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Results: Ten observational studies met the inclusion criteria; these studies varied widely with regard to population, choice of control group, ascertainment of exposure and outcome, and adjustment for potential confounders.
In particular, we discuss consideration of structure function relationships, selection of tests appropriate to the population, choice of materials and issues of intellectual property, consideration of variables which can confound studies of cognition in HD, practice effects, and specific issues for multi-site research.
Qualitative extrapolation and quantitative modeling of data regarding study duration, patient population, choice of comparator, and type of outcomes.
Modeling is expected to be performed wherever possible and appropriate, e.g. for study duration, patient population, choice of comparator, and type of outcomes.
In England, however, both qualitative and quantitative extrapolation is performed to adjust data if the study duration, patient population, choice of comparator, or type of outcomes is not directly relevant for the appraisal decision.
Modeling is not acceptable for benefit assessment in Germany but is expected to be performed for HTA in England wherever possible and appropriate, e.g. for study design features such as study duration, patient population, choice of comparator, and type of outcomes.
Similar(50)
We performed a descriptive analysis of the sample, stratified by gender, and we calculated odds ratios (OR) with 95% confidence intervals (95% CI) and p values to assess the role of socio-demographic factors (i.e., age, gender, education) and health history variables (i.e., chronic disease in the last year) on health-correlated use of the Internet and its effects on population choices.
It has been generalized to variable-population choice problems, so as to formalize population ethics in the tradition of Parfit (1984).
These conflicting results could be explained by differences in patient populations, choice of stimuli or methods used.
The wide range and crude categorisation of tea consumption, different study populations, choice of controls, inadequate control for confounding, and inevitable recall bias might have obscured possible relationships.
While this helps mitigate concerns about selection bias in the policy population, the choice to adopt a policy, rather than having it imposed on schools, may generate different results.
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