4 ms·

Is this based on an intervention study or were they just looking for correlations?

• londons_explore 2y ago
  looks like correlation to me... Intervention studies are so huge one rarely gets statistical power because there are normally only ~10 participants...
  • voisin 2y ago
    Why are they so much more expensive to run? Is it labour? If so is there a way to bring the cost down by leveraging some technology?
    • deleted 2y ago
      [deleted]
    • TylerE 2y ago
      For observational studies the data has often already been collected. Annually survey a few tens of thousands of people, anonymize that, store it... in 10 or 20 years you go back and see how those people did. Induct a new cohort each year. The same base data can be used for an infinite number of studies.