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. 2021 Feb 18;9(2):172. doi: 10.3390/vaccines9020172

Table 3.

Clinical characteristics of patients.

Influenza Vaccine 2020 SARS-CoV-2 Vaccine 2020
Unlikely Likely Undecided p-Value Unlikely Likely Undecided p-Value
n (%) n (%) n (%) n (%) n (%) n (%)
COVID-19 status 0.495 0.110
Confirmed 192 (33.1) 261 (45.0) 127 (21.9) 146 (25.3) 239 (41.3) 193 (33.4)
Suspected 4 (21.0) 11 (57.9) 4 (21.0) 3 (15.8) 5 (26.3) 11 (57.9)
Symptomatic COVID-19 0.313 0.153
No 13 (23.6) 29 (52.7) 13 (23.6) 8 (14.5) 28 (50.9) 19 (34.5)
Yes 182 (33.6) 242 (44.7) 117 (21.6) 141 (26.2) 213 (39.5) 185 (34.2)
Duration of symptoms, days 0.144 0.273
<7 13 (35.1) 18 (48.6) 6 (16.2) 6 (16.2) 20 (54.0) 11 (29.7)
7–13 23 (47.9) 15 (31.2) 10 (20.8) 14 (29.2) 16 (33.3) 18 (37.5)
14–20 18 (30.5) 21 (35.6) 20 (33.9) 13 (22.4) 17 (29.3) 28 (48.3)
21–30 17 (27.9) 31 (50.8) 13 (21.3) 15 (24.6) 24 (39.3) 22 (36.1)
31–60 43 (30.9) 65 (46.7) 31 (22.3) 30 (21.7) 59 (42.7) 49 (35.5)
>60 34 (43.0) 28 (35.4) 17 (21.5) 26 (32.9) 28 (35.4) 25 (31.6)
Hospital admission 0.001 0.800
No 160 (36.2) 178 (40.3) 104 (23.5) 111 (25.2) 174 (39.5) 155 (35.2)
Hospital ward 32 (23.9) 78 (58.2) 24 (17.9) 32 (23.9) 61 (45.5) 41 (30.6)
ICU 4 (17.4) 16 (69.6) 3 (13.0) 6 (26.1) 9 (39.1) 8 (34.8)
Length of stay, days 0.723 0.336
0–3 6 (20.0) 18 (60.0) 6 (20.0) 6 (20.0) 15 (50.0) 9 (30.0)
4–7 8 (25.8) 19 (61.3) 4 (12.9) 5 (16.1) 17 (54.8) 9 (29.0)
8–14 9 (28.1) 20 (62.5) 3 (9.4) 12 (37.5) 16 (50.0) 4 (12.5)
15–30 4 (28.6) 10 (71.4) 0 (0.0) 5 (35.7) 7 (50.0) 2 (14.3)
>30 0 (0.0) 4 (100) 0 (0.0) 1 (25.0) 1 (25.0) 2 (50.0)
Severity classification 0.086 0.486
Asymptomatic 13 (23.6) 29 (52.7) 13 (23.6) 8 (14.5) 28 (50.9) 19 (34.5)
Mild disease 151 (36.9) 162 (39.6) 96 (23.5) 106 (26.0) 158 (38.8) 143 (35.1)
Moderate disease 22 (23.7) 55 (59.1) 16 (17.2) 26 (28.0) 39 (41.9) 28 (30.1)
Severe disease 6 (25.0) 15 (62.5) 3 (12.5) 4 (16.7) 11 (45.8) 9 (37.5)
Critical illness 3 (20.0) 10 (66.7) 2 (13.3) 5 (33.3) 5 (33.3) 5 (33.3)
Recovering signs and feeling 0.551 0.272
No 39 (29.6) 65 (49.2) 28 (21.2) 40 (30.3) 53 (40.1) 39 (29.5)
Yes 151 (33.6) 198 (44.0) 101 (22.4) 107 (23.8) 185 (41.2) 157 (35.0)
Symptoms of persistence 0.580 0.063
No 122 (34.1) 162 (45.2) 74 (20.7) 77 (21.6) 149 (41.8) 130 (36.5)
Yes 74 (30.7) 110 (45.6) 57 (23.6) 72 (29.9) 95 (39.4) 74 (30.7)

Legend: ICU, intensive care unit.