Noninvasive prediction of microsatellite instability in stage II/III rectal cancer using dynamic contrast-enhanced magnetic resonance imaging radiomics

Table 1 Baseline characteristics of the study cohort, mean ± SD/n (%)

Characteristic	MSI-H (n = 30)	MSS/MSI-L (n = 90)	P value
Age (years)	61.8 ± 11.9	62.5 ± 12.6	0.452
Age (years), range	37-84	35-85
Gender
Male	20 (66.7)	58 (64.4)	0.678
Female	10 (33.3)	32 (35.6)
Tumor location
Mid-rectum	15 (50)	45 (50)	0.543
Lower rectum	10 (33.3)	30 (33.3)
Upper rectum	5 (16.7)	15 (16.7)
Clinical stage
Stage II	12 (40)	38 (42.2)	0.789
Stage III	18 (60)	52 (57.8)
Tumor size (cm)	4.1 ± 1.6	4.2 ± 1.4	0.612
Tumor size (cm), range	2.0-7.0	2.0-7.5
Lymph node metastasis
Present	15 (50)	45 (50)	0.987
Absent	15 (50)	45 (50)
Histological type
Adenocarcinoma	28 (93.3)	84 (93.3)	0.992

MSI-H: Microsatellite instability-high; MSS: Microsatellite stability; MSI-L: Microsatellite instability-low.