Table 3 Comparisons of fat fraction and cross-sectional area at different level among Charcot-Marie-Tooth disease type 1A patients and healthy volunteers.

Group	Comparison	Fat fraction			Cross-sectional area
Group	Comparison	Estimate	Standard error	p value	Estimate	Standard error	p value
CMT1A patients	Level 1 vs. 2^†	4.3676	1.4212	0.0064^§	9.1118	2.5669	0.0012^§
	Level 1 vs. 3^†	6.9519	1.4818	< 0.0001^§	3.2417	3.7392	1.0000
	Level 2 vs. 3^‡	2.5843	1.6987	0.3845	− 5.8701	3.2702	0.2179
Volunteers	Level 1 vs. 2^†	1.8128	1.3758	0.5629	3.9542	2.5211	0.3504
	Level 1 vs. 3^†	− 0.6057	1.7962	1.0000	− 4.8453	1.6050	0.0076^§
	Level 2 vs. 3^‡	− 2.4185	1.8185	0.5506	− 8.7994	2.1882	0.0002^§

Analyzed using generalized estimating equation with adjustment for sides (L/R) and reviewers.
*Corrected with Bonferroni method due to multiple comparisons.
^†Level 1 used as reference.
^‡Level 2 used as reference.
^§Indicates statistical significance.

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