SAMPLE SIZE DETERMINATION IN HEALTH STUD

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SAMPLE SIZE DETERMINATION IN HEALTH STUD

SAMPLE SIZE DETERMINATION IN HEALTH STUDIESA Practical Manuals. K. LwangaEpidemiological and Statistical Methodology World Health Organization Geneva,

SAMPLE SIZE DETERMINATION IN HEALTH STUD , Switzerlandands. LemeshowDivision of Public Health University of Massachusetts at Amherst MA. USAWorld Health Organization Geneva 1991WHO Library Ca

taloguing in Publication Datal.wanga. s KSample size determination in health studies a practical manualISampling studies 2 Health surveys I Lemeshcw. SAMPLE SIZE DETERMINATION IN HEALTH STUD

sIITitleISBN 92 4 154405 8 (NLM Classification: WA 950)•© World Health Organization 1991Publications of the World Health Organization enjoy copyright

SAMPLE SIZE DETERMINATION IN HEALTH STUD

protection in accordance with the provisions of Protocol 7 of the Universal Copyright Convention. For rights of reproduction or translation of WHO pub

SAMPLE SIZE DETERMINATION IN HEALTH STUDIESA Practical Manuals. K. LwangaEpidemiological and Statistical Methodology World Health Organization Geneva,

SAMPLE SIZE DETERMINATION IN HEALTH STUD th Organization welcomes such applicationsThe designations employed and the presentation of the material in this publication du not imply the expressi

on of any opmion whatsoever Iin the pan of the Secretariat of text World Health Organization concerning the legal status of any country, territory, ci SAMPLE SIZE DETERMINATION IN HEALTH STUD

ty or area or of Its authorities c* concerning the delimitation of its frontiers nr boundaries.The mention of specific companies or of certain manufac

SAMPLE SIZE DETERMINATION IN HEALTH STUD

turers' products does not irnpry that they are endorsed or recommended by the World Health Organization in preference to Offers pl a similar nature th

SAMPLE SIZE DETERMINATION IN HEALTH STUDIESA Practical Manuals. K. LwangaEpidemiological and Statistical Methodology World Health Organization Geneva,

SAMPLE SIZE DETERMINATION IN HEALTH STUD are responsible for the views expressed in this publication.TvpeMi <■ mail P’lnwo n tna'inc 89teO87-Mw.nl rrvClw*-5ơ»ContentsPrefaceVIntroductionviiOn

e-sample situations1Estimating a population proportion with specified absolute precision1Estimating a population proportion with specified relative pr SAMPLE SIZE DETERMINATION IN HEALTH STUD

ecision2Hypothesis tests for a population proportion3Two-sample situations6Estimating the difference between two population proportions with specified

SAMPLE SIZE DETERMINATION IN HEALTH STUD

absolute precision6Hypothesis tests for two population proportions7Case control studies9Estimating an odds ratio with specified relative precision9Hy

SAMPLE SIZE DETERMINATION IN HEALTH STUDIESA Practical Manuals. K. LwangaEpidemiological and Statistical Methodology World Health Organization Geneva,