CHS Data Documentation

Updated: 1/1/26

CHS Data Collection Information

• CHS Data Collection Dates and Overview
• Summary & Frequency of Clinic Visit Data
• Study Component Schedules
• Baseline Data Summary
• Baseline Monograph

CHS Data Collection Forms

• Data Collection Forms (Year 2-11)
• Data Collection Forms (Year 18 & All Stars Study)
• Data Collection Forms (Year 16-35 Phone)
• Data Collection Forms (Year 31 Annual (In-person SuperAgers visit and Phone))

CHS Data Dictionaries

• Longitudinal Data Dictionary (LDD): The LDD is an extensive set of tables, one for each Record Type in CHS.  Each table contains all questions asked (at any year) on that record and lists the variable names corresponding to the question for each year the question was asked. The LDD is a Word document and can be downloaded directly or as a zipped file.

              Word (.doc) (version February 2017)     Adobe (.pdf) (version February 2017)

• All Stars Year 18 Data Dictionary 

CHS Manual of Operations

• Clinic Visit MOPs
• Surveillance Manual of Operations (November, 2007) 
• Streamlined Mortality Review Manual of Operations (2016-2019)

Additional Data Documentation

• Biochemical Measurements (November 4, 2021)

• CMS (Medicare) Data

• Events Data

As of 9/2017:  *New Events Dataset available (follow-up through June 30th, 2015)*

Events Data Collection Overview  

Events Data Collection Forms

• Genetic and Omics Data

Related Links:

• Main Data & Specimen page