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Table 1 Comparison of clinical characteristics between groups by duration of viral clearance

From: Factors associated with prolonged duration of viral clearance in non-severe SARS-CoV-2 patients in Osaka, Japan

  Overall Prolonged duration patients Non-prolonged duration patients p value
(n = 706) (n = 194) (n = 512)
Men, n (%) 380 (53.8) 107 (55.2) 273 (53.3) 0.66
Age, median [IQR] 45 [31–58] 47 [31–63] 45 [31–57] 0.1
Age categories
  < 30, n (%) 140 (19.8) 36 (18.6) 104 (20.3) 0.41
 30–39, n (%) 144 (20.4) 38 (19.6) 106 (20.7)  
 40–49, n (%) 130 (18.4) 33 (17.0) 97 (19.0)  
 50–59, n (%) 131 (18.6) 31 (16.0) 100 (19.5)  
 60–69, n (%) 55 (7.8) 18 (9.3) 37 (7.2)  
 70–79, n (%) 57 (8.1) 21 (10.8) 36 (7.0)  
 80+, n (%) 49 (6.9) 17 (8.8) 32 (6.3)  
Comorbidity, n (%) 199 (28.2) 68 (35.1) 131 (25.6) 0.01
 Diabetes, n (%) 51 (7.2) 19 (9.8) 32 (6.3) 0.1
 Respiratory disease, n (%) 51 (7.2) 19 (9.8) 32 (6.3) 0.1
 Coronary heart disease, n (%) 32 (4.5) 12 (6.2) 20 (3.9) 0.19
 Immunodeficiency, n (%) 8 (1.1) 4 (2.1) 4 (0.8) 0.15
 Cancer, n (%) 11 (1.6) 3 (1.6) 8 (1.6) 0.99
 Hypertension, n (%) 10 (1.4) 4 (2.1) 6 (1.2) 0.37
 Others, n (%) 103 (14.6) 36 (18.6) 67 (13.1) 0.07
Number of comorbidities, n (%)
 0 511 (72.4) 126 (65.0) 385 (75.2) 0.02
 1 134 (19.0) 44 (22.7) 90 (17.6)  
 2+ 61 (8.6) 24 (12.4) 37 (7.2)  
Symptoms
 Fever, n (%) 458 (64.9) 120 (61.9) 338 (66.0) 0.3
 Cough, n (%) 377 (53.4) 103 (53.1) 274 (53.5) 0.92
 Dyspnea, n (%) 164 (23.2) 44 (22.7) 120 (23.4) 0.83
 Digestive symptoms, n (%) 108 (15.3) 30 (15.5) 78 (15.2) 0.94
 Olfactory and taste disorders, n (%) 179 (25.4) 50 (25.8) 129 (25.2) 0.88
 Fatigue, n (%) 269 (38.1) 67 (34.5) 202 (39.5) 0.23
 Others, n (%) 367 (52.0) 94 (48.5) 273 (53.3) 0.25
Radiological findings (chest examination), n (%) 236 (33.4) 65 (33.5) 171 (33.4) 0.95
 No findings, n (%) 76 (10.8) 22 (11.3) 54 (10.6)  
 Missing, n (%) 394 (55.8) 107 (55.2) 287 (56.1)  
Duration of viral clearance from symptom onset, median [IQR] 22 [17–29] 34 [31–39] 19 [15–23] < 0.001
Location of recuperation at the time of the (first) PCR testa
 Hospital, n (%) 428 (60.7) 100 (51.6) 328 (64.2) 0.002
 Non-hospital, n (%) 277 (39.3) 94 (48.5) 183 (35.8)  
Hospitalized patients
 Duration from illness onset to admissionb, median [IQR] 7 [5–10] 10 [7–16] 7 [4–9] < 0.001
 Lengths of hospital stayc, median [IQR] 17 (12–23) 28 (22–33) 15 (10–19) < 0.001
  1. aOne case (0.1%) had missing data regarding the location of recuperation (n = 705)
  2. bSix cases (0.8%) had missing data on date of admission (overall n = 422; prolonged duration patients n = 95; non-prolonged duration patients n = 327)
  3. cEight cases (1.1%) of hospitalized patients had missing data on date of admission and/or discharge (overall n = 420; prolonged duration patients n = 93; non-prolonged duration patients n = 327)