Table 3.

Odds ratio (95% confidence interval) for 1-month post-stroke depression by season

	Post-stroke depression
	OR (95% CI)	P-value
Unadjusted Model	2.14 (1.28–3.58)	0.003
Model 1	2.15 (1.28–3.60)	0.003
Model 2	2.23 (1.28–3.88)	0.005
Model 3	2.60 (1.43–4.72)	0.002
Model 4	1.87 (0.98–3.56)	0.064

Take summertime as the referent category. Model 1 included age and gender. Model 2 included model 1 and added BMI, history of hyperlipidemia, history of Diabetes mellitus, history of Coronary heart disease, history of stroke, smoke, alcohol consumption. Model 3 included model 2 and added admission NIHSS score, and stroke subtype. Model 4 included model 3 and added vitamin D

OR odds ratios, CI confidence intervals