منابع مشابه
Loss to follow-up in cohort studies: bias in estimates of socioeconomic inequalities.
BACKGROUND Although cohort members tend to be healthy and affluent compared with the whole population, some studies indicate this does not bias certain exposure-outcome associations. It is less clear whether this holds when socioeconomic position (SEP) is the exposure of interest. METHODS As an illustrative example, we use data from the Avon Longitudinal Study of Parents and Children. We calc...
متن کاملLoss to follow-up
Why do these situations make a difference? Because in each situation, those lost to follow-up often have a different prognosis than those who complete the study. For example, patients who receive treatment for cervical myelopathy may not return for follow-up because they became asymptomatic and felt no need to return to see the surgeon. Conversely, some patients may not return because they had ...
متن کاملLoss to follow-up matters.
Survival analysis of joint replacement relies on the assumption that surgical procedures in patients lost to follow-up have the same chance of failing as those in patients who continue to be assessed. Our study questions that assumption. During the 16-year follow-up of 2268 patients who had received total hip replacements 142 (6%) were lost to follow-up. The cumulative loss at 15 years was 20%....
متن کاملQuantifying and Adjusting for Disease Misclassification Due to Loss to Follow-Up in Historical Cohort Mortality Studies
The purpose of this analysis was to quantify and adjust for disease misclassification from loss to follow-up in a historical cohort mortality study of workers where exposure was categorized as a multi-level variable. Disease classification parameters were defined using 2008 mortality data for the New Zealand population and the proportions of known deaths observed for the cohort. The probability...
متن کاملLoss to Follow-up After Newborn Hearing Screening and Its Related Factors
Background: Hearing loss is one of the most common birth defects and early detection of this disorder at birth is not possible without hearing screening. The aim of this study was to determine the frequency of loss to-follow-up after neonatal hearing screening and its related factors in KhoramAbad Province - Iran. Methods: This retrospective correlational study was conducted in the time period...
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ژورنال
عنوان ژورنال: Epidemiology
سال: 2013
ISSN: 1044-3983
DOI: 10.1097/ede.0b013e31827623b1