With retrospective data collection it was not possible to collect information regarding the diagnosis and management of "self-reported" asthma.
Retrospective data collection using electronic hospital dis3charge summaries represents a reliable, and valid method for collecting FCI comorbidity information.
Design: Retrospective data collection using telephonic survey.
Furthermore, the accuracy of these retrospective data collection in these databases has been called into question.
But that could just as easily be achieved via a power to check the current weblogs of a known suspect – it doesn't require massive retrospective data collection on millions of innocent citizens.
The variable, retrospective data collection, the excruciatingly small number of cases, and a situation where parents were desperate to find a cause for a child's illness, make recall bias highly likely.
Case notes were used for retrospective data collection.
The study relied on the retrospective data collection with subsequent absence of some data.
Institutional review board approval (LEC 09-15-110) was obtained for retrospective data collection and analysis.
On the opposite, a high risk of bias was attributed to retrospective data collection from manual records or administrative databases.
The presence of selection bias, retrospective data collection, lack of control groups and inadequate functional assessment tools provide only poor-quality evidence for fibular nailing.
