https://www.selleckchem.com/pr....oducts/iruplinalkib.
This selection bias would lead to a systematic underestimation of the cost reduction produced by preventive interventions. Prevention course participants seem to have characteristics that differ from the average population (higher health orientation level, preference for prevention over medical treatment services, etc.) and cannot be captured by secondary data; therefore, matchings based on secondary data alone cause selection bias. Including both primary and secondary data reduces the risk of selection bias in matching procedures
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