Table 2.

Cox regression models of time to having depressive symptoms, 2011–2018.

Variable	Hazard Ratio (95% CI)
Apparent temperature
High temperature	1.027(1.013–1.041) ***
Low temperature	1.023(1.011–1.035) ***
Extreme hot
Tropical nights	1.344(1.127–1.602) ***
Summer days	0.581(0.265–1.273)
Warm nights	1.048(0.856–1.284)
Warm days	0.801(0.63–1.017) *
Warm spell durations	0.836(0.698–1.002) *
Extreme cold
Frost nights	1.166(0.981–1.386) *
Ice days	1.289(1.114–1.491) ***
Cool nights	2.064(1.507–2.825) ***
Cool days	1.315(1.061–1.631) **
Cold spell durations	1.645(1.306–2.072) ***

Note: *, **, and *** indicate significance at 10%, 5%, and 1% levels, respectively.