Even though setting the clocks back during winter leads to an extra hour of sleep, the added hour of darkness in the evening is harder to handle, according to a new study.
Depression cases at psychiatric hospitals in Denmark increased immediately after the transition from daylight saving time, the study says. An analysis of 185,419 severe depression diagnoses from 1995 to 2012 showed an 11% increase during this time period. The cases dissipated gradually after 10 weeks.he hour of daylight lost in the afternoon is a time when many people are exposed to the outdoors, because of their commutes or other transitional factors. But the hour of daylight gained in the morning typically occurs when people are indoors and preparing for the day ahead. We don’t benefit directly from the morning light outdoors this way, Rosenthal said.
Can light therapy treat non-seasonal depression too?