Neuroendocrine recovery after 2-week 12-h day and night shifts: an 11-day follow-up
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Neuroendocrine recovery after 2-week 12-h day and night shifts : an 11-day follow-up. / Merkus, Suzanne L; Holte, Kari Anne; Huysmans, Maaike A; Hansen, Åse Marie; van de Ven, Peter M; van Mechelen, Willem; van der Beek, Allard J.
I: International Archives of Occupational and Environmental Health, Bind 88, Nr. 2, 02.2015, s. 247-257.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Neuroendocrine recovery after 2-week 12-h day and night shifts
T2 - an 11-day follow-up
AU - Merkus, Suzanne L
AU - Holte, Kari Anne
AU - Huysmans, Maaike A
AU - Hansen, Åse Marie
AU - van de Ven, Peter M
AU - van Mechelen, Willem
AU - van der Beek, Allard J
PY - 2015/2
Y1 - 2015/2
N2 - PURPOSE: The study aimed to investigate the course and duration of neuroendocrine recovery after 2-week 12-h day and night shift working periods and to study whether there were differences in recovery between the shift groups.METHODS: Twenty-nine male offshore employees working 2-week 12-h shift tours participated in the study; 15 participated after a day shift tour and 14 after a night shift tour. Salivary cortisol was assessed at awakening, 30 min after awakening, and before bedtime on the 1st, 4th, 7th, and 11th day of the free period, with a reference day prior to the offshore tour. Differences were tested using generalised estimating equations analysis.RESULTS: Compared to the reference day, night shift workers had a significantly flatter cortisol profile on the 1st day off, significantly lower cortisol concentrations at 30 min after awakening on day 4 and at awakening on day 7, and a significantly smaller decline to evening concentration on days 4 and 11. Compared to the reference day, day shift workers only showed a significantly lower cortisol concentration at awakening on the 1st day off. Compared to day workers, night shift workers had a flatter profile on the 1st day off and a lower cortisol concentration at awakening on the 4th day.CONCLUSIONS: Following 2-week 12-h night shift working periods, recovery was not fully complete up to day 11. Following 2-week 12-h day shift working periods, an indication of incomplete recovery was found on the 1st day off, with full recovery reached on day 4.
AB - PURPOSE: The study aimed to investigate the course and duration of neuroendocrine recovery after 2-week 12-h day and night shift working periods and to study whether there were differences in recovery between the shift groups.METHODS: Twenty-nine male offshore employees working 2-week 12-h shift tours participated in the study; 15 participated after a day shift tour and 14 after a night shift tour. Salivary cortisol was assessed at awakening, 30 min after awakening, and before bedtime on the 1st, 4th, 7th, and 11th day of the free period, with a reference day prior to the offshore tour. Differences were tested using generalised estimating equations analysis.RESULTS: Compared to the reference day, night shift workers had a significantly flatter cortisol profile on the 1st day off, significantly lower cortisol concentrations at 30 min after awakening on day 4 and at awakening on day 7, and a significantly smaller decline to evening concentration on days 4 and 11. Compared to the reference day, day shift workers only showed a significantly lower cortisol concentration at awakening on the 1st day off. Compared to day workers, night shift workers had a flatter profile on the 1st day off and a lower cortisol concentration at awakening on the 4th day.CONCLUSIONS: Following 2-week 12-h night shift working periods, recovery was not fully complete up to day 11. Following 2-week 12-h day shift working periods, an indication of incomplete recovery was found on the 1st day off, with full recovery reached on day 4.
U2 - 10.1007/s00420-014-0954-5
DO - 10.1007/s00420-014-0954-5
M3 - Journal article
C2 - 24974161
VL - 88
SP - 247
EP - 257
JO - International Archives of Occupational and Environmental Health
JF - International Archives of Occupational and Environmental Health
SN - 0340-0131
IS - 2
ER -
ID: 128643567