A Chinese Lunar New Year countdown to trustworthy medical research: Eight traditions, eight statistical checkpoints

This article offers a practical guide to strengthening medical and public health research by pairing eight familiar rituals from the northern Chinese Lunar New Year countdown with eight research principles. Using an accessible cultural narrative, we emphasize sticking to a clearly stated research aim and estimand to avoid aim-drift and data dredging; auditing and cleaning data in a fully traceable, code-based workflow; handling variable derivation, coding, nonlinearity, and interactions in ways that preserve information and support interpretation; ensuring adequate and representative sampling aligned with the study purpose; addressing missing data and outliers with explicit assumptions, transparent primary analyses, and sensitivity analyses; choosing graphics that reveal distributions and uncertainty and using diagnostic plots to check modeling assumptions; validating prediction models through resampling and, where possible, external validation with attention to discrimination, calibration, and clinical utility; and communicating findings with appropriate caution by focusing on effect sizes, uncertainty, and the limits of observational inference. Together, these eight checkpoints translate best practices in design, analysis, and reporting into concrete steps intended to reduce avoidable errors and improve the trustworthiness of research based on real-world data.