The selection of control groups in case-control studies
Subtitle: evaluation of control groups selected by random digit dialing and from hospitals
By: Sara H. Olson
Published: 1992
Language: eng
Number of pages: 338
Subjects: Random Allocation; Randomized Controlled Trials as Topic; Clinical Trials as Topic; Hospital Records
Other titles: Evaluation of control groups selected by random digit dialing and from hospitals.
Notes: Department: Epidemiology.

Thesis (Ph. D.)--Columbia University, 1992.

Includes bibliographical references (leaves 185-197).