Ethical Problems of Observational Studies and Big Data Compared to Randomized Trials

Area of Science:

• Clinical Research Methodology
• Medical Ethics

Background:

• The increasing availability of large datasets and computational power makes prospective observational studies (POS) an attractive alternative to randomized controlled trials (RCTs).
• Historically, the choice between POS and RCTs has been debated, but technological advancements amplify this decision's significance.

Purpose of the Study:

• To compare the potential consequences of using POS versus RCTs for evaluating new treatments.
• To highlight the methodological and ethical differences between POS and RCTs.

Main Methods:

• Comparison of two hypothetical studies: one RCT and one POS, evaluating a new treatment.
• Analysis of patient information, treatment allocation, risk assessment, and consent processes in both study designs.

Main Results:

• POS expose more patients to inferior research methodology compared to RCTs.
• RCTs ensure clear patient information and balanced risk through 1:1 randomized allocation.
• In POS, the risks of receiving inferior treatment are difficult to estimate, and patient consent may be compromised.

Conclusions:

• Shifting from RCTs to POS in clinical research carries significant risks.
• POS may undermine patient autonomy, informed consent, and research integrity due to potential biases and lack of transparency.
• RCTs remain the gold standard for ensuring patient safety and ethical research conduct.