Prevalence and epidemiological characteristics of chronic pain in the Spanish population. Results from the pain barometer.

Background: Chronic pain (CP) is a public health problem worldwide.

Aim: To update the prevalence of CP and compare the clinical and social characteristics of people with CP with those with non-chronic continuous pain and a group without pain.

Methods: An observational cross-sectional study was carried out in a representative sample of 7058 adults from the Spanish population.