Table 3. Long-term COVID-19-related diseases in opium users and non-opium users based on the disease severity.

Variables		Opium non-user (n = 225)	Opium user (n = 56)	p-value
Non severe COVID-19
	Heart disease (positive)	6 (6)	8 (23)	0.005*
	Lung disease (positive)	1 (1)	10 (29)	< 0.001*
	Kidney disease (positive)	1 (1)	1 (3)	0.444*
	Hospitalization days	5 [4, 5.6]	5.5 [3, 6.25]	0.978†
	Overall mortality	-	-	-
Severe COVID-19
	Heart disease (positive)	7 (6)	0	0.594*
	Lung disease (positive)	0	4 (19)	< 0.001*
	Kidney disease (positive)	2 (1.7)	0	> 0.999*
	Hospitalization days	5 [4, 7]	6 [5, 7]	0.114†
	Overall mortality	0	1 (5)	0.148*

Data are presented as number (%) or median (interquartile range).

COVID-19, coronavirus disease 2019.

^*χ² and ^†Mann Whitney test Q2 [Q1–Q3] were used for statistical comparisons.