Adrian Loerbroks

3 Questions 14 Answers 0 Followers

Questions related from Adrian Loerbroks

How to carry out participant observation / ethnographic research?

Dear all, Can anyone recommend basic / classical books or papers that provide an introduction on how to carry out participant observation in health research (e.g. in care institutions)? Thanks a...

09 September 2017 4,802 39 View

How many cases or what sample size is required for multivariate analyses?

Currently, I am analyzing data from a small study of 1500 participants. There are only 63 disease cases (asthma). The exposure is a continous score (questionnaire data). I ran seperate regression...

06 June 2014 2,865 11 View

How is the odds ratio affected by high prevalences of both outcome and exposure?

The rare disease assumption states that odds ratio (OR) only approaches relative risk when the disease (=outcome) is rare, i.e., < 10%. There are papers that show that outcomes with higher...

11 November 2013 626 6 View