Individual Study / MEC

Multiethnic Cohort Study

Multiethnic Cohort Study

Initiatives -
Start Year
End Year
Funding has continuously been provided for the MEC by the National Cancer Institute (NCI), the federal agency responsible for cancer research in the U.S., and has been renewed until 2022 in recognition for the study’s exceptional contributions.
Supplementary Information;
Visit MEC


Investigators Contacts
  • Dr. Prof. Christopher Haiman
    Keck School of Medicine of USC
  • Dr. Unhee Lim
    University of Hawaiʻi Cancer Center
  • Dr. Prof. David Conti
    Keck School of Medicine of USC
  • Dr. Carol Boushey
    University of Hawaii Cancer Center
  • Dr. Prof. Loic Le Marchand
    University of Hawai‘i at Mānoa


Study design
Population cohort
Follow Up
Participants were followed prospectively for diagnosis of incident invasive breast cancer through routine linkage with Los Angeles County and Hawaii statewide cancer registries, which are a part of the National Cancer Institute’s Surveillance, Epidemiology and End Results Program, and for vital status through linkages to the National Death Index and death certificate files.
Supplementary Information

Marker Paper

Kolonel LN, Henderson BE, Hankin JH, Nomura AM, Wilkens LR, Pike MC, Stram DO, Monroe KR, Earle ME, Nagamine FS. A multiethnic cohort in Hawaii and Los Angeles: baseline characteristics. Am J Epidemiol. 2000 Feb 15;151(4):346-57. doi: 10.1093/oxfordjournals.aje.a010213.

PUBMED 10695593


Sources of Recruitment
  • Individuals

Number of participants

Number of participants
Number of participants with biosamples
Supplementary Information
Residents of Hawaiʻi and Los Angeles:aged 45 to 75 years, from five main ethnic/racial groups(Japanese Americans, Native Hawaiians, African Americans, Latinos)


Availability of data and biosamples


Availability of access information

On the study website :