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usmlebuzz Forum Elite Topics: 93 Posts: 263	Dec 15, 2003 - 4:53 PM       #1 You have just finished conducting a case-control study to measure the association between alcohol use and lower respiratory tract infections. The most appropriate method to control for smoking as a confounder is a. Matching b. Restriction c. Randomization d. Stratification e. Multivariate modeling
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asmi Forum Hero Topics: 1049 Posts: 4620	Dec 16, 2003 - 10:12 AM       #2 Is it D?
meg Forum Guru Topics: 62 Posts: 806	Dec 16, 2003 - 11:14 AM       #3 could it be a - matching? You can match (group) the participants in the study based on smoking habits and hence control the confound... Am I right?
mjl1717 Forum Junior Topics: 964 Posts: 5442	Dec 16, 2003 - 4:52 PM       #4 a-matching?
IT153 Forum Newbie Topics: 1 Posts: 29	Dec 16, 2003 - 5:16 PM       #5 b - restriction
usmlebuzz Forum Elite Topics: 93 Posts: 263	Dec 19, 2003 - 4:15 PM       #6 Matching is a technique used in the design of the study to control for confounding. Subjects enrolled in a study are matched for age, gender, smoking, or any variable that is not being analyzed. This technique is not used for large cohort studies as it would often be too time-consuming, restrictive, and expensive to find a match for each subject entering the study. Therefore, controlling for confounding is done in the analysis when a large group is recruited. Matching is mainly used when dealing with small case-control studies where the number of subjects enrolled would be too small to yield statistical results if stratified by subgroups. Randomization is used in clinical trials to control confounding (sample size needs to be large—see the answer to question 20). Matching cannot be used in correlation studies or cross-sectional studies: these are descriptive studies to assess disease occurrence and they do not have control groups to test a hypothesis. so D is the answer
fox Forum Guru Topics: 70 Posts: 720	Aug 31, 2006 - 3:03 PM       #7 I dont understand, but based upon your explanation, A seems to be the answer. Sorry for revoking an old post, but can somebody explain ....I didnt get this one....it went over my head.
jsknetsdude Forum Junior Topics: 4 Posts: 63	Sep 17, 2006 - 2:49 AM       #8 Is the Following Corrent .. bassed upon explanation to control Confounding Bian Case-Control - Stratification Clinical trial - Randamization cohort Study - Matching Cross section - Stratification

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