TABLE 1.

Basic characteristics and anti-SARS-CoV-2 serologic profile of 472 COVID-19 patients.

Characteristics	Categories			Baseline*	Follow-up*
Sex	Female			220 (46.6)
	Male			252 (53.4)
Age group (years)	<20			8 (1.7)
	20–29			42 (8.9)
	30–39			131 (27.8)
	40–49			167 (35.4)
	50–59			91 (19.3)
	60–69			24 (5.1)
	>70			9 (1.9)
Occupation	Health care workers			222 (47.0)
	Non-health care workers			250 (53.0)
Hospitalization	No			415 (87.9)
	Yes	CT scan −	PCR −	7 (1.5)
			PCR +	10 (2.1)
		CT scan +	PCR −	30 (6.4)
			PCR +	10 (2.1)
Anti-SARS-CoV-2 antibody	IgM	− (<1.10)		280 (59.3)	448 (94.9)
		1 + (1.10–2.99)		66 (14.0)	18 (3.8)
		2 + (3.00–5.99)		69 (14.6)	4 (0.8)
		3 + (6.00–11.99)		47 (10.0)	2 (0.4)
		4 + (≥12.0)		10 (2.1)	0 (0.0)
	IgG	− (<1.10)		29 (6.1)	196 (41.5)
		1 + (1.10–2.99)		82 (17.4)	99 (21.0)
		2 + (3.00–5.99)		58 (12.3)	60 (12.7)
		3 + (6.00–11.99)		98 (20.8)	66 (14.0)
		4 + (≥12.0)		205 (43.4)	51 (10.8)

*Numbers represent “count (percentage).”

−: negative, +: positive.

CT: computed tomography, IgG: immunoglobulin G, IgM: immunoglobulin M, PCR: reverse transcription polymerase chain reaction, and SARS-CoV-2: novel severe acute respiratory syndrome coronavirus-2.