The Canadian contingent totalled 1,975, including two nursing sisters. During the fighting from 8 -25 December 1941, about 290 were killed in combat, and some 500 wounded. Around 265 (figures often range between 264 and 267) died in captivity, from malnutrition, disease, abuse, and in some cases executions. The total death toll at the time of liberation was therefore around 555, giving a fatality rate of about 28%. You would therefore have had a roughly 72% chance of surviving to August 1945.
Surviving the fighting and captivity wouldn't have brought an end to your problems, however, since the conditions of your imprisonment might well have left you with lasting medical complications, and could also have shortened your life. In some cases, these were the result of infectious diseases. In other cases, this would be the result of malnutrition, or diseases caused by it. In still other cases, this could include what would nowadays be classed as PTSD or similar conditions, as a result of your experiences in combat or during imprisonment, or both. Significantly, there were also consequences for the long-term survival rates of Hong Kong POWs, who tended to suffer from more medical complications and die earlier than other veterans, even those who had been held prisoner in the European theatre.
The figures for the contingent and its losses can be found in any standard published source relating to the Canadians at Hong Kong, such as C.P. Stacey's Six Years of War (volume 1 of the official history of the Canadian Army in the Second World War, published in 1955). There have been a number of histories of the Canadians at Hong Kong; the most recent is probably Nathan Greenfield's The Damned: The Canadians at the Battle of Hong Kong and the POW Experience, 1941-45. Jonathan Vance's Objects of Concern: Canadian Prisoners of War Through the Twentieth Century would also be worth a look for its discussion of Hong Kong POWs, including the survivors' postwar efforts to obtain compensation for the effects of their improvement.