Table 1. Demography of microsatellite stable (MSS) and microsatellite instability-high (MSI-high) tumors.

	MSS (n = 113)	MSI-H (n = 29)	P value
Median age (range)	49 (25–84)	47 (26–89)	0.13
Gender			0.54
female	55 (49%)	16 (55%)
male	58 (51%)	13 (45%)
Location of primary tumors*			<0.01
right	35 (32%)	18 (64%)
left	73 (68%)	10 (36%)
Stage†			<0.01
I-III	53 (47%)	22 (76%)
IV	59 (53%)	7 (24%)
Specimens tested			<0.01
primary	84 (74%)	28 (97%)
distant metastasis	29 (26%)	1 (3%)

^*Location of primary tumors was not known in 5 MSS tumors and 1 MSI-H tumor.

^†Staging of tumors was not known on one MSS tumor.