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Clinical Trial
. 2015 Feb;136(2):323-7.
doi: 10.1016/j.ygyno.2014.12.021. Epub 2014 Dec 18.

Neurotoxicity in ovarian cancer patients on Gynecologic Oncology Group (GOG) protocol 218: characteristics associated with toxicity and the effect of substitution with docetaxel: an NRG Oncology/Gynecologic Oncology Group study

Affiliations
Clinical Trial

Neurotoxicity in ovarian cancer patients on Gynecologic Oncology Group (GOG) protocol 218: characteristics associated with toxicity and the effect of substitution with docetaxel: an NRG Oncology/Gynecologic Oncology Group study

Dana M Chase et al. Gynecol Oncol. 2015 Feb.

Abstract

Objectives: To describe characteristics associated with neurotoxicity (NT) in advanced ovarian cancer patients treated on Gynecologic Oncology Group 218 and examine effect of substituting docetaxel for paclitaxel in these patients.

Methods: The development of NT was defined as Common Toxicity Criteria grade (G)≥1. The association between substitution with docetaxel and NT improvement was explored with generalized estimating equations adjusting for treatment cycle and NT grading at previous cycle.

Results: Of 1864 evaluable patients, 1329 (71%) developed G≥1 NT during the study. Nearly half appeared within the first two cycles of chemotherapy, with 31% experiencing G≥2. Older patients or those with worse quality of life (QoL) scores at baseline (p<0.05) were more likely to experience NT. One-hundred-six patients received docetaxel as substitute for paclitaxel. Of them, 47 patients started with docetaxel at cycle one due to reaction to paclitaxel (n=32), fear of NT (n=4), and other reasons (n=11), whereas 59 patients switched to docetaxel during cycle 2-6 due to NT (n=32), reaction to paclitaxel (n=19), and other reasons (n=8). Although the protocol instructed otherwise, the majority continued paclitaxel despite G≥2 NT symptoms. There was no evidence that substitution with docetaxel improved NT (Odds Ratio: 1.57; 95% CI 0.98-2.54; p>0.05). Of 59 patients who switched to docetaxel, only seven (12%) discontinued taxane prior to chemotherapy completion. A roughly equal chance of worsening NT was reported on paclitaxel (6%) as on docetaxel (5%).

Conclusions: Age and worse QoL at baseline are associated with NT. Substitution of docetaxel did not improve NT symptoms.

Keywords: Neurotoxicity; Ovarian cancer; Taxane.

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Figures

Figure 1
Figure 1. Substitutions for Paclitaxel
Progression of Mean NT Grade from Onset to Worst by patient or disease characteristics.
Figure 2
Figure 2
Peripheral neuropathy grade at the time of switching to docetaxel

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