Table 2.

Baseline characteristics of COVID-19 patients based on the presence of Long COVID.

Variables	Long COVID		P-value	OR	95% CI
	No	Yes
Number	211 (81.15%)	49 (18.85%)
Age (years)	46.36 (21.94%)	57.06 (19.59%)	0.001	-	-
<60	143 (67.77%)	18 (8.53%)	Reference
≥60	67 (31.75%)	31 (14.69%)	<0.001	3.676	1.920–7.036
Gender
Female	120 (56.87%)	35 (71.43%)	0.064	1.896	0.963–3.731
Male	91 (43.13%)	14 (28.57%)	Reference
BMI (kg/m2)	24.63 (5.84%)	25.91 (5.66%)	0.166	-	-
<25	85 (40.25%)	28 (57.14%)	Reference
≥25	126 (59.72%)	21 (42.86%)	0.034	0.506	0.27–0.949
Virus strains
Delta	0	5 (10.20%)	Reference
Omicron	211	44 (89.80%)	0.999	N/A	N/A
Omicron (BA.1)	1 (0.47%)	11 (22.45%)	-	-	-
Omicron (BA.2)	116 (54.98%)	33 (67.35%)	-	-	-
Omicron (BA.2.12.1)	3 (1.42%)	0 (0.00%)	-	-	-
Omicron (BA.2/BA.5)	1 (0.47%)	0 (0.00%)	-	-	-
Omicron (BA.4)	6 (2.84%)	0 (0.00%)	-	-	-
Omicron (BA.4/BA.5)	2 (0.95%)	0 (0.00%)	-	-	-
Omicron (BA.5)	82 (38.86%)	0 (0.00%)	-	-	-
Vaccination status
No	26 (12.32%)	5 (10.20%)	0.681	0.809	0.294–2.224
Yes	185 (87.68%)	44 (89.80%)	Reference
Comorbidities
Chronic diseases
No	132 (62.56%)	14 (28.57%)	Reference
Yes	79 (37.44%)	35 (71.43%)	<0.001	4.177	2.117–8.242
Diabetes mellites
No	181 (85.78%)	32 (65.31%)	Reference
Yes	30 (14.22%)	17 (34.69%)	0.001	3.205	1.586–6.479
Hypertension
No	177 (83.87%)	20 (40.82%)	Reference
Yes	34 (16.11%)	29 (59.18%)	<0.001	7.549	3.833–14.865
Infectious diseases
No	210 (99.53%)	49 (100.00%)	Reference
Yes	1 (0.47%)	0 (0.00%)	1.000	N/A	N/A

P-values marked with bold indicate statistically significant differences between the groups.

Abbreviations: CI, confidence interval; COVID-19, coronavirus disease 2019; N/A, not available; OR, odds ratio.