background: chronic pain is a frequent disability that negatively affects patient’s quality of life. understanding of the possible relation between sociodemographic and medical variables with health related quality of life (hrql) may help identifying the multidimensionality of pain and risk factors that limit physical and psychological adjustment of the patients. the present study was done to f...

One of the most frequently asked questions about health surveys such as the SF-36® is "what do the numbers mean"? Health status scores are abstractions, which obtain meaning through knowledge of how the scores are related to other variables. Although we may not think about it, this is also true for more commonly used measures. For example, a temperature of 0°C is an abstract number, which becom...