Expression of the zinc-finger transcription factor Osterix (SP7) in invasive breast cancer and its prognostic significance.

Linear by linear χ 2 tests were performed to identify linear trends; low levels of nuclear expression of osterix had a significant trend with increasing tumour grade (χ 2 = 12.969, d.f.=2, P < 0.001), increasing pleomorphism variation score (χ 2 = 7.120, d.f.=2, P = 0.008), and worse NPI prognostic group (χ 2 = 10.831, d.f.=2, P < 0.001) at the time of presentation; data is shown in Table 1 .

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