Study designBMJ 2010; 340 doi: http://dx.doi.org/10.1136/bmj.c2667 (Published 26 May 2010) Cite this as: BMJ 2010;340:c2667
- Philip Sedgwick, senior lecturer in medical statistics
- 1Centre for Medical and Healthcare Education, St George’s, University of London, London
Researchers investigated the direct impact of hip fracture on mortality in a cohort of individuals aged over 65 years living in a geographically defined area in western Sydney, Australia.1 At baseline, no one in the cohort had ever experienced a hip fracture. The cohort was followed prospectively over an 18 month study period, during which 211 cases of hip fracture occurred. A total of 201 controls who had not experienced a hip fracture were selected at random from the same cohort. When identified, both cases with hip fracture and controls were subsequently followed for a further year. One year mortality among individuals with hip fracture was 21.7%, compared with 4.7% for controls.
Which one of the following terms best describes the above study design?
a) Case-control study
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