Investigators selected women with breast cancer from the national cancer registry and an age-matched sample of women without breast cancer from the national managed care patient database. Information regarding childbirth was collected from linked vital statistics data. The main research question was whether childbirth after age 35 is a risk factor for breast cancer. What type of study design is it?

Investigators selected women with breast cancer from the national cancer registry and an age-matched sample of women without breast cancer from the national managed care patient database. Information regarding childbirth was collected from linked vital statistics data. The main research question was whether childbirth after age 35 is a risk factor for breast cancer. What type of study design is it?

Nutrition Now

8th Edition

ISBN:9781337415408

Author:Brown

Publisher:Brown

Chapter3: Ways Of Knowing About Nutrition

Section: Chapter Questions

Problem 17RQ

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