Table 3.

Comparison of our study with others in other countries or ethnicities for mismatch repair protein expression in unselected colorectal cancer patients

Authors	Country or ethnic group	Evaluated patients, n	MLH1-protein negative expression, n (%)	MSH2-protein negative expression, n (%)
Lindor et al [22]a	Minnesota, US	255	48 (18.8)	3 (1.2)
De Jesus-Monge et al	Hispanics from Puerto Rico	164	1 (0.6)	6 (3.7)
Brim et al [47]	Iran	25	10 (40)	1 (4)
Ashktorab et al [48]	African	b	16 of 34 (47.1)c	12 of 31 (47.1)c
	Americans		3 of 34 (8.8)d	1 of 31 (8.8)d
Pandey et al [49]	India	46	7 (15.2)	1 (2.2)
Ashktorab et al [50]	Oman	49	5 (10.2)e	3 (6.1)e
Brim et al [47]	Oman	61	19 (31.1)	5 (8.2)
Erdamar et al [51]	Turkey	74	29 (39.2)	7 (9.5)
Brim et al [47]	African Americans	b	26 of 76 (34.2)	8 of 74 (10.8)
Jin et al [52]	China	146	17 (11.6)	9 (6.2)
Jensen et al [53]	Denmark	262	37 (14.1)	3 (1.1)
Boardman et al [54]	Alaska Natives	329	42 (12.8)	3 (0.9)
Molaei et al [37]	Iran	343	19 (5.5)	24 (7)
Wright et al [55]	New Zealand	458	80 (17.5)	9 (2)
Coggins et al [56]	England	732	52 (7.1)	5 (0.7)
Xicola et al [57]	Spain	1058	59 (5.6)	22 (2.1)
Piñol et al [58]	Spain	1222	60 (4.9)	21 (1.7)

^aRepresentative sample for United States

^bSee columns to the right to see the number of evaluated patients for each protein

^cPartially negative expression

^dCompletely negative expression

^ePartially or completely negative expression