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MINI 28 - Psychological Impact of Lung Cancer and its Treatment (ID 150)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Palliative and Supportive Care
- Presentations: 1
MINI28.12 - A Meta-Analysis of Clinical Trials on the Risk of Hyponatraemia in Cancer Patients Treated with Targeted Therapies (ID 2994)
16:45 - 18:15 | Author(s): E. Nunzi
The incidence of hyponatremia in non-small cell lung cancer (NSCLC) varies from 1% to 50%. Early recognition and a prompt treatment of this electrolytic imbalance could prevent clinical complications and improve survival. Hyponatraemia has recently been reported with targeted therapies in cancer patients. Aim of the study was to perform an up-to-date meta-analysis in order to determine the incidence and relative risk (RR) in cancer patients treated with these agents.
The published scientific literature regarding hyponatremia in peer-review journals was extensively reviewed using the MEDLINE and Pubmed databases till January 2015. Eligible studies were selected according to PRISMA statement. Summary incidence, RR, and 95% Confidence Intervals were calculated using random-effects or fixed-effects models based on the heterogeneity of selected studies.
A total of 4803 potentially relevant trials were identified: of them, 13 randomized phase III studies were included in this meta-analysis. A total number of 6670 patients treated with 8 distinct targeted agents were available for this analysis: 648 patients had NSCLC and were treated with afatinib or gefitinib (vs. placebo) and vorinostat + chemotherapy (vs. placebo + chemotherapy). The highest incidences of all-grade hyponatraemia were observed with the combination of brivanib and cetuximab (63.4) and pazopanib (31.7), while the lowest incidence was reported by afatinib (1.7). The highest incidence of high-grade hyponatraemia was reported by cetuximab (34.8), whilst the lowest incidences were reported by gefitinib (1.0). Summary RR of developing all-grade and high-grade hyponatraemia with targeted agents was 1.36 and 1.52, respectively. The highest RRs of all-grade and high-grade hyponatraemia were associated with brivanib (6.5 and 5.2, respectively). Grouping by drug category, the RR of high-grade hyponatraemia with angiogenesis inhibitors was 2.69 compared to anti-Epidermal Growth Factor Receptors Tirosine Kinase Inhibitors or monoclonal Antibodies (1.12).
Treatment with biological therapy in cancer patients is associated with a significant increased risk of hyponatraemia, therefore frequent clinical monitoring should be emphasized when managing these and newer targeted agents.
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