用Quizlet學習並牢記包含Is case control prospective or retrospective?、What intervention does the investigator change in case-control?、What can you estimate from case-control studies?等詞語及更多內容的單詞卡。
A case-control study was carried out to investigate the possible relationships between IDDM and various biological, chemical, and psychological factors. All 161 cases of IDDM among children aged 0-17 yr occurring in Montreal from 1983 to 1986 were included. The parent of each newly diagnosed ...
We propose a method for estimating odds ratios from case-control data in which covariates are subject to measurement error. The measurement error may contain both a random component and a systematic difference between cases and controls (recall bias). A multivariate normal discriminant analysis model...
A case-control study was performed to elucidate the strength of the relation between musculoskeletal disorders in the neck and shoulders and physical, organisational, and psychosocial aspects of the work environment. Cases were identified as those persons who consulted a physician in a community in so...
The case-cohort design combines the advantages of a prospective cohort study and the efficiency of a case–control design. Usually a Cox proportional-hazards model is used for the analyses. However, adaptation of the model is necessary because of the sampling. We compared three methods that were...
Case control studies define relative risk (ratio of incidence among users vs. nonusers) whereas cohorts define attributable risk (the difference in incidence... BV Stadel - 《New England Journal of Medicine》 被引量: 655发表: 1981年 Nested Case-Control Studies The nested case-control study desi...
医学统计学课件：CASE-CONTROL STUDIES CASE-CONTROLSTUDIES 这是神马研究？Cross-sectionalstudy Criticaldesignissue:Directionality Directionalitydefineswhenexposurevariableisobservedrelativeintimetowhenthehealthoutcomeisobserved Time BackwarddirectionalstudyDisease Comparespreviousexposuresinpersonswithandwithoutthedisease Expos...
Characteristics of the study cohort are presented in Table 1. There was male dominance (58%) and the mean age was 67 years. More than half of the sepsis patients had a CCI of ≥ 2 compared to 18% in the control group. The most common comorbidities among the sepsis patients were ...
In the case-crossover design, only cases are sampled and the hazard ratio is estimated from within-subject comparisons of exposures at the event time and in M control periods prior to the event. We consider the effect of within-subject dependence of exposures in successive time periods. We sh...
survival difference between the cohort and a control group at a 5-year follow-up.14In our experience with these two cases, LMCA stenting can serve as a treatment bridge while patients are optimized for corrective surgical ...