Avtor/Urednik		Goldvaser, Hadar; Barnes, Tristan A.; Šeruga, Boštjan; Cescon, David W.; Ocaña, Alberto; Ribnikar, Domen; Amir, Eitan
Naslov		Toxicity of extended adjuvant therapy with aromatase inhibitors in early breast cancer
Tip		članek
Vol. in št.		Letnik 110, št. 1
Leto izdaje		2018
ISSN		0027-8874 - Journal of the National Cancer Institute
Jezik		eng
Abstrakt		A number of randomized controlled trials (RCTs) have reported improvement in breast cancer outcomes from extending treatment with aromatase inhibitors (AIs) beyond the initial five years after diagnosis. However, the toxicity profile of extended AIs is uncertain. Methods: We identified RCTs that compared extended AIs to placebo or no treatment using MEDLINE and a review of abstracts from key conferences between 2013 and 2016. Odds ratios (ORs), 95% confidence intervals (CIs), absolute risks, and the number needed to harm (NNH) were computed for prespecified safety and tolerability outcomes including cardiovascular events, bone fractures, second cancers (excluding new breast cancer), treatment discontinuation for adverse events, and death without recurrence. All statistical tests were two-sided. Results: Seven trials comprising 16349 patients met the inclusion criteria. Longer treatment with AIs was associated with increased odds of cardiovascular events (OR=1.18, 95% CI=1.00 to 1.40, P = .05, NNH = 122), bone fractures (OR=1.34, 95% CI=1.16 to 1.55, P < .001, NNH = 72), and treatment discontinuation for adverse events (OR=1.45, 95% CI=1.25 to 1.68, P < .001, NNH = 21). Longer treatment with AIs did not influence the odds of either second malignancy (OR=0.93, 95% CI=0.73 to 1.18, P = .56) or deaths without breast cancer recurrence (OR=1.11, 95% CI=0.90 to 1.36, P = .34). Conclusions: Extended treatment with AIs is associated with an increased risk of cardiovascular events and bone fractures. There is no statistically significant increase in deaths without breast cancer recurrence among patients receiving longer treatment with AIs. These data should be taken into account when considering extended adjuvant AIs.
Proste vsebinske oznake		rak dojke zgodnji rak dojke adjuvantna terapija toksičnost breast cancer early breast cancer adjuvant therapy toxicity