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Purpose: The causal link between chemotherapy and cognitive impairment is unclear. We studied testicular cancer patients' objective and subjective cognitive function longitudinally, comparing a surgery group with a surgery + chemotherapy group, addressing prior methodological issues using a computerized test to limit assessment issues, and controlling for confounding variables.Methods: Prospectively, of 145 patients from 16 centres with sufficient data, n = 61 receiving surgery + chemotherapy (etoposide and cisplatin ± bleomycin, BEP/EP; or single agent carboplatin) were compared to n = 41 receiving surgery alone. CogHealth assessed six objective cognitive tasks. The Cognitive Failures Questionnaire assessed self-perceived cognitive dysfunction. The Functional Assessment of Chronic Illness Therapy-Fatigue and the Hospital Anxiety and Depression Scale assessed psychological influences. Linear mixed models compared changes from baseline (< 6 months post-surgery/pre-chemotherapy) to follow-up (12-18 months post-baseline), controlling covariates.Results: There were no significant interaction effects for five objective cognitive function tasks suggesting that changes over time were not due to group membership. However, psychomotor function (controlling for age) and physical well-being were significantly worse for the chemotherapy versus the surgery group at baseline, with groups converging by follow-up. Groups showed no differences in subjective cognitive dysfunction. The chemotherapy group showed higher anxiety, poorer functional well-being and worse fatigue compared to the surgery-only group at baseline, but not by follow-up. For both groups, emotional well-being, functional well-being and anxiety significantly improved over time.Conclusion: No substantive differences in objective or subjective cognitive dysfunction in either group persisted 12-18 months post-baseline. Patients undergoing chemotherapy for testicular cancer differ from findings in breast cancer populations.Trial Registration: ClinicalTrials.gov Identifier: ACTRN12609000545268. [ABSTRACT FROM AUTHOR]

Background The Australian and New Zealand Germ Cell Trials Group conducted a multicenter randomized phase III trial in men with good-prognosis germ cell tumors of two standard chemotherapy regimens that contained bleomycin, etoposide, and cisplatin but differed in the scheduling and total dose of cisplatin, the total dose of bleomycin, and the scheduling and dose intensity of etoposide. The trial was stopped early at a median follow-up of 33 months after a planned interim analysis found a survival benefit for the more dose-intense regimen. The aim of this analysis was to determine if this survival benefit was maintained with long-term follow-up. Methods Between February 1994 and April 2000, 166 men with good-prognosis metastatic germ cell tumors defined by modified Memorial Sloan-Kettering criteria were randomly assigned to receive 3B90E500MP (three cycles, repeated every 21 days, of 30 kU bleomycin on days 1, 8, and 15; 100 mg/m² etoposide on days 1-5; and 20 mg/m² cisplatin on days 1-5; n = 83) or 4B30E360P (four cycles, repeated every 21 days, of 30 kU bleomycin on day 1, 120 mg/m² etoposide on days 1-3, and 100 mg/m² cisplatin on day 1; n = 83). Endpoints included overall survival, progression-free survival, and quality of life and side effects, which were assessed using the Spitzer Quality of Life Index and the GLQ-8, respectively, before random assignment and during and after treatment. All analyses were by intention to treat. All P values are two-sided. Results The median follow-up was 8.5 years. All but five survivors (3%) were followed up for at least 5 years. Overall survival remained better in those assigned to 3B90E500P than in those assigned to 4B30E360P (8-year survival: 92% vs 83%; hazard ratio of death = 0.38, 95% confidence interval = 0.15 to 0.97, P = .037). Progression-free survival favored 3B90E500P but was not statistically significantly different between the treatment groups (8-year progressionfree survival, 3B90E500P vs 4B30E360P: 86% vs 79%; hazard ratio of progression = 0.6, 95% confidence interval = 0.3 to 1.1, P = .15). At the end of treatment, average scores for most side effect scales favored 3B90E500P. After the completion of treatment, average GLQ-8 scores for numbness (P = .003) and hair loss (P = .04) and the Spitzer Quality of Life Index (P = .05) favored 3B90E500P. Conclusion The survival benefit of 3B90E500P over 4B30E360P was maintained with long-term follow-up. [ABSTRACT FROM AUTHOR]