Information about health, medical history, work or retirement activities and social support was collected by telephone interview. Cognitive tests were administered to assess memory and concentration: the Rey Auditory Verbal Learning Test, the Mental Alternation Test and the Animal Fluency test.

Information about health, medical history, work or retirement activities and social support was collected by telephone interview. Additional information on physical, medical and emotional health, as well as the social, lifestyle and economic aspects of participants' lives was also collected. Cognitive tests were performed to assess memory and concentration: the Rey Auditory Verbal Learning Test, the Mental Alternation Test and the Animal Fluency test. Every day memory was assessed with a metamemory questionnaire.

Demographics, details about death (rate of decline, date, cause, and location of death), living arrangements prior to death, trajectory of functional decline one month before death, main caregiver residential transitions and health care utilization 3 months before death, respondent’s perceived quality of dying, and other death-related information is collected.

Information about health, medical history, work or retirement activities and social support was collected by telephone interview. Additional information on physical, medical and emotional health, as well as the social, lifestyle and economic aspects of participants' lives was collected. Cognitive tests were performed to assess memory and concentration: the Rey Auditory Verbal Learning Test, the Mental Alternation Test and the Animal Fluency test.

Information on COVID symptoms and status, risk factors, healthcare use, health behaviors, psychosocial and economic consequences of the pandemic was collected. Anxiety and depression were measured using the Brief Measure for Assessing Generalized Anxiety Disorder (GAD-7) and the Centre for Epidemiologic Studies Short Depression Scale (CES-D-10) respectively are collected weekly, biweekly and monthly.

Information is collected about symptoms, risk factors, health-care use and the psychosocial and economic impacts of COVID-19. Blood samples are collected.

Information about cognition, feelings, and lifestyle is collected in a subset of the population. Repeated cognitive testing and brain scans (MRIs) were performed in a subset of population.

Information is collected on demographics (education, employment, income, gender identity), lifestyle behaviors (physical activity, transportation, nutrition, alcohol and tobacco use), quality of life (Satisfaction With Life scale), functional status (activities of daily living), height, weight, oral health, hearing, vision, subjective cognitive decline, mental health (depression, anxiety), elder abuse, injuries (including falls), pain, diseases, medication, healthcare utilization, home ownership, neighborhood characteristics, and social environment (social network, social support, social participation). Sexual health, family history, and chronic conditions are also assessed through a supplemental questionnaire. Cognitive tests to assess memory and concentration include the Rey Auditory Verbal Learning Test and the Mental Alternation Test.

There are two main ways data is collected in CLSA Comprehensive: first, through an at-home interview and then by having participants visit one of the study's 11 Data Collection Sites. The interviews collected information about physical, medical and emotional health, cognition, as well as the social, lifestyle and economic aspects of participants' lives. Cognitive tests were administered to assess memory using the Rey Auditory Verbal Learning Test, and executive function using the Mental Alternation Test, the Miami Prospective Memory Test, the Stroop Neurological Screening Test - Victoria version (STP), the Controlled Oral Word Association Test (FAS) and the Animal Fluency test. Psychomotor speed was measured with the Choice Reaction Times test (CRT). During visits at Data Collection Sites, participants underwent a range of physical assessments, including height and weight measurements, blood pressure, bone density, vision and hearing tests. Following consent, blood and urine samples were collected.

There are two main ways data is collected in CLSA Comprehensive: first, through an at-home interview and then by having participants visit one of the study's 11 Data Collection Sites. The interviews collected information about physical, medical and emotional health, cognition, as well as the social, lifestyle and economic aspects of participants' lives. Cognitive tests were administered to assess memory using the Rey Auditory Verbal Learning Test, and executive function using the Mental Alternation Test, the Miami Prospective Memory Test, the Stroop Neurological Screening Test - Victoria version (STP), the Controlled Oral Word Association Test (FAS) and the Animal Fluency test. Every day memory was assessed with a metamemory questionnaire and a subjective cognitive decline questionnaire. Psychomotor speed was measured with the Choice Reaction Times test (CRT). During visits at Data Collection Sites, participants underwent a range of physical assessments, including height and weight measurements, blood pressure, bone density, vision and hearing tests. Following consent, blood and urine samples were collected.

Demographics, details surrondings death, living arrangement prior to death, function one month before death, main care giver related information and other death related information is collected.

There are two main ways data is collected in CLSA Comprehensive: first, through an at-home interview and then by having participants visit one of the study's 11 Data Collection Sites. The interviews collected information about physical, medical and emotional health, cognition, as well as the social, lifestyle and economic aspects of participants' lives. Cognitive tests were administered to assess memory using the Rey Auditory Verbal Learning Test, and executive function using the Mental Alternation Test, the Miami Prospective Memory Test, the Stroop Neurological Screening Test - Victoria version (STP), the Controlled Oral Word Association Test (FAS) and the Animal Fluency test. Every day memory was assessed with a metamemory questionnaire and a subjective cognitive decline questionnaire. Psychomotor speed was measured with the Choice Reaction Times test (CRT). During visits at Data Collection Sites, participants underwent a range of physical assessments, including height and weight measurements, blood pressure, bone density, vision and hearing tests. Following consent, blood and urine samples were collected. Note: Due to COVID-19, in-home interviews and visits to CLSA Data Collection Sites were suspended in March 2020.

Information on COVID symptoms and status, risk factors, healthcare use, health behaviors, psychosocial and economic consequences of the pandemic was collected. Anxiety and depression were measured using the Brief Measure for Assessing Generalized Anxiety Disorder (GAD-7) and the Centre for Epidemiologic Studies Short Depression Scale (CES-D-10) respectively are collected weekly, biweekly and monthly.

Blood samples were collected and analyzed for the presence of COVID-19 antibodies and other markers of immunity.

Information about cognition, feelings, and lifestyle is collected in a subset of the population. Repeated cognitive testing and brain scans (MRIs) were performed in a subset of population.

Information on demogaphics (education, income, religion, gender identity, employment, sleep), and lifestyle behaviors (such as alcohol and tobacco use, physical activity, nutrition, transportation), general health, mental health, quality of life (satisfaction with life scale), and subjective cognitive decline) is collected. Social environment (social network, social support, social participation), functional limitations (Activities of Daily Living and Instrumental Activities of Daily Living), falls and injuries, diseases, medication use, health care use information is collected. Sexual health, family history, and chronic conditions are also assessed through a supplemental questionnaire. Cognitive tests include the Prospective Memory Test, Rey Auditory Verbal Learning Test, Digit Triplet Test, Stroop Color and Word Test, Controlled Oral Word Association Test, and the Mental Alternation Test. Hip and waist circumferences, weight and height, heart rate, and blood pressure are measured. Electrocardiogram, spirometry, and carotid intima-media thickness tests are performed. DXA scans are also performed to collect dual hip, lateral spin, forearm, lumbar spine, and body scan measurements. Hearing, vision, and mobility (Timed 4-metre Walk Test, Timed Get Up and Go Test, Standing Balance, Chair Rise Test) tests are also performed. Blood samples are collected.