European Radiology Experimental

Table 1 Mean and standard deviation of PDFF (%) and volume (cm³) of each muscle compartment in the training and test dataset

From: Automated assessment of paraspinal muscle fat composition based on the segmentation of chemical shift encoding-based water/fat-separated images

	Training set (n = 14)		Testing set (n = 6)
	Fat fraction	Volume	GT fat fraction	AS fat fraction	Δ fat fraction	p	GT volume	AS volume	p
Right erector spinae	6.66 ± 2.07	241 ± 56	5.10 ± 1.09	5.49 ± 1.14	0.39	0.012	235 ± 60	287 ± 74	0.012
Left erector spinae	6.29 ± 2.19	252 ± 53	3.44 ± 1.88	4.02 ± 1.90	0.58	0.012	238 ± 56	293 ± 74	0.012
Right quadratus lumborum	6.44 ± 5.21	45 ± 10	5.36 ± 1.22	4.86 ± 0.72	0.50	0.025	43 ± 13	45 ± 14	0.263
Left quadratus lumborum	7.46 ± 5.82	51 ± 13	4.24 ± 3.27	3.69 ± 2.43	0.55	0.123	47 ± 14	47 ± 15	0.889
Right psoas	4.19 ± 2.65	121 ± 28	4.01 ± 1.68	3.82 ± 1.56	0.19	0.093	117 ± 35	130 ± 45	0.025
Left psoas	4.04 ± 3.87	119 ± 33	2.98 ± 2.58	2.96 ± 2.22	0.02	0.575	109 ± 35	135 ± 51	0.017

p values refer to the comparison of automatic segmentation (AS) and ground truth (GT) results in the test dataset

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