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@ All forum members , Biostatistic help needed . - bugguy19
thanks for collecting them.
what's the difference between non response bias and attrition bias ?
please explain with an example.
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@mdkhayat , am not sure I think -Non response bias occur in cohort study where exposure is not determined yet

Attrition bias ,is more related to case control ------------ loss of subject in prospective study especially if loss to follow up occur disproportionally between exposed and unexposed group


lets wait for more opinions

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nice post ...
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@ mony26175, thank you Smile

@ cardio, please come back your ATP needed.

@ all forum please comment on the bias post, add , change or discuss .
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