Table 3.

Logistic regression model of independent variables associated with SpO2 levels in patients with COVID-19

Variables	aOR	95% Confidence Interval		P value
		Lower	Upper
Age (years)
0–19	1
20–39	0.52	0.492	0.563	< 0.001
40–59	0.94	0.889	1.010	0.09
60 and over	1.51	1.422	1.616	< 0.001
Sex
Women	1
Men	1.15	1.124	1.181	< 0.001
Residing area
West	1
Central, South	1.15	1.11	1.20	< 0.001
North, East	1.66	1.622	1.712	< 0.001
Positive history of smoking	0.82	0.747	0.904	< 0.001
Positive history of opioids	1.15	1.027	1.306	0.01
Positive history of exposure to SARS-CoV-2	1.76	1.724	1.815	< 0.001
Positive chest CT findings	3.10	2.956	3.256	< 0.001
Underlying diseases
Diabetes	0.92	0.890	0.968	< 0.001
Hypertension	1.12	1.083	1.174	< 0.001
CVD	0.74	0.717	0.780	< 0.001
Cancer	0.916	0.842	0.997	0.43
Asthma	1.03	0.933	1.154	0.49
Chronic respiratory diseases	1.26	1.147	1.398	< 0.001
Chronic liver diseases	0.86	0.726	1.030	0.10
Chronic kidney diseases	0.89	0.828	0.976	0.01
Chronic neurological diseases	1.12	0.989	1.271	0.07
Chronic immune deficiency diseases	1.08	0.868	1.359	0.47
Chronic haematological diseases	0.85	0.722	1.020	0.82
HIV/AIDS	1.34	0.865	2.096	0.18
Clinical presentations
Fever	1.40	1.370	1.444	< 0.001
Cough	0.99	0.970	1.021	0.70
Muscle ache	0.88	0.861	0.910	< 0.001
Difficulty breathing	2.43	2.369	2.493	< 0.001
Chest pain	0.99	0.926	1.067	0.87
Loss of smell	1.00	0.915	1.107	0.89
Loss of taste	1.07	0.949	1.215	0.26
Loss of appetite	0.99	0.940	1.045	0.73
Nausea	1.02	0.967	1.080	0.44
Diarrhea	0.81	0.764	0.879	< 0.001
Headache	0.84	0.802	0.891	< 0.001
Vertigo	0.95	0.880	1.042	0.31
Impaired consciousness	2.26	2.115	2.419	< 0.001
Seizure	1.01	0.812	1.272	0.88
Paresis	1.07	0.907	1.285	0.39
Paraplegia	0.87	0.648	1.192	0.40
Skin lesions	1.57	1.055	2.362	0.02
Constant	0.152			< 0.001