4 ms·
This was an observational study, not a randomized control trial. Access to care is one plausible confounder. Individuals who receive treatment may differ system
by briandw 1y ago
This was an observational study, not a randomized control trial.
Access to care is one plausible confounder. Individuals who receive treatment may differ systematically in socioeconomic status, healthcare access, parental advocacy, comorbidities—from those who do not, affecting outcomes.
- nialse 1y agoHaven't read the study yet, though I've been associated with research at the same department. Usually the study design is using matched controls which negates the effect of the parameters you mention. Sweden basically has free healthcare so there is not much difference in access to care, and controlling for the potential residual factors makes studies results quite stable.