Table 1. Baseline characteristics of patients with COVID-19.

Characteristic	Total patients (n=59)	Newly admitted# (n=32)	Hospitalized for ≥2 weeks (n=27)	P value†
Age, years (mean ± SD)	41.8±19.3	32.7±16.6	52.5±16.7	<0.001*
Sex (male/female)	35/24	18/14	17/10	0.27
Source (domestic/imported) {imported: Great Britain [7], Italy [6], Iran [4], Spain [4], America [4], France [3], Switzerland [1]}	30/29	3/29	27/0	<0.001*
Days from symptom onset to conjunctival swab sampling	19.3±14.6	8.0±7.1	33.2±7.9	<0.001*
Days from admission to conjunctival swab sampling	13.2±13.9	1.1±0.3	27.4±6.1	<0.001*
Clinical type on sampling (mild/common type)	22/37	22/10	0/27	<0.001*
CD4 count	665.3±317.6	611.3±276.7	740.3±359.9	0.14
ESR, mm/h	35.3±34.2	31.7±35.6	40.6±32.1	0.38
Serum antibody against SARS-CoV-2 (positive%)	54.8%	34.5%	100%	<0.001*

^#, one newly-admitted patient (#16) was treated with hydroxychloroquine for one day before sampling. Other newly-admitted patients did not have any medication before sampling. ^†, t-test was used to compare the difference between those newly admitted and hospitalized for ≥2 weeks. *, P<0.05. COVID-19, coronavirus disease 2019; ESR, erythrocyte sedimentation rate.