The three target populations of the NPHS are household residents in all Canadian provinces1, residents foreseen to remain longer than six months in health care institutions, and the residents of Yukon and the Northwest Territories2. [...] This is the difference between the probability of a future health event for individuals in one SAH category and the probability of the same health event for individuals in another SAH category, measured in percentage points. [...] The second is the odds-ratio minus unity: unity subtracted from the ratio between the probability of a future health event for individuals in one SAH category and the probability of the same health event for individuals in another SAH category. [...] Roughly, this measures the difference in risk across the two groups as a percentage of the risk of the base group. [...] In each of Tables 6, 7, 8 and 9, results for the 20-34 age group are in the second column; results for the 35-49 age group are in the third column; and results for the 50-64 age group are in the fourth and final column.