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    Weekly versus tri-weekly paclitaxel with carboplatin for first-line treatment in women with epithelial ovarian cancer

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    Authors
    Ngoi, N. Y.
    Syn, N. L.
    Goh, R. M.
    Goh, B. C.
    Huang, R. Y.
    Soon, Y. Y.
    James, E.
    Cook, A.
    Clamp, A.
    Tan, D. S.
    Affiliation
    Department of Haematology-Oncology, National University Cancer Institute, Singapore, Singapore. Department of Surgery, University Surgical Cluster, National University Health System, Singapore, Singapore. Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore. Department of Radiation Oncology, National University Cancer Institute, Singapore, Singapore. Medical Research Council Clinical Trials Unit, Institute of Clinical Trials and Methodology, University College London, London, UK. Department of Medical Oncology, The Christie NHS Foundation Trust and University of Manchester, Manchester, UK.
    Issue Date
    2022
    
    Metadata
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    Abstract
    Background Epithelial ovarian cancer is the sixth most common cancer worldwide: 295,414 new cases were diagnosed in 2018, with 184,799 deaths. The lack of an effective screening strategy has led to the majority of women being diagnosed at an advanced stage. For these women, intravenous carboplatin combined with paclitaxel for six cycles is widely accepted as the standard first‐line treatment for epithelial ovarian cancer, in combination with debulking surgery. However, there is conflicting evidence regarding the optimal dosing schedule of paclitaxel when combined with carboplatin in this setting. Objectives To compare the efficacy and tolerability of intravenous weekly paclitaxel with that of tri‐weekly paclitaxel, in combination with intravenous carboplatin, as first‐line treatment for epithelial ovarian cancer (defined as epithelial ovarian, primary peritoneal and fallopian tube cancer). Search methods We searched CENTRAL, MEDLINE, and Embase databases for relevant studies up to 15 November 2021, using keywords and MeSH terms. We additionally handsearched conference libraries, online clinical trial databases and screened through lists of retrieved references. Selection criteria We Included randomised controlled trials (RCTs) comparing weekly paclitaxel in combination with carboplatin versus tri‐weekly paclitaxel in combination with carboplatin, for treatment of newly‐diagnosed epithelial ovarian cancer. Data collection and analysis We used the hazard ratio (HR) to estimate the primary efficacy outcomes progression‐free (PFS) and overall survival (OS). We used the risk ratio (RR) to estimate the primary toxicity outcome of severe neutropenia and secondary outcomes of quality of life (QoL) and treatment‐related adverse events. Two review authors independently selected studies, extracted data, and assessed risk of bias, using standard Cochrane methodological procedures. We included individual participant data (IPD) from one of the included studies, ICON‐8, provided by the study team. We analysed data using a random‐effects model in Review Manager 5.4 software. Additionally, we reconstructed IPD for PFS and OS data from published Kaplan‐Meier curves from all studies and subsequently pooled these to analyse the two primary efficacy outcomes. Main results From 2469 records, we identified four eligible RCTs with data for 3699 participants. All eligible studies were included in the main meta‐analysis and reported on PFS and OS. There was likely a slight improvement in PFS when paclitaxel was dosed weekly compared to tri‐weekly (HR 0.89, 95% confidence interval (CI) 0.81 to 0.98; 4 studies, 3699 participants; moderate‐certainty evidence). We found little to no improvement in OS when paclitaxel was dosed weekly compared to tri‐weekly (HR 0.92, 95% CI 0.79 to 1.06; 4 studies, 3699 participants; high‐certainty evidence). There was likely little to no difference in high‐grade (grade 3 or 4) neutropenia when paclitaxel was dosed weekly compared to tri‐weekly (RR 1.11, 95% CI 0.86 to 1.43; 4 studies, 3639 participants; moderate‐certainty evidence). However, weekly paclitaxel increased high‐grade (grade 3 or 4) anaemia when compared to tri‐weekly dosing (RR 1.57, 95% CI 1.12 to 2.20; 4 studies, 3639 participants; high‐certainty evidence). There may be little to no difference in high‐grade neuropathy when paclitaxel was dosed weekly compared to tri‐weekly (RR 1.12, 95% CI 0.64 to 1.94; 4 studies, 3639 participants; low‐certainty evidence). The overall risk of detection bias and performance bias was low for OS, but was unclear for other outcomes, as treatments were not blinded. The risk of bias in other domains was low or unclear. We note that OS data were immature for three of the included studies (GOG‐0262, ICON‐8 and MITO‐7). Authors' conclusions Weekly paclitaxel combined with carboplatin for first‐line treatment of epithelial ovarian cancer likely improves PFS slightly (moderate‐certainty evidence) but not OS (high‐certainty evidence), compared to tri‐weekly paclitaxel combined with carboplatin. However, this was associated with increased risk for high‐grade anaemia, treatment discontinuation, dose delays and dose omissions (high‐ to low‐certainty evidence). Our findings may not apply to women receiving bevacizumab in first‐line therapy, those receiving treatment in the neo‐adjuvant setting, or those with rare subtypes of clear cell or mucinous ovarian cancer.
    Citation
    Ngoi NY, Syn NL, Goh RM, Goh BC, Huang RY-J, Soon YY, et al. Weekly versus tri-weekly paclitaxel with carboplatin for first-line treatment in women with epithelial ovarian cancer [Internet]. Vol. 2022, Cochrane Database of Systematic Reviews. Wiley; 2022.
    Journal
    Cochrane Database Syst Rev
    URI
    http://hdl.handle.net/10541/625128
    DOI
    10.1002/14651858.CD012007.pub2
    PubMed ID
    35188221
    Additional Links
    https://dx.doi.org/10.1002/14651858.CD012007.pub2
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.1002/14651858.CD012007.pub2
    Scopus Count
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