cohort studyinstrumental variablemixed modelrepeated dataInstrumental variable methods, which handle unmeasured confounding by targeting the part of the exposure explained by an exogenous variable not subject to confounding, have gained much interest in observational studies. We consider the very f...
One difficulty in performing meta-analyses of observational cohort studies is that the availability of confounders may vary between cohorts, so that some cohorts provide fully adjusted analyses while others only provide partially adjusted analyses. Commonly, analyses of the association between an exposure...
METHODS: In the Port Pirie cohort study, the select... I.S. Tong,L Ying - 《Annals of Epidemiology》 被引量: 2104发表: 2001年 Sensitivity analysis and external adjustment for unmeasured confounders in epidemiologic database studies of therapeutics Background Large health care utilization ...
METHODS: We conducted a population-based prospective cohort study a... D Li,L Liu,R Odouli - 《Human Reproduction》 被引量: 462发表: 2009年 Longitudinal study of the long-term relation between physical activity and obesity in adults BACKGROUND:: Earlier observational studies of the relation ...
with 492 surgery patients and 257 radiation patients; the average follow-up time is 4.96 years. The patient characteristic descriptions of the prostate cancer cohort are shown in Table1and the NSCLC cohort are shown in Table2. Please see “Dataset” for more details on the patient selection pro...
Propensity scores are widely used in cohort studies to improve performance of regression models when considering large numbers of covariates. Another type of summary score, the disease risk score (), which estimates disease probability conditional on nonexposure, has also been suggested. However, littl...
The Stanford Healthcare (SHC) study cohort consists of 99,909 patients who underwent 99,909 echocardiogram studies between 2000 and 2019. The mean age at the time of echocardiogram study was 59.9 ± 17.7 years, 44.3% were women, and 56.5% self-identified as White. Demographic ...
Uncontrolled Confounders May Lead to False or Overvalued Radiomics Signature: A Proof of Concept Using Survival Analysis in a Multicenter Cohort of Kidney ... Purpose We aimed to explore potential confounders of prognostic radiomics signature predicting survival outcomes in clear cell renal cell ...
The finding that MET users more often require RRT has already been reported in other studies. For instance, in a study by Doenyas-Barak et al. [4], 38.6% of the MET-treated population received RRT, as compared to 21.2% of the cohort of patients not treated with MET. Accordingly, we...
Systematically missing confounders in individual participant data meta-analysis of observational cohort studies. Stat Med. 2009;28(8):1218–37.The Fibrinogen Studies Collaboration. 2009. Systematically missing confounders in individual participant data meta-analysis of observational cohort studies. ...