KWONG WAH Hospital admitted yesterday that it had been unaware that the body of a patient who had committed suicide was lying on a hospital podium overnight. A hospital spokesman said staff knew brain-disease patient Chan Kwok-wing, 53, had been missing for more than 11 hours, but were unable to find him. Police believe Chan committed suicide by jumping from the rooftop of the Yau Ma Tei hospital's East Ward at about 9 pm on Friday. But his body lay there until a nearby resident raised the alarm at 8.15 am yesterday. Police said a woman who lives across the street witnessed Chan's fall and heard a loud bang on Friday night, but did not report it. She woke up yesterday, realised the man was still lying on the hospital podium and called police, officers said. Kwong Wah was alerted at about 8.50 am. A hospital ward manager confirmed Chan had been a long-term patient of the hospital and had previously undergone a brain operation. He was under observation after being admitted in a daze on August 13. He was placed in a brain surgery ward, where one registered nurse and two student nurses took care of up to 40 patients. The hospital refused to explain how he had gained access to the roof yesterday. In April, after an incident at Queen Elizabeth Hospital in which a patient lived on the roof for three days, Kwong Wah chief of service Dr Yip Wai-chun said the roof was kept locked, with a key nearby in a case of fire. Legislator Michael Ho Mun-ka called for a review for all hospitals in order to prevent further tragedies. Nurse shortages posed a major threat to the quality of hospital care, he said. 'If the nurses could detect the suicidal tendencies of the patients in question earlier, the hospital might be able to prevent it from happening,' Mr Ho said. 'I demand the Hospital Authority review the operational procedure.' A Hospital Authority spokesman said it would launch a full investigation into the incident after the holiday weekend. Kwong Wah Hospital was founded by the Tung Wah Group of Hospitals in 1911 and has been managed by the authority since 1991. In 1993, the family of Tsang Kwong-chak, who committed suicide by jumping from his hospital window, was awarded an unprecedented $2 million from the United Christian Hospital for negligence. Kwong Wah has 1,173 beds and more than 2,500 staff. It operates a 24-hour accident and emergency service.