Midlife in the United States

Midlife in the United States (MIDUS) is a national longitudinal study of health and well-being. It was conceived by a multidisciplinary team of scholars interested in understanding aging as an integrated bio-psycho-social process. Since its inception in 1995 MIDUS has continued to grow, such that it now includes data from over 10,000 individuals, comprising thousands of variables in different scientific areas among distinct cohorts.

This website is a one-stop repository that provides MIDUS data and metadata (information about data) for exploration and analysis. Users can read project abstracts, search for variables within or across datasets, download instruments, documentation, and codebooks, and download datasets from the official MIDUS archive.

The MIDUS study and this repository are supported by multiple grants from the National Institute on Aging (5R37AG027343, 5P01AG020166, 1R03AG046312) and by the University of Wisconsin Institute on Aging. This repository is based on the Data Documentation Initiative (DDI) metadata standard and is powered by Colectica software. Please feel free to explore the repository and send any feedback or questions to bradler@wisc.edu.

MIDUS 1

Project 1 In 1994/95, the MacArthur Midlife Research Network carried out a national survey of over 7,000 Americans aged 25 to 74. Study Details Browse Data Download Data Download Codebook
Project 2 The purpose of the National Study of Daily Experiences is to examine the day-to-day lives, particularly the daily stressful experiences, of a subsample of MIDUS respondents. Study Details Browse Data Download Data Download Codebook

MIDUS 2

Project 1 Project 1 provided follow-up on the psychosocial, sociodemographic, and health variables assessed in MIDUS I. Study Details Browse Data Download Data Download Codebook
Project 2 Project 2 provided follow-up on the daily diary study included in MIDUS I. Study Details Browse Data Download Data Download Codebook
Project 3 Project 3 included new cognitive assessments for the full MIDUS sample, plus longitudinal follow-up for the cognitive subsample from MIDUS I. Study Details Browse Data Download Data Download Codebook
Project 4 Project 4 included comprehensive biomarker assessments on a subsample of MIDUS respondents, collected at one of 3 General Clinical Research Centers around the country. Study Details Browse Data Download Data Download Codebook
Project 5 Project 5 included neuroscience assessments on a subsample of respondents in the biomarker study. Study Details Browse Data Download Data Download Codebook
Milwaukee Sample (merged with M2P1) As a refinement to MIDUS II, a sample of African Americans from Milwaukee was included to examine health issues in minority populations. Study Details Browse Data Download Data Download Codebook
Milwaukee Sample (Standalone) This dataset contains only data from Milwaukee sample. Study Details Browse Data Download Data Download Codebook

MIDUS Refresher

Project 1 In 2011 MIDUS began data collection on a new national sample of American adults to "refresh" the original MIDUS cohort and to examine the health impacts of the economic recession. Study Details Browse Data Coming soon Coming soon

MIDUS Japan

MIDJA Survey The MIDJA study is a probability sample of Japanese adults (N = 1,027) aged 30 to 79 from the Tokyo metropolitan area that includes many of the measures from the MIDUS Survey and Biomarker projects. Study Details Browse Data
Download Data Download Codebook
MIDJA Biomarkers The MIDJA Biomarker study includes biomarker assessments, drawn from the MIDUS Biomarker study, for a sub-sample of the MIDJA respondents. Study Details Browse Data
Coming soon Download Codebook