BRHS 40 year follow up physical examination 2018 (Q40)

At this study time point, 667 BRHS cohort participants underwent a physical examination and 1009 completed a postal questionnaire.

Data are available for:

• Questionnaire
• Physical examination measurements
• Blood biomarkers
• Dental data
• Cognition -Test Your Memory (TYM)
• Derived variables
• Participant profile data

Physical examination protocol

The physical protocol document describes the study objectives, design, methods and procedures, assessment types,  organisation of the field study, including specific details on how the research data collection and schedules were conducted during the 40 year follow-up physical examination.

• BRHS 40 year follow-up physical examination protocol

Data documentation and data dictionaries 

Description of the data available, data collection methods and methods for derivation of variables are found in the data documentation files for the different data sets. Data dictionaries include listing all the available variables, BRHS variable names, units/category labels, value ranges, number with data and number with missing data as well as a reference to methods sections described in the data documentation file.