“…In this review, the type of instruments applied varied. Three articles used the SF-36 (Short-Form-36) instrument (17,19,24) , which is a widely used instrument in researches to obtain objective data on quality of life, with 36 questions addressing the general health status in domains that address physical function, physical components, body pain, general health, vitality, social function, emotional role and mental health; one article used a short version of SF-36, called the SF-12 (Short Form-12) (18) , with 12 easy-to-apply questions, covering the eight domains of the SF-36, but summarizing the domains in two topics, namely "summary of physical components" and "summary of mental components"; two articles derived from an original scientific study developed in Finland, in which quality of life is assessed with reference values targeting the Finnish population, applied the RAND-36 instrument (21)(22) , which covers eight domains, such as general health, physical function, physical component, body pain, emotional well-being, emotional component, social function and energy; one study used the MacNew QoL scale (20) , related to heart disease, with 27 questions that cover emotional characteristics of individuals in 14 questions, as well as physical and social characteristics in 13 questions; and one article applied the cardiac version of the Quality of Life Index (QLI) instrument (23) , which addresses 32 items in four subscales of functional capacity and health, socioeconomic components, psychological/spiritual components, and family.…”