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Table 1 Distribution of RAS-BRAF mutations according to the characteristics of CRC patients

From: Prognostic impact of KRAS, NRAS, BRAF, and PIK3CA mutations in primary colorectal carcinomas: a population-based study

Characteristic

No.

%

KRAS mut

NRAS mut

BRAF mut

All mut

Sex

Male

772

60.1

253 (32.8 %)

31 (4.0 %)

13 (1.7 %)

297 (39.8 %)

Female

512

39.9

204 (39.8 %)

22 (4.3 %)

14 (2.7 %)

240 (46.9 %)

Anatomical tumour site

Right-transverse colon

441

34.3

148 (35.6 %)

18 (4.1 %)

9 (2.0 %)

175 (39.7 %)

Left colon

516

40.2

185 (35.9 %)

21 (4.1 %)

10 (1.9 %)

216 (41.9 %)

Rectum

327

25.5

124 (37.9 %)

14 (4.3 %)

8 (2.4 %)

146 (44.6 %)

Disease stage at diagnosis

Stage II (T3–4N0M0)

286

22.3

108 (37.8 %)

11 (3.8 %)

6 (2.1 %)

125 (43.7 %)

Stage III (TXN1–3M0)

567

44.1

191 (33.7 %)

24 (4.2 %)

9 (1.6 %)

224 (39.5 %)

Stage IV (TXNXM1)

431

33.6

158 (36.7 %)

18 (4.2 %)

12 (2.8 %)

188 (43.6 %)

Tumour grading

Well differentiated

138

10.7

49 (35.5 %)

7 (5.1 %)

3 (2.2 %)

59 (42.8 %)

Moderately differentiated

1041

81.1

370 (35.5 %)

41 (3.9 %)

21 (2.0 %)

432 (41.5 %)

Poorly differentiated

105

8.2

38 (36.2 %)

5 (4.8 %)

3 (2.9 %)

46 (43.8 %)

Age, years

≤50

126

9.8

47 (37.3 %)

10 (7.9 %)

3 (2.4 %)

60 (47.6 %)

51–60

325

25.3

118 (36.3 %)

12 (3.7 %)

6 (1.8 %)

136 (41.8 %)

61–70

492

38.3

173 (35.2 %)

19 (3.9 %)

9 (1.8 %)

201 (40.9 %)

>70

341

26.6

119 (34.9 %)

12 (3.5 %)

9 (2.6 %)

140 (41.1 %)