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. 2021 Dec 1;16(12):e0259909. doi: 10.1371/journal.pone.0259909

Table 1. Patient demographics and clinical characteristics.

Variables All Groups Severe/Critical Moderate Mild Control
N (%) N (%) N (%) N (%) N (%)
Total 113 (100%) 30 (27%) 32 (28%) 20 (18%) 31 (100%)
Demographics
 Age (years), mean (SD) 48.58 (12.53) 56.77 (10.2) 53.25 (10.4) 43.25 (10.5) 39.29 (10.28)
 Male 58 (51.3%) 23 (76.7%) 18 (56.2%) 7 (35.0%) 10 (32.3%)
 Female 55 (48.7%) 7 (23.3%) 14 (43.8%) 13 (65.0%) 21 (67.7%)
BMI categories
  Normal 28 (24.8%) 3 (10%) 3 (9.4%) 9 (45%) 13 (41.9%)
  Overweight 43 (38.1%) 12 (40%) 12 (37.5%) 6 (30%) 13 (41.9%)
  Obese 42 (37.2%) 15 (50%) 17 (53.1%) 5 (25%) 5 (16.1%)
Comorbidities
 Cardiovascular disease 9 (8%) 7 (23.3%) 2 (6.2%) 0 (0%) -
 Hypertension 37 (32.7%) 19 (63.3%) 17 (53.1%) 1 (5%) -
 Chronic pulmonary disease (asthma, COPD) 4 (3.5%) 2 (6.7%) 2 (6.2%) 0 (0%) -
 Dyslipidemia 3 (2.7%) 1 (3.3%) 2 (6.2%) 0 (0%) -
 Diabetes mellitus 14 (12.4%) 7 (23.3%) 7 (21.9%) 0 (0%) -
 History of smoking 7 (6.2%) 4 (13.3%) 2 (6.2%) 1 (5%) -
COVID symptoms at presentation -
 Cough 57 (50.4%) 21 (70%) 25 (78.1%) 11 (55%) -
 Shortness of breath 22 (19.5%) 8 (26.7%) 11 (34.4%) 3 (15%) -
 Dyspnea 33 (29.2%) 19 (63.3%) 13 (40.6%) 1 (5%) -
 Fever 48 (42.5%) 19 (63.3%) 19 (59.4%) 10 (50%) -
 Myalgia 33 (29.2%) 12 (40%) 15 (46.9%) 6 (30%) -
 Odinophagy 23 (20.4%) 11 (36.7%) 4 (12.5%) 8 (40%) -
 Rhinorrhea 14 (12.4%) 2 (6.7%) 6 (18.8%) 6 (30%) -
 Diarrhea 12 (10.6%) 7 (23.3%) 3 (9.4%) 2 (10%) -
 Vomit 3 (2.7%) 2 (6.7%) 1 (3.1%) - -
 Ageusia 10 (8.8%) 5 (16.7%) 4 (12.5%) 1 (5%) -
 Anosmia 11 (9.7%) 5 (16.7%) 5 (15.6%) 1 (5%) -
 Asthenia 35 (31%) 16 (53.3%) 15 (46.9%) 4 (20%) -
Vital signs and laboratory measures -
 Oxygen saturation > 95% 67 (59.3%) 1 (3.3%) 15 (46.9%) - -
 D-dimer, mean (SD) 3.92 (19.89) 1.98 (5.44) 0.75 (0.47) 36.49 (72.34) -
 Creatinine, mean (SD) 0.94 (0.35) 1.04 (0.48) 0.87 (0.2) 0.87 (0.15) -
 Urea, mean (SD) 36.8 (17.15) 43.55 (22.55) 32.43 (10.01) 30.11 (6.85) -
 C-reactive protein, mean (SD) 63.7 (88.1) 142.67 (99.14) 75.72 (77.87) 6.02 (4.21) 2.77 (3.87)
Chest CT category (Ground Glass Opacities) -
  0 –no GG opacities 2 (1.8%) 0 (0%) 0 (0%) 2 (15.4%) -
  I–up to 25% 32 (28.3%) 3 (10%) 18 (56.2%) 11 (84.6%) -
  II– 25%–50% 23 (20.4%) 12 (40%) 11 (34.4%) - -
  III–> 50% 18 (15.9%) 15 (50%) 3 (9.4%) - -
Metabolite and ratio measures, mean (SD)
 IDO (Kyn/Trp) 0.07 (0.07) 0.12 (0.1) 0.06 (0.03) 0.03 (0.01) -
 (Cit/Orn) 0.24 (0.11) 0.21 (0.08) 0.21 (0.09) 0.35 (0.12) -
 [(Kyn/Trp)/(Cit/Orn)] 0.39 (0.37) 0.6 (0.47) 0.36 (0.25) 0.11 (0.08) -
 (IDO/lysoPC a C18:0) 0.0027 (0.0038) 0.0046 (0.0056) 0.0020 (0.0014) 0.00092 (0.00080) -
 (Glu/PC aa C34:3) 11 (9.28) 14.93 (10.36) 11.24 (8.54) 4.73 (4.27) -
 (Asp/PC aa C34:3) 0.75 (0.56) 0.92 (0.46) 0.81 (0.68) 0.39 (0.31) -
 (IDO/PC aa C34:3) 0.01 (0.01) 0.01 (0.01) 0.01 (0) 0 (0) -
 C5 0.38 (0.31) 0.5 (0.39) 0.36 (0.24) 0.24 (0.18) -
COVID-19-related Outcomes
 Recovered/discharged 77 (68.1%) 25 (83.3%) 32 (100%) 20 -
 Required oxygen mask 18 (15.9%) 15 (50%) 18 (15.9%) - -
 OTI + Mechanical Ventilation 18 (15.9%) 18 (60%) 18 (15.9%) - -
 Tracheostomy 7 (6.2%) 7 (23.3%) 7 (6.2%) - -
 Death 5 (4.4%) 5 (16.7%) 5 (4.4%) - 0 (0%)