Clinical Practice (assessment, diagnosis, treatment, knowledge translation/EBP, implementation science, program development)
Objective : To evaluate the prevalence and factors associated with dynapenia among individuals aged 50 and over in Brazil.
Design : Cross-sectional study.
Setting : This study used baseline data from the ELSI-Brazil Study (Brazilian Longitudinal Study of Aging).
Participants (or Animals, Specimens, Cadavers) : Individuals aged 50 and over were included.
Interventions : Not applicable.
Main Outcome Measure(s) : The dependent variable was dynapenia, defined as low muscle strength (< 30kg for men and < 20kg for women). Socio-demographic characteristics, health conditions, health-related behaviors and physical performance were included in the logistic model as covariates. Population attributable fractions (PAF) were calculated for the factors significantly associated with the outcome.
Results : A total of 8,386 participants aged 50 and over (53.3% female) were investigated. The prevalence of dynapenia was 31.3%, 11.8% among men and 19.5% among women. The presence of dynapenia was positively associated with age, low gait speed, self-reported limitation in two or more basic activities of daily living (BADL), gender, falls, hospitalization and chronic diseases. Dynapenia was negatively associated with education level, physical activity and body mass index-BMI (overweight/obese, OR 0.28). Approximately 9% of dynapenia was be attributable to modifiable risk.
Conclusions : This study indicates that dynapenia is prevalent in Brazilian individuals aged 50 and over and is related to a set of socioeconomic and general health factors.