Trabalhadores em turno de rotação inversa rápida: avaliação de fadiga e desempenho de mineradores nos diferentes horários de entrada e saída de turno

Abstract

The present study aimed to investigate the parameters Effectiveness, Cognition, Attention Lapses, Reaction Time, Total Sleep Time, Sleep Debt and Awake Time in different shifts of fast counterclowise rotation. Forty-three mining workers, with a mean age of 40.9±7.0 years, who were on the 4x1 fast counterclockwise rotation scale, participated as volunteers in this study. We used MEQ, PSQI, BAECKE questionnaires for data collection, as well as Actigraphy, Activity-Sleep Diary and Fatigue Avoidance Scheduling Tool (FAST) as the main instrument. A descriptive analysis of the data was performed, and comparisons between the analysis schedules were made using the Friedman test with multiple comparisons in pairs, corrected by 7 grade of freedom. The parameters Effectiveness, Cognition, Attention Lapses, Reaction Time, Total Sleep Time, Sleep Debt and Waking Hours were evaluated through FAST. The investigation pointed out that there are differences in the parameters obtained with the FAST instrument: Effectiveness {[x2(7)= 264,157; p<0,001]/start-start; end-end; start-end}, Cognition {[x2(7)= 258,547; p<0,001]/start-start; end-end; start-end}, Attention Lapse {[x2(7)= 258,998; p<0,001]/start-start; end-end; start-end}, Reaction Time {[x2(7)= 257,390; p<0,001]/start-start; end-end; start-end}, Total Sleep Time {[x2(7)= 204,270; p<0,001]/start-start; end-end; start-end}, Sleep Debt {[x2(7)= 269,783; p<0,001]/start-start; end-end; start-end} and Awake Time {[x2(7)= 248,755; p<0,001]/start-start; end-end; start-end} in different fast counterclockwise rotation work schedules. We can conclude that there are differences between the times of comparison of the parameters Effectiveness, Cognition, Attention Lapses, Reaction Time, Total Sleep Time, Sleep Debt and Awake Time and that these may indicate increased risk for accidents at specific moments of the fast counterclockwise rotation scale, such as the end of the dawning shift. We can also conclude that the dawning shift presented the most worrying values, with a greater possibility of inducing fatigue and decreased performance of workers, and consequently a greater risk of some type of incident or accident. We warn that there is a need to identify moments that require more attention and, if necessary, to make some kind of intervention to ensure the integrity and health of the worker.