Table 2.

Cox models in COVID-19 positive subset (N = 1,925).

Characteristics		COVID-related survival				Overall survival
		HR (95% CI)	P	AHR (95% CI)	P	HR (95% CI)	P	AHR (95% CI)	P
Age, years		1.18 (1.13–1.24)	<0.001	1.17 (1.11–1.23)	<0.001	1.18 (1.13–1.23)	<0.001	1.17 (1.12–1.23)	<0.001
Male (vs. female)		2.96 (1.56–5.63)	0.001	1.79 (0.93–3.45)	0.082	2.40 (1.39–4.16)	0.002	1.48 (0.85–2.60)	0.168
White (vs. others)		2.40 (0.33–17.41)	0.385	0.89 (0.12–6.63)	0.908	1.69 (0.41–6.95)	0.465	0.68 (0.16–2.88)	0.601
Ever smoke (vs. never)		2.90 (1.56–5.39)	0.001	1.71 (0.88–3.34)	0.113	2.43 (1.42–4.15)	0.001	1.41 (0.79–2.50)	0.245
Comorbidity Index†		1.43 (1.28–1.59)	<0.001	1.25 (1.09–1.44)	0.001	1.41 (1.27–1.55)	<0.001	1.23 (1.08–1.39)	0.002
Ever taken cannabis (vs. others)	Any times	0.50 (0.23–1.12)	0.092	0.87 (0.38–2.02)	0.753	0.52 (0.26–1.05)	0.068	0.89 (0.42–1.86)	0.749
	≥3 times	0.69 (0.27–1.73)	0.426	1.58 (0.60–4.16)	0.357	0.54 (0.22–1.36)	0.191	1.17 (0.45–3.02)	0.750
	≥1/month‡	1.28 (0.51–3.24)	0.598	2.81 (1.04–7.59)	0.041	1.00 (0.40–2.49)	0.993	1.93 (0.73–5.08)	0.185

HR, hazard ratio; 95% CI, 95% confidence interval; AHR, adjusted hazard ratio.

^†Charlson-Quan Comorbidity Index was calculated by summing all the weights (from 1 to 6) of each comorbidity category based on inpatient ICD-10 records.

^‡Maximum frequency of taking cannabis.