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Table 3 Comparing presymptomatic, symptomatic and true asymptomatic group (n = 199) of patients with COVID-19

From: The prevalence and clinical significance of Presymptomatic COVID-19 patients: how we can be one step ahead in mitigating a deadly pandemic

Characteristics   Presymptomatic
n = 43 (%)
Symptomatic
n = 53 (%)
True asymptomatic
n = 103 (%)
Total
n = 199
Gender Female 18 (34.6) 14 (26.9) 20 (38.5) 52
Male 25 (17.0) 39 (26.5) 83 (56.5) 147
Age (years) 1–18 5 (22.7) 6 (27.3) 11 (50.0) 22
19–35 20 (18.1) 28 (25.5) 62 (56.4) 110
36–65 15 (28.3) 14 (26.4) 24 (45.3) 53
> 65 3 (21.4) 5 (35.7) 6 (42.9) 14
BMI** < 18.5 1 (14.2) 3 (42.9) 3 (42.9) 7
18.5–22.9 12 (30.0) 4 (10.0) 24 (60.0) 40
23–26.9 5 (15.6) 14 (43.8) 13 (40.6) 32
> 27 9 (30.0) 5 (16.7) 16 (53.3) 30
Nationality Local 29 (20.7) 39 (27.9) 72 (51.4) 140
Foreigner 14 (23.7) 14 (23.7) 31 (52.5) 59
Highest MEWS; 0 1 (50) 0 (0) 1 (50) 2
1 34 (21.7) 34 (21.7) 89 (56.6) 157
2 5 (15.6) 15 (46.9) 12 (37.5) 32
3 3 (50) 3 (50) 0 (0) 6
4 0 (0) 0 (0) 1 (100) 1
Category after re-evaluation 1 0 (0) 1 (1.1) 92 (98.9) 93
2A 27 (45.8) 32 (54.2) 0 (0) 59
2B 8 (40.0) 12 (60.0) 0 (0) 20
3A 5 (25.0) 4 (20.0) 11 (55.0) 20
3B 2 (100.0) 0 (0) 0 (0) 2
4A 1 (50.0) 1 (50.0) 0 (0) 2
4B 0 (0) 1 (100.0) 0 (0) 1
5 0 (0) 2 (100.0) 0 (0) 2
Cigarette smoker** Yes 2 (13.3) 5 (33.3) 8 (53.3) 15
Reformed 1 (12.5) 4 (50.0) 3 (37.5) 8
No 24 (23.8) 20 (19.8) 57 (56.4) 101
Blood abnormalities on admission Yes 10 (20.0) 15 (30.0) 25 (50.0) 50
No 33 (22.2) 38 (25.5) 78 (52.3) 149
Blood abnormalities during stay Yes 11 (20.0) 18 (32.8) 26 (47.2) 55
No 32 (22.2) 35 (24.3) 77 (53.5) 144
Abnormal blood indices CBC
RP
LFT
2 (33.3)
4 (20.0)
11 (20.0)
1 (16.7)
6 (30.0)
20 (36.4)
3 (50.0)
10 (50.0)
24 (43.6)
6
20
55
X-ray changes Yes 10 (33.3) 9 (30.0) 11 (36.7) 30
No 33 (19.5) 44 (26.0) 92 (54.4) 169
CT thorax performed Yes 8 (18.2) 11 (25.0) 25 (56.8) 44
No 35 (22.6) 42 (27.1) 78 (50.3) 155
Treatment Yes 20 (44.4) 19 (42.2) 6 (13.3) 45
Days to negative PCR Mean ± SD (Days) 16.9 ± 5.78 18.37 ± 7.37 15.26 ± 3.80 16.42 ± 5.50
p = 0.003***
  1. *Percentages calculated for each row equivalent to 100%
  2. **n = 199 for all variables except for BMI (n = 109), cigarette smoking (n = 124) and days to negative PCR (n = 196)
  3. ***one-way ANOVA whereby the mean difference is significant at the 0.05 level