Case Series
A collection of case reports describing similar clinical experiences in multiple patients. Case series provide slightly stronger evidence than individual case reports and can help identify patterns that may justify formal clinical studies.
Technical Context
Case series document similar clinical observations in multiple patients (typically 3-50+) and can provide preliminary evidence of a treatment effect or safety signal that justifies formal investigation. They are retrospective (reviewing medical records) or prospective (collecting data as patients present). Case series lack a control group, making it impossible to attribute outcomes to the treatment rather than natural disease course, placebo effect, or other factors. For research peptides without clinical trial data, case series published in peer-reviewed journals represent the strongest available human-level evidence (though still far below RCT evidence). Quality assessment tools (IHE case series checklist) help evaluate the reliability of case series data.