Letters of invitation and consent forms for an online health questionnaire were mailed to 5,000 individuals aged 19 years or older, selected at random from the general population of BC; 2,000 had a diagnosis of OA, and 3,000 were selected as non-OA controls. We obtained 332 completed questionnaires from female respondents, 196 OA cases and 136 controls without OA.

These data will allow us to:
1) compare self-reported memory problems in women with and without OA and determine if those with OA have a higher or lower risk of memory problems.
2) determine if the memory problems in women with OA are linked to behavioral factors (poor diet, smoking, alcohol intake, physical inactivity, poor sleep), metabolic factors (high blood pressure, high blood sugar, high cholesterol) and earlier menopause.

Additionally, we will link these previously collected questionnaire data to administrative health data from the BC Ministry of Health. These linked data will provide further information on healthcare utilization, comorbid diagnoses (e.g. hypertension, diabetes, cardiovascular disease), laboratory results (e.g. blood glucose, cholesterol), and all medications dispensed.