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"In this paper we outline and evaluate a nine-parameter version of the Heligman-Pollard formula. In our applications, using mortality data for five European countries we found that this version provides closer fits to empirical mortality data than the classical eight-parameter formula, thus eliminating a source of systematic error in this latter formula."

Aim: We evaluated whether the concurrent β-blocker use in early breast cancer patients influenced the outcome in terms of preventing tumor recurrence after adjuvant chemotherapy. Methods: We retrospectively reviewed the medical records of 610 patients with breast cancer. Thereafter, we compared overall disease-free survival (DFS) between β-blocker users and nonusers. Results: Those not receiving β-blockers had a relatively longer mean DFS (10.8 vs. 9.7 years), although the difference did not reach statistical significance (p = 0.651). When the survival analysis was adjusted for age, tumor stage, hormone receptor status and HER2 status, the results remained unaltered, suggesting that β-blocker use did not significantly improve overall DFS (HR, 0.849; 95% CI, 0.537-1.343; p = 0.485). Conclusion: Our findings failed to confirm previous results indicating a potential antitumor effect of β-blockers.

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