Table 2 Correlation of TTK mRNA level and clinico-pathological indicators in the METABRIC data set

From: Meta-analysis of the global gene expression profile of triple-negative breast cancer identifies genes for the prognostication and treatment of aggressive breast cancer

Comparison

TTK low

TTK high

χ2

Tumor size

 <2 cm

346 (18%)

280 (14%)

P<1.0E−6

 >2 cm <5 cm

509 (26%)

685 (35%)

P=3.2E−5

 >5 cm

60 (3%)

92 (5%)

P=1.25E−2

Tumor Grade

 Grade 1

137 (7%)

33 (2%)

P<1.0E−6

 Grade 2

479 (25%)

296 (16%)

P<1.0E−6

 Grade 3

251 (13%)

706 (37%)

P<1.0E−6

Ki67 expression

 Low

826 (39%)

242 (11%)

 

 High

237 (11%)

831 (39%)

P<1.0E−6

Immunohistochemical subtypes

 ER-negative

71 (4%)

369 (19%)

P<1.0E−6

 ER-positive

827 (42%)

681 (35%)

 

 PR-negative

306 (15%)

637 (32%)

P<1.0E−6

 PR-positive

617 (31%)

432 (22%)

 

 HER2-negative

802 (40%)

744 (37%)

 

 HER2-positive

118 (6%)

323 (16%)

P<1.0E−6

 non-TNBC

885 (45%)

840 (43%)

 

 Triple negative (TNBC)

29 (1%)

221 (11%)

P<1.0E−6

Intrinsic subtypes

 Luminal A

552 (28%)

169 (9%)

P<1.0E−6

 Luminal B

142 (7%)

350 (18%)

P<1.0E−6

 HER2-enriched

40 (2%)

200 (10%)

P<1.0E−6

 Normal-like

161 (8%)

41 (2%)

P<1.0E−6

 Basal-like

26 (1%)

305 (15%)

P<1.0E−6

Age (years)

 <50

167 (8%)

259 (13%)

P=8.68E−4

 50–74

485 (24%)

549 (27%)

NS

 75–100

282 (14%)

253 (13%)

NS

TP53 mutation

 Wild-type

390 (48%)

331 (40%)

 

 Mutant

14 (2%)

85 (10%)

P<1.0E−6

  1. Abbreviations: ER, estrogen receptor; METABRIC, Molecular Taxonomy of Breast Cancer International Consortium; NS, not significant; PR, progesterone receptor; TNBC, triple-negative breast cancer; χ2, chi-square test performed using GraphPad Prism.