[Inability to work: analysis of sickness benefits granted in the State of Rondônia].

This is a descriptive epidemiological study aiming to o estimate the prevalence and duration of sickness benefits granted by the Brazilian Social Security Institute, as well as the clinical causes of inability to work among employees in Rondonia in 2008. The prevalence was submitted by 10,000 workers and stratified by sex, age, diagnosis, economic activity, and type and duration of benefits. Men had a higher prevalence and duration of benefits. Social security benefits were found to be 2,5 times more prevalent than accident benefits and both increased with age. Labor accidents were more prevalent in the age group ranging between 50-59 years, and Forestry, construction and manpower leasing: had the highest prevalence. The main diagnostic groups were injuries, musculoskeletal system disorders and digestive diseases. The duration of the sickness benefits was higher among men, =40 years and in the social security category. The economic activity is an important risk factor for Inability to work, and it needs to be further explored in order to improve sickness prevention and reduce the impact on workers' health arising from environmental conditions and working processes.