Prospective Data on Bariatric Surgery Effect on IPSS and LUTS

To establish a central database on clinical parameters for patients who has morbid obesity, which aiming at 1. to compare the results of those with or without receiving invasive bariatric treatment in Prince of Wales Hospital ( Multidiciplinary Clinic of Metabolic \& Bariatric Surgery) and CUHK Medical Centre (Weight Management \& Metabolic Surgery Clinic). 2. To audit and compare outcome between PWH, CUHK Medical Centre, and with other bariatric surgery centers in Hong Kong (Hong Kong Bariatric \& Metabolic Surgery Registry) 3. To compare outcome with the regional/international center databse for benchmarking performance of HK bariatric surgery