Five-year prevalence of recurrent shoulder dislocation in the entire Polish population

The aim of this study was to evaluate five-year prevalence of recurrent shoulder dislocation in the entire Polish population.

The study involved the entire Polish population between 01 January 2010 and 31 December 2014. Demographic data were retrieved from the Central Statistical Office of Poland. Data on the number of shoulder joint dislocations were retrieved from the database of the National Health Fund.

We identified 32,253 Polish residents with shoulder instability. About 0.1% of Polish residents suffered from recurrent shoulder dislocation. Males suffered almost two times more often than females (66% and 34%, respectively), and male gender was recognized as a risk factor of instability (OR = 2.07, p <10^-10). Females in their eighth decade of life had the highest risk of recurrent shoulder dislocation (OR = 3.33, p <10^-10). In males the highest risk of recurrences was noted for the third decade of life (OR = 1.78, p <10^-10).

The period prevalence rate of recurrent shoulder dislocation in Poland is 83.7 per 100,000 persons per five years. The rate of recurrent shoulder dislocation for the general Polish population is 0.1%. Males suffered from recurrent shoulder dislocation almost twice as frequently as females (OR = 2.07).