… The strategy used in this study for the adjustment of selection bias in case–control studies
was useful, as some bias reduction could be achieved by at least one of the propensity-…

… periodontitis is associated with the diagnosis of cognitive impairment/dementia after adjustment
for … The main reason for non-participation was a lack of time. The mean age of cases and …

… unrelated factors, which have similar bias structures as the main … least one visit) or non-participation.
We included visits involving … We repeated the unadjusted and the two adjusted Cox-…

… Strategies used for adjustment of non-participation bias have … they may result in some degree
of bias reduction [López et al., … nonparticipation bias in a case-control study of periodontitis. …

… a case-control study. We demonstrate this method by reanalysing a Yorkshire childhood …
case-control study and an Indian study of stroke. We explain how potential participation bias …

… Case-control studies reverse their sequence of measurements, with the investigator …
For the purpose of this study, any article in which the word bias was not used was given …

… only three papers were identified as cohort studies and none was a case-control study. …
*Give information separately for cases and controls in case-control studies and, if applicable, for …

… Half-yearly calibration exercises were performed on subjects … of case-control and longitudinal
treatment studies CRP levels … Second, selection bias due to non-participation in FMD …

… with periodontitis after adjusting for age and sex. Previous … Hiraki et al., in a case control
study, used tooth loss as an … The common reasons for non-participation among the elderly were …

… periodontal treatment in a subject with severe periodontitis [Citation27] have also been reported.
However, none of these studies relate to chronic, destructive periodontal … of periodontal …