Statistical inference and effect measures in abstracts of randomized controlled trials, 1975-2021. A systematic review.

Reporting of statistical inference in abstracts of RCTs has increased over time. Increasingly, p-values and confidence intervals are reported rather than just mentioning the presence of "statistical significance". The reporting of odds ratios comes with the liability that the untrained reader will interpret them as risk ratios, which is often not justified, especially in RCTs.