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Table 1 Demographic and baseline characteristics of COVID-19 patients among 3 groups

From: Clinical characteristics and manifestations in older patients with COVID-19

  Younger (n = 102) Middle-aged (n = 157) Older (n = 307)
Age (years) 37.0 (32.0–41.3) 54.0 (49.5–57.0) 69.0 (65.0–76.0)
Sex
 Male 54 (52.9%) 60 (38.2%) 153 (49.8%)
 Female 48 (47.1%) 97 (61.8%) 154 (50.2%)
Typical symptoms
 Fever 71 (69.6%) 126 (80.3%) 248 (80.8%)
 Dry cough 63 (61.8%) 108 (68.8%) 183 (59.6%)
 Fatigue 38 (37.3%) 76 (48.4%) 144 (46.9%)
 Dyspnea 12 (11.8%) 26 (16.6%) 41 (13.4%)
Neurological symptoms
 Dizziness 3/102 (2.9%) 9/156 (5.8%) 16/302 (5.3%)
 Headache 5/102 (4.9%) 13/156 (8.3%) 10/302 (3.3%)
 Impaired consciousness 0 (0.0%) 0 (0.0%) 3 (1.0%)
Comorbidity
 Any 18 (17.6%) 66 (42.0%)* 222 (72.3%)*#
 Hypertension 6 (5.9%) 52 (33.1%)* 158 (51.5%)*#
 Diabetes 3 (2.9%) 19 (12.1%)* 52 (16.9%)*
 CAD 0 (0.0%) 8 (5.1%) 50 (16.3%)*#
 Cerebral infarction 0 (0.0%) 1 (0.6%) 21 (6.8%)*
 Cancer 1 (1.0%) 2 (1.3%) 9 (2.9%)
 CKD 2 (2.0%) 1 (0.6%) 7 (2.3%)
 COPD 0 (0.0%) 1 (0.6%) 7 (2.3%)
SBP (mmHg) 122.0 (116.0–130.0) 129.0 (120.0–140.0)* 134.0 (121.0–148.0)*#
DBP (mmHg) 78.0 (70.0–85.0) 80.0 (70.0–87.5) 80.0 (70.0–87.0)
Heart rate (bpm) 85.0 (76.0–98.0) 86.0 (77.5–96.0) 85.0 (77.0–98.0)
  1. Data were presented as n (%) or median (IQR). *P < 0.05 vs younger group; #P < 0.05 vs middle-aged group. CAD coronary artery disease, CKD chronic kidney disease, COPD chronic obstructive pulmonary disease, SBP systolic blood pressure, DBP diastolic blood pressure