biostatistics
Meaning of biostatistics: Biostatistics applies statistical methods to biological and health data to answer questions about disease, risk, and treatment effectiveness.
Definition of biostatistics
Biostatistics is the branch of statistics concerned with collecting, analyzing, and interpreting data drawn from biology, medicine, and public health. It provides the methods researchers use to design studies, summarize results, and determine whether an observed pattern, such as a difference between two treatments, is likely to reflect a real effect rather than chance variation.
Biostatistical methods are used to estimate how common a disease is within a population, to identify factors that raise or lower the risk of developing a condition, and to evaluate whether a new treatment performs better than an existing one in a clinical trial. The field also underlies the sample size calculations and statistical tests reported in most published medical research.
Because biostatistics translates raw health data into conclusions that guide clinical practice and public health policy, its methods are central to how modern medicine evaluates evidence rather than relying on individual clinical impressions alone.
Also known as
Used in a sentence
Biostatistics was used to analyze whether the difference in outcomes between the two treatment groups was significant.
Good to know
A statistically significant result in biostatistics indicates that an effect is unlikely to be due to chance, which is a distinct question from whether the effect is large enough to matter clinically.
Word origin
Where “biostatistics” comes from
Formed from Greek bios, meaning life, combined with statistics, a term rooted in Latin status, meaning state or condition.