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Effects of zinc supplementation on fatigue and quality of life in patients with colorectal cancer. | LitMetric

Objective: To investigate the effects of oral zinc supplementation on fatigue intensity and quality of life of patients during chemotherapy for colorectal cancer.

Methods: A prospective, randomized, double-blinded, placebo-controlled study was conducted with 24 patients on chemotherapy for colorectal adenocarcinoma in a tertiary care public hospital. The study patients received zinc capsules 35mg (Zinc Group, n=10) or placebo (Placebo Group, n=14) orally, twice daily (70mg/day), for 16 weeks, from the immediate postoperative period to the fourth chemotherapy cycle. Approximately 45 days after surgical resection of the tumor, all patients received a chemotherapeutic regimen. Before each of the four cycles of chemotherapy, the Functional Assessment of Chronic Illness Therapy-Fatigue scale was completed. We used a linear mixed model for longitudinal data for statistical analysis.

Results: The scores of quality of life and fatigue questionnaires were similar between the groups during the chemotherapy cycles. The Placebo Group presented worsening of quality of life and increased fatigue between the first and fourth cycles of chemotherapy, but there were no changes in the scores of quality of life or fatigue in the Zinc Group.

Conclusion: Zinc supplementation prevented fatigue and maintained quality of life of patients with colorectal cancer on chemotherapy.

Objetivo: Investigar os efeitos da suplementação oral de zinco sobre a intensidade da fadiga e a qualidade de vida de pacientes durante a quimioterapia para neoplasia colorretal.

MÉtodos: Estudo prospectivo, randomizado, controlado e duplo-cego conduzido em um hospital universitário público terciário, com 24 pacientes em regime quimioterápico para adenocarcinoma colorretal. Os pacientes receberam cápsulas de zinco 35mg (Grupo Zinco, n=10) ou placebo (Grupo Placebo, n=14) por via oral, duas vezes ao dia (70mg/dia), durante 16 semanas, desde o período pós-operatório imediato até o quarto ciclo de quimioterapia. Todos os pacientes receberam quimioterapia por aproximadamente 45 dias após a ressecção cirúrgica do tumor. A escala Functional Assessment of Chronic Illness Therapy-Fatigue foi preenchida antes de cada um dos quatro ciclos de quimioterapia. Utilizou-se o modelo de regressão linear misto para dados longitudinais para análise estatística.

Resultados: Os escores de qualidade de vida e de fadiga foram semelhantes entre os grupos de estudo durante os ciclos de quimioterapia. O Grupo Placebo apresentou piora da qualidade de vida e da fadiga entre o primeiro e o quarto ciclos de quimioterapia, mas não houve mudança nos escores de qualidade de vida e fadiga no Grupo Zinco.

ConclusÃo: A suplementação com zinco previne a fadiga e preserva a qualidade de vida de pacientes em quimioterapia para neoplasia colorretal.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5433302PMC
http://dx.doi.org/10.1590/S1679-45082017AO3830DOI Listing

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