T2 mapping and fat quantification of lumbar paraspinal muscle in ankylosing spondylitis: a case control study

Table 4 Correlation between quantitative MRI and clinical assessments in AS group

		Disease duration^a	ESR	CRP	BASFI	BASDAI	Age
L3/4 MF	FF	0.129	0.274	0.061	0.130	-0.145	0.415*
	T2_non-fatsat value	0.281	0.599**	0.319	0.371*	0.064	0.220
	T2_fatsat value	-0.134	0.419**	0.307	0.410*	0.281	-0.067
	CSA	0.059	-0.503**	-0.114	-0.157	0.019	-0.070
L3/4 ES	FF	0.118	0.293	0.059	0.077	-0.125	0.362*
	T2_non-fatsat value	0.149	0.511**	0.220	0.356*	-0.025	0.168
	T2_fatsat value	-0.293	0.426**	0.167	0.379*	0.236	-0.267
	CSA	0.228	-0.216	-0.006	-0.261	0.021	0.260
L4/5 MF	FF	0.147	0.232	0.055	0.186	-0.030	0.394*
	T2_non-fatsat value	0.224	0.503**	0.257	0.227	0.082	0.239
	T2_fatsat value	0.152	0.418*	0.189	0.067	0.090	0.063
	CSA	0.054	-0.409*	-0.047	-0.152	0.215	0.135
L4/5 ES	FF	0.153	0.286	0.092	0.111	-0.065	0.395*
	T2_non-fatsat value	0.038	0.385*	0.098	0.217	0.124	0.221
	T2_fatsat value	-0.323	0.333*	-0.021	0.170	0.134	-0.060
	CSA	0.305	-0.210	-0.018	-0.109	-0.060	0.232

Note: r, Spearman’s correlation test coefficient; *, P < 0.05; **, P < 0.01
ESR Erythrocyte sedimentation rate, CRP C-reactive protein, BASDAI Bath AS disease activity index, FF Fat fraction, MF Multifidus, ES Erector spinae, CSA cross-sectional area
^a, partial correlation testing adjusting for age

ISSN: 1471-2474