Associations of self-reported physical activity and depression in 10,000 Irish adults across harmonised datasets: a DEDIPAC-study

Table 1 Information on data harmonisation across datasets

Concept measured	TILDA	Mitchelstown Cohort Study	Harmonisation method
PA	IPAQ – Self-reported weekly minutes of moderate and vigorous PA	IPAQ – Self-reported weekly minutes of moderate and vigorous PA	Weekly minutes of moderate and vigorous PA were summed. Participants were categorised as meeting/not meeting PA guidelines and divided into tertiles of weekly minutes of MVPA within each study and across the integrated dataset
Depression	CES-D (continuous score)	CES-D (continuous score)	Participants with CES-D scores of ≥16 were classified as at-risk for depression
Age	Age reported for 50–79 years (ages < 50 reported as 49; ages > 79 were reported as 80)	Age (5 year categories)	Divided into 10 year categories
Sex	Female and male	Female and male	Females and males grouped
BMI	BMI (categorical) calculated from nurse measured height weight	BMI (continuous) calculated from measured height weight	Split into underweight, normal weight, overweight, and obese using standard cut-offs

BMI Body mass index, CES-D Center for Epidemiological Studies Depression, IPAQ International physical activity questionnaire, PA Physical activity; TILDA The Irish longitudinal study on ageing

ISSN: 1471-2458