The Effect of Long Working Hours on Blood Pressure using Sleep Quality as an Intervening Variable for Transportstion Sector Workers in Parepare, Indonesia

Background: Long working hours are various from one country to another. Long working hours can cause poor sleep quality. Therefore, the length of work can affect health and have an impact on the incidence of hypertension of workers. Objective: This study aims to analyse the effect of length of work on the incidence of hypertension and sleep quality. Also, it shows the relationship between the three variables. Method: Quantitative research with cross sectional method. Blood pressure check with automatic sphygmomanometer and Pittsburgh Sleep Quality Index (PSQI) questionnaire to assess sleep quality. The data were analysed using chi-square and logistic regression. Result: Length of work has a direct effect on sleep quality with a p value of 0.003 (<0.05) and the magnitude of the influence can be seen in the estimated value, which is equal to 0.273. Long time working on blood pressure also has a direct relationship with the p value of 0.001 (<0.05) and the magnitude effect is 1.006. Sleep quality on blood pressure also has a direct relationship with p value 0.001 (<0.05) with a large influence of 0.517. Conclusion: There is a direct and indirect relationship between length of work and blood pressure where sleep quality is the intervening variable. Working hours can directly cause hypertension and working hours can indirectly cause hypertension through sleep quality.