By working through this community network, referral bias
(influence of disparate data source) will be avoided since the patient population will be typical of the representative cancer patient in the community, as opposed to patients in tertiary cancer centers.
10) Furthermore, one rural academic center has pointed to referral bias
on the part of transferring physicians at outlying hospitals in explaining a disproportionately high referral rate of patients with intra-cerebral hemorrhage.
Although limited by the use of single night polysomnography, a small study population, and possibly by referral bias
to a tertiary center, the findings suggest that periodic limb movements of sleep might be an important side effect of SSRIs that is frequently overlooked in children.
Because of Denmark's universal health care plan, this study also had no referral bias
or diagnostic bias.
These differences would be unlikely to introduce any referral bias
in our study because we adjusted for these factors.
These studies have been widely criticized for having insufficiently considered risk adjustment and possible referral bias
In summary, given the disparity in results published so far, more clinical research as provided by Chou and colleagues (7) is needed to better characterize the relationships between SDB and dyslipidaemia, particularly from epidemiologic cohorts enrolling community dwelling individuals that would have limited referral bias
Some conditions will be overrepresented because of referral bias
and because certain tests (e.
In addition to minimizing bias, population-based data resources provide the unique opportunity as to how referral bias
is able to distort research findings by comparing findings based on the local population with the same findings in the referral populations.
MRI referral bias
might also play a role in the increased mastectomy rates, she noted.
Consequently, it seems tenuous to attribute a predisposition for ADHD as accounting for the disproportionate representation of males in special education as this confounds the putative biological predisposition for increased activity levels and aggression with problems of learned behavior and referral bias
The Texas investigators conceded that because theirs was a retrospective study of a registry population, referral bias
is an issue, and prospective cohort studies will be needed to accurately determine the scope of problems caused by childhood-onset morphea in adults.