From: Is there a negative impact of winter on mental distress and sleeping problems in the subarctic: The Tromsø Study
Season for attending the study
Polar night
Spring
Polar day
Autumn
χ21
p1
HSCL-10 score
1.26 (0.36)2
1.25 (0.35)2
1.27 (0.37)2
5.514
0.3189
High mental distress 3
206 (7.7)4
107 (6.6)4
97 (8.0)4
180 (7.3)4
2.767
0.420