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Updated: Apr 12, 2026

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Published on: April 26, 2024
Increased daylight availability reduces length of hospitalisation in depressive patients
Francesca Canellas1,2, Luisa Mestre3, Miriam Belber3
1Psychiatry Department, Hospital Universitari Son Espases, Ctra. deValldemossa n°79, 07010, Palma de Mallorca, Balearic Islands, Spain. francesca.canellas@ssib.es.
Abstract:
In a retrospective study, hospital stay in two hospitals was compared for depressive patients. The mean amount of accumulated light impinging the patient's area was 86,145 lux/light period in Hospital Universitari Son Dureta and 258,909 lux/light period in Hospital Universitari Son Espases (~300 % increase). The median stay was 14 days (1q-3q 8-19, n = 101) and 11 (1q-3q 6-15, n = 106) days, respectively. The reduction was significant only for the entire group, though not for subgroups (p < 0.007). Although the light received was not individually measured, results point to a significant effect of light in the recovery time of depressive patients. Prospective studies are needed.
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