Abstract
If you want to study determinants (exposures) of the transition from healthy to diseased or death, or from diseased to non-diseased, you have to record the sequence of causes, treatments, and end points in time; you need to have longitudinal recordings in most situations. If the exposure is obesity and the outcome is type 2 diabetes, you need at least one recording of obesity in time. Obesity is defined as a body mass index (BMI) of over 30 (a man with a weight of 95 kg and a height of 1.75 m will have a BMI of 95/1.752 = 31.0 and thus be obese).
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Olsen, J., Christensen, K., Murray, J., Ekbom, A. (2010). Follow-Up Studies. In: An Introduction to Epidemiology for Health Professionals. Springer Series on Epidemiology and Public Health, vol 1. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-1497-2_9
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DOI: https://doi.org/10.1007/978-1-4419-1497-2_9
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