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Long-term outcomes and risks factors for failure of intradetrusor onabotulinumtoxin A injections for the treatment of refractory neurogenic detrusor overactivity.
Neurourology and Urodynamics 2018 Februrary
AIMS: Aims of this study were to assess the long-term outcomes of Intradetrusor injection of OnabotulinumtoxinA (Botox® injection) associated with clean intermittent-catheterization (CIC) for the treatment of neurogenic detrusor overactivity (NDO) and to identify risk factors for failure.
METHODS: Neurological patients with NDO using CIC who had received Botox® injections between January 2001 and September 2013 were included. Clinical, urodynamic and radiological data were recorded. Primary endpoint was failure and withdrawal rates after 3, 5, and 7 years of management. Survival curves of withdrawals and failures of treatment were calculated with a 95-confidence interval using the Kaplan-Meier method. Risk factors for failure were determined with univariate analysis and multivariate analysis using Cox model.
RESULTS: Overall, 292 patients, mean age of 40 ± 13, 6 years, were included. Overall, 219 patients (80.6%; IC95% [76.3-85.4%]) were still treated with Botox® injections after 3 years, 128 (71.1%; IC95% [65.7%, 76.9%]) after 5 years, and 58 (60.8%, IC95% [54.0%, 68.4%]) after 7 years. Failure rate was 12.6% (IC95% [8.6-16.5%]) after 3 years, 22.2% (IC95% [16.6-27.3%]) after 5 years, and 28.9% (IC95% [21.9%; 35.3%]) after 7 years of follow-up. Withdrawal rate after 7 years of follow-up was 11.3% (n = 33/292). Severe NDO at baseline appears to be a significant risk factor for failure.
CONCLUSION: This study confirms long-term efficacy and tolerance of Botox® injection in patients with NDO using CIC. Long-term failure and withdrawal rates remain low but significant, and need to be managed.
METHODS: Neurological patients with NDO using CIC who had received Botox® injections between January 2001 and September 2013 were included. Clinical, urodynamic and radiological data were recorded. Primary endpoint was failure and withdrawal rates after 3, 5, and 7 years of management. Survival curves of withdrawals and failures of treatment were calculated with a 95-confidence interval using the Kaplan-Meier method. Risk factors for failure were determined with univariate analysis and multivariate analysis using Cox model.
RESULTS: Overall, 292 patients, mean age of 40 ± 13, 6 years, were included. Overall, 219 patients (80.6%; IC95% [76.3-85.4%]) were still treated with Botox® injections after 3 years, 128 (71.1%; IC95% [65.7%, 76.9%]) after 5 years, and 58 (60.8%, IC95% [54.0%, 68.4%]) after 7 years. Failure rate was 12.6% (IC95% [8.6-16.5%]) after 3 years, 22.2% (IC95% [16.6-27.3%]) after 5 years, and 28.9% (IC95% [21.9%; 35.3%]) after 7 years of follow-up. Withdrawal rate after 7 years of follow-up was 11.3% (n = 33/292). Severe NDO at baseline appears to be a significant risk factor for failure.
CONCLUSION: This study confirms long-term efficacy and tolerance of Botox® injection in patients with NDO using CIC. Long-term failure and withdrawal rates remain low but significant, and need to be managed.
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