Figure 3.

Example harmonization sheet

Examples of lines from the harmonization sheet for height (A) and education (B and C) across multiple cohorts are presented here. Height was a continuous variable and was harmonized to centimeters as the final unit for all cohorts. When necessary, a "code_type" of “function” was used to convert measurements in inches to centimeters as illustrated in (A) for FHS – Cohort. (B) and (C) illustrate harmonization of the education variable. Since this is a categorical variable for many studies, a “code_type” of “recode category” was used to map original source variables to harmonized variables for the DRPP. More complex variable transformations using multiple source variables as input were combined using a “function,” as illustrated in (C) for the SALSA.