title: Increased risk of pneumonia in patients receiving gonadotropin-releasing hormone agonists for prostate cancer.
abstract: BACKGROUND
  This study aimed to investigate the relationship between the use of gonadotropin-releasing hormone (GnRH) agonists and subsequent risk of pneumonia in patients with prostate cancer (PC) using a population-based dataset.
  
  
  METHODS
  We obtained the data from Taiwan's Longitudinal Health Insurance Database 2000. We included 2064 PC in this study. Of the sampled PC patients, 1207 received treatment with GnRH agonists. We individually traced each PC patient for a 1-year period to identify those who were hospitalized with pneumonia. We performed a Cox proportional hazard regression to explore the association between the use of GnRH agonists and the risk of pneumonia during the 1-year follow-up period.
  
  
  RESULTS
  Incidence rates of pneumonia during the 1-year follow-up period were 4.35 (95% confidence interval (CI): 1.89∼9.64) per 100 person-years and 2.14 (95% CI: 1.31∼3.32) per 100 person-years for PC patients who did and those who did not receive treatment with GnRH agonists, respectively. The log-rank test suggested that there was a significant difference in the 1-year pneumonia-free survival rate between PC patients who did and those who did not receive treatment with GnRH agonists (p<0.002). After adjusting for age, monthly income, and the Charlson Comorbidities Index score, PC patients who received treatment with GnRH agonists were more likely to have been hospitalized for pneumonia during the 1-year follow-up period than PC patients who did not receive treatment with GnRH agonists (hazard ratio: 1.92, 95% CI: 1.10∼3.36).
  
  
  CONCLUSIONS
  PC patients who received treatment with GnRH agonists had an increased risk of pneumonia.
authors: Division of Urology, Department of Surgery, Far Eastern Memorial Hospital, Banciao, New Taipei City, Taiwan; School of Medicine, Fu-Jen Catholic University, New Taipei City, Taiwan; Sleep Research Center, Taipei Medical University Hospital, Taipei, Taiwan.
authors: Shiu-Dong
authors: SD
authors: Chung
authors: Department of Urology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan.
authors: Shih-Ping
authors: SP
authors: Liu
authors: Sleep Research Center, Taipei Medical University Hospital, Taipei, Taiwan; School of Health Care Administration, Taipei Medical University, Taipei, Taiwan.
authors: Herng-Ching
authors: HC
authors: Lin
authors: School of Pharmacy, Taipei Medical University, Taipei, Taiwan; Department of Pharmacy, Taipei Medical University Hospital, Taipei, Taiwan.
authors: Li-Hsuan
authors: LH
authors: Wang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000970:Antineoplastic Agents / Q000009:adverse effects*; D007987:Gonadotropin-Releasing Hormone / Q000009:adverse effects* / Q000819:agonists; D006801:Humans; D008297:Male; D011014:Pneumonia / Q000209:etiology*; D011471:Prostatic Neoplasms / Q000188:drug therapy*; D012307:Risk Factors
chemical_list: D000970:Antineoplastic Agents; D007987:Gonadotropin-Releasing Hormone