Question

  type of Information Bias?

Lead time bias

Incidence-prevalence bias

loss to followup bias

publication bias

Answer 1

Information bias includes chronological bias, co-intervetion bias, contamination bias, diagnostic access bias, detection bias, expectation bias, exposure bias, intervention bias, incorporation bias, lead time bias, measurement bias, observer bias, neyman (incidence prevalence bias), non respondent bias, publication bias, proficiency bias, recall bias, referral bias, response bias, reporting bias, selection bias, sampling bias, spectrum bias, unmasking bias, timing bias, verification bias and volunteer bias.

Lead time is the duration between early detection of disease and the time of its usual clinical presentation. It is an apparent increase in survival due to diagnosing a life threatening disease condition at an early stage.

Incidence-prevalence bias is a selection bias where exclusion of very sick or healthy subjects from study and leads to skewed results. This bias impact on severity of the conditions in case control and cross sectional studies.