For the overall sample, there was a marginally statistically significant association between low nuclear SMAD4 IHC levels and poorer survival of these patients (log-rank, P = 0.07) (data not shown).
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Prognostic value of loss of heterozygosity and sub-cellular localization of SMAD4 varies with tumor stage in colorectal cancer.
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The sentences
Although there was an association for stage I patients, this relationship failed to reach statistical significance due to only seven events (deaths due to CRC) among these patients.
Further, a borderline significant shorter survival was found for those with low SMAD4 protein levels in the nuclei with Smad4 LOH positive in stage III CRC patients, indicating that Smad4 is a tumor suppressor gene for these 18q21 deletions at the Smad4 locus.