When testing new treatments, drugmakers must show that their formulation bears out better results than a placebo in clinical trials. In fact, the new drug must outperform the placebo by a statistically significant margin using a measurement called “p-value.”

In this short video, STAT national biotech reporter Damian Garde explains what p-value is, how it is used, and why it is still considered the gold standard for statistical significance, despite its shortcomings.

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Founded in 2015, STAT is a global digital media brand that focuses on delivering fast, deep, and tough-minded journalism about the life sciences industries to over six million monthly site visitors and an additional 20 million readers on the Apple News app. STAT takes you inside academic labs, biotech boardrooms, and political backrooms, casting a critical eye on scientific discoveries, scrutinizing corporate strategies, and chronicling the roiling battles for talent, money, and market share. With an award-winning newsroom, STAT provides indispensable insights and exclusive stories on the technologies, personalities, power brokers, and political forces driving massive changes in the life sciences industry — and a revolution in human health.