reported duration versus true follow ...

reported duration versus true follow up duration

Posted in the Epidemiology Forum

Ihab Habil

GÓza, Egypt

#1 Oct 13, 2013
we have been carrying out a study to estimate risk of TB among diabetics. We interviewed about 4000 diabetic patients and asked about duration of diabetes and if have ever been diagnosed of TB.If so, time of infection was also inquired about.
Although there is no true follow up, can we rely on reported duration to calculate person years and hence estimate incidence rate.

if this is epidemiologically acceptable, What would be the correct description of study design?

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