… case control study, 17 patients with aggressive periodontitis (… recruiting subjects from
non.hospital settings. Moreover, it is … .participation and adjustment for bias in case.control studies …

… The adjusted RR per site with deepened periodontal pocket was 1.02 (95% CI: 1.00–1.04)
(… whether this loss causes bias. Bias can result if the non-participation is distributed unevenly …

… After adjustment for age, gender, and race/ethnicity the odds ratio for non-participation of …
Smoking and acute myocardial infarction among women and men: A case-control study in …

… This study aimed to determine whether periodontal disease … the SSS case-control status as
the outcome; all models were … Reasons for non-participation were not ascertained. Age was …

… of clinical, sociodemographic and periodontal aspects, and … This pilot case–control
study was approved by the Ethics … To adjust the multivariate model, the variables diabetes, …

… drawn from a hospital-based case-control study– HeNCe Life (… the main reason for non-participation.
Table1 displays the … pilot studies in the target population and minor adjustments …

… Reasons for non-participation are presented in the study flowchart (… could not be used as a
covariate in adjusted analysis. … and severity of COVID-19 infection: a case-control study. J Clin …

… periodontal outcomes, even after adjustment for age, gender, tooth loss, and several
dimensions of socio-economic position (Table 2). The multivariable logistic regression analyses …

… , whereas studies with fewer than 5 stars are regarded to be at a high risk of bias (low-quality
studies… Although the majority of studies reported a satisfying calibration agreement between …

… settings by a multitude of clinicians. While all included … used for assessing risk of bias of
individual studies (including … loss to follow up was addressed Case-control study–If applicable …