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Medicina y Seguridad del Trabajo

versión On-line ISSN 1989-7790versión impresa ISSN 0465-546X


GONZALEZ ESPINEL, Francisco Javier et al. Emotional and phisical effects after continued night shift by internal medical resident. Med. segur. trab. [online]. 2019, vol.65, n.257, pp.252-260.  Epub 22-Mar-2021. ISSN 1989-7790.


Medical Internal Residents perform 17-hour shifts at Spanish hospitals. Such night work causes an alteration of the circadian rhythm that can trigger disturbances in the physical and emotional state.


To know the degree of physical and emotional affectation that the night shifts generate in Medical Residents and the factors that affect this relationship.

Material and methods:

Before and after their 17-hour shift, the randomized participants from a tertiary referral hospital complete a questionnaire with socio-demographic variables and tests validated in their Spanish version: Positive and Negative Affect Schedule, Swedish Occupational Fatigue Inventory and the subscale of hierarchical support of KARASEK


Statistical analysis of n = 150 residents of a hospital was carried out. Among the residents who drive after the 17-hour shift, 17.98% suffered a commuting accident. The pleasant experiences were reduced after shifts in a statistically significant difference (p <0.05), compared to the discomforting ones. The highest degree of fatigue after shifts is focused on drowsiness, and to a lesser degree, on a lack of motivation.


This study supposes a validated estimate of the effects of the continuous work shift of Medical Residents. The results obtained could suggest reconsidering the organization of work given the negative effects for the well-being of future physicians.

Palabras clave : Physicians; shift work; circadian rhythm; health impacts.

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