Page 1 of 1: public health

dinaridi · Credits: 2860 My Scrapbook

A voluntary exercise program was offered to the male employees of a large company. After its introduction, the rates of ischemic heart disease (IHD) events were compared between those who volunteered for the program and those who did not. These events were determined by regular voluntary checkups, including comprehensive cardiovascular investigation. The group that exercised had a lower rate of IHD. The main reason to reject the conclusion that exercise is protective against IHD is
1) selection bias could have occurred.
2) confounding could have occurred related to the size of the company.
3) measurement bias could have occurred.
4) Hawthorne effect could have occurred.
5) results are not generalizable.

met5 · Credits: 3888 My Scrapbook

it's 1

maryana · Credits: 15566 My Scrapbook

1)

bloater · Credits: 1258 My Scrapbook

1)--- selection bias

sairababy · Credits: 2578 My Scrapbook

Selection bias

doc604 · Credits: 435 My Scrapbook

It is definitely 1

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