Table 1. Baseline characteristics of enrolled adult cases with acute respiratory illness.

Baseline demographic and clinical characteristics (total no. = 5,459)	Data (n, %)
Male sex - no. (%)	2356 (42.9%)
Age (year) - mean (range)	48.8 (18-99)
Age (group) - no. (%)	3976 (72.8)
18-64 years	1483 (27.2)
65-99 years
Comorbidity - no. (%)	2841 (52)
Hypertension	1197 (22.9)
Diabetes mellitus	670 (12.3)
Solid cancer	356 (6.5)
Chronic heart disease	322 (5.9)
Cerebrovascular disease	256 (4.7)
Asthma	163 (3)
Chronic kidney disease	156 (2.9)
Chronic liver disease	130 (2.4)
Autoimmune disease	113 (2.1)
Chronic obstructive pulmonary disease
Neuromuscular disease	80 (1.5)
Hematologic malignancy	39 (<0.1)
Solid organ transplantation	11 (<0.1)
Bone marrow transplantation	1 (<0.1)
HIV/AIDS	17 (<0.1)

HIV, human immunodeficiency virus; AIDS, acquired immune deficiency syndrome