| Abstrakt: |
Simple Summary: Treatment of non-muscle invasive bladder cancer (NMIBC) consists mainly of repeated transurethral bladder surgery (TURBs) and instillation treatments. This treatment might influence bladder function and, therefore, the patient's quality of life. We used bladder-related medication as a surrogate marker of compromised bladder function to investigate whether the load of repeated surgery and the exposure to adjuvant instillation influence bladder function. The study was conducted as a register-based study in a non-selected national cohort of NMIBC patients. We included 17,774 patients. Patients exposed to ≥5 TURBs had a higher risk of using bladder-relaxing medication than patients exposed to 1 TURB and a higher risk of cystitis. BCG-exposed patients had a higher risk of bladder-relaxing medication use compared to non-exposed and had a higher risk of cystitis. Repeated TURBs have the highest impact on bladder function. To maintain the best possible bladder function, the goal of NMIBC treatment should be as few TURBs as feasible. Repeated transurethral bladder resections (TURBs) and instillation treatments in non-muscle invasive bladder cancer (NMIBC) might influence bladder function and, therefore, quality of life. Bladder-related medication is a surrogate marker of compromised bladder function. The objective was to investigate whether TURBs and adjuvant instillation therapy are associated with the use of anticholinergics, β3-agonists, and cystitis-relevant antibiotics. We divided all Danish patients diagnosed with primary NMIBC during 2002–2017 registered in the Danish National Patient Registry (DNPR) based on TURB-load within the first five years from diagnosis (1 TURB, 2–4 TURBs, ≥5 TURBs). Instillation therapy with either mitomycin C (MMC) or bacillus Calmette-Guerin vaccine (BCG) was independent exposure (yes or no). We included 17,774 patients; 76% men, median age: 70 years (IQR: 63, 77). Patients exposed to ≥5 TURBs had a higher risk of using bladder-relaxing medication than patients exposed to 1 TURB, HR = 4.01 [3.33; 4.83], and higher risk of cystitis, HR = 2.27 [2.05; 2.51]. BCG-exposed patients had a higher risk of bladder-relaxing medication use compared to non-exposed, HR = 1.92 [1.69; 2.18], and a higher risk of cystitis, HR = 1.39 [1.31; 1.48]. Repeated TURBs have the highest impact on bladder function. Adjuvant instillation therapy is also associated with the use of bladder-related medication. [ABSTRACT FROM AUTHOR] |
