In medicine, the number needed to harm (NNH) is an epidemiological measure that indicates how many persons on average need to be exposed to a risk factor over a specific period to cause …

Mar 25, 2015 · The number needed to harm (NNH) is a derived statistic that tells us how many patients must receive a particular treatment for 1 additional patient to experience a particular …

NNH (Number Needed to Harm) and NNT (Number Needed to Treat) represent two sides of the same coin, providing information about the risks and benefits of treatments or interventions.

Jun 25, 2025 · For any NNT, the magnitude of the treatment effect needs to be taken into consideration as well as any associated side effects. For any NNH, the number of patients …

Number Needed to Harm (NNH) is a measure of how many people need to be treated (or exposed to a risk factor) in order for one person to have a particular adverse effect.

When an experimental treatment is detrimental, the term 'number needed to harm' (NNH) is often used. The equations and approach are identical to those described above, except that NNH …

What is Number Needed to Harm (NNH)? The NNH is an epidemiological statistic that estimates the risk of an adverse event related to a specific treatment or intervention. It represents the …

Feb 21, 2021 · Number needed to harm (NNH) refers to the average number of patients who need to be exposed to some risk factor to cause harm in an average of one person who would not …

Jun 25, 2025 · The Number Needed to Harm (NNH) shows how many patients would need to receive a treatment for one person to experience a harmful side effect. An NNH of 100 means …

Apr 26, 2024 · Number Needed to Harm (NNH) is a statistical measure used to determine the number of individuals who need to be exposed to a certain risk factor for one additional person …