Dietary Manager Author: Legvold and Salisbury Title: Foodservice Management –

We calculated the prevalence estimate of the diagnosis of osteoarthritis in the 2-year contact group by age and sex. In addition, we made direct age-sex-standardized prevalence estimates according to the Canadian national age-sex dis tribution based on data from the 2011 census. We then cal culated prevalence ratios of 3 risk factors: patient’s rurality (determined by the middle digit of the first 3digits of the patient’s postal code; if the digit is a “0,” it is considered by Canada Post to be a rural delivery route), body mass index (BMI) (under weight, < 18; normal, 18-24; overweight, 25-29; obese, ≥30) and smoking (never smoked, past smoker, current smoker). We performed 3 separate log-binomial regression analyses to calculate prevalence ratios, each controlling for age and sex of the study population.21 In addition to preva-lence ratios, we report the corresponding 95% CIs and pvalues.We analyzed the presence of comorbid conditions, adjust-ing for age and sex, using the same log-binomial approach and expressed the results in terms of prevalence ratios, 95% CIs and p values. In addition, we looked at the cumulative propor-tion of patients with a diagnosis of one or more of the other chronic diseases reported in CPCSSN among those with a diagnosis of osteoarthritis.We assessed medication data by analyzing the pattern of

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