	0.0812	6218.056	<0.001
Group 3^a (Sham vs. Control)	–0.064	0.1372	0.220	0.639
Group 2^a (ACLX vs. Control)	0.108	0.1327	0.666	0.414
Week 18 vs. Week 0	–0.001	0.1380	0.000	0.993
Week 13 vs. Week 0	0.201	0.1539	1.699	0.192
Week 4 vs. Week 0	0.101	0.1262	0.637	0.425
Group 3^* Week 18	0.043	0.1971	0.049	0.825
Group 3^* Week 13	–0.255	0.2182	1.364	0.243
Group 3^* Week 4	–0.128	0.2150	0.356	0.550
Group 2^* Week 18	1.253	0.2574	23.687	<0.001
Group 2^* Week 13	0.627	0.3093	4.106	0.043
Group 2^* Week 4	–0.249	0.1876	1.759	0.185

Group 1 = Control group; Group 2 = ACLX group; Group 3 = Sham group.

The interaction between two variables in the models.

B: regression coefficient.

Table 5. Comparisons of T2* values in femoral subchondral bone marrow among three groups over 18 weeks using multiple linear regression with generalized estimating equations.