Table 1 Negative conversion of viral RNA among 603 cases with Univariate analysis
Factors | Count (%) | Negative conversion rate (%) | \(\mathbf X^2\)1Â | P | ||
|---|---|---|---|---|---|---|
7Â days | 14Â days | 21Â days | ||||
Sex | ||||||
 Male | 336(55.7) | 9.5 | 76.8 | 97.3 | 2.335 | 0.126 |
 Female | 267(44.3) | 9.0 | 76.4 | 98.3 | ||
Age | ||||||
  < 3 | 373(61.9) | 3.5 | 73.2 | 98.7 | 32.054 | 0.000* |
 -5 | 107(17.7) | 14.0 | 83.2 | 97.2 |  |  |
 6–11 | 96(15.9) | 25 | 86.5 | 99.0 |  |  |
 12–17 | 27(4.8) | 30.0 | 85.2 | 88.9 | ||
BMI | ||||||
 Underweight | 91 (15.1) | 18.7 | 73.6 | 95.6 | 2.485 | 0.478 |
 Normalweight | 277 (45.9) | 9.4 | 77.6 | 97.8 | ||
 Overweight | 121 (20.1) | 9.9 | 78.5 | 99.2 | ||
 Obesity | 114 (18.9) | 10.7 | 79.8 | 99.1 | ||
Underlying conditions2 | ||||||
 No | 454(75.3) | 11.5 | 79.7 | 98.5 | 2.530 | 0.112 |
 Yes | 149(24.7) | 10.7 | 71.1 | 95.6 | ||
Allergic history | ||||||
 No | 495(82.1) | 11.1 | 77.4 | 98.0 | 0.000 | 0.990 |
 Yes | 108(17.9) | 12.0 | 78.7 | 97.2 | ||
The severity of clinical outcome | ||||||
 Asymptomatic | 24(4.0) | 54.2 | 95.8 | 100 | 30.425 | 0.000* |
 Mild | 399(66.2) | 9.8 | 78.4 | 98.7 | ||
 Moderate | 179(29.7) | 8.9 | 73.7 | 96.6 | ||
 Severe | 1(0.2) | 0 | 0 | 0 | ||
Fever | ||||||
 No | 77(12.8) | 37.8 | 84.4 | 98.7 | 14.963 | 0.000* |
 Yes | 526(87.2) | 7.4 | 76.6 | 97.9 | ||
Cough | ||||||
 No | 282(46.8) | 13.8 | 75.9 | 97.5 | 1.199 | 0.549 |
 Non-productive cough | 215(35.7) | 6.5 | 81.4 | 99.1 | ||
 Productive cough | 106(17.6) | 14.2 | 74.5 | 97.2 | ||
Sore throat | ||||||
 No | 554(91.9) | 10.8 | 76.4 | 98.0 | .215 | 0.022* |
 Yes | 49(8.1) | 16.3 | 91.8 | 98.0 | ||
Rhinobyon | ||||||
 No | 549(91.0) | 11.5 | 78.0 | 98.0 | 0.301 | 0.583 |
 Yes | 54(9.0) | 9.3 | 74.1 | 98.1 | ||
Running nose | ||||||
 No | 533(88.4) | 11.8 | 77.9 | 97.9 | 0.648 | 0.421 |
 Yes | 70(11.6) | 7.1 | 75.7 | 98.6 | ||
Appetite | ||||||
 Normal | 510 (84.6) | 12.9 | 66.0 | 98.0 | 3.306 | 0.069 |
 Abnormal | 93 (15.4) | 2.2 | 75.3 | 97.8 | ||
Defecation | ||||||
 Normal | 440(73.0) | 13.0 | 81.6 | 98.6 | 13.271 | 0.000* |
 Abnormal | 163(27.0) | 6.7 | 66.9 | 96.3 | ||
Personal vaccination | ||||||
 Unvaccinated | 522(88.6) | 7.7 | 75.1 | 97.9 | 71.862 | 0.000* |
 1dose | 12(1.5) | 33.3 | 75 | 100 | ||
 2doses | 69(9.9) | 34.8 | 95.7 | 98.6 | ||
Household vaccination rates | ||||||
  ≤ 0.25 | 58(9.6) | 5.2 | 56.9 | 98.3 | 36.019 | 0.000* |
 0.26–0.50 | 230(38.1) | 5.7 | 75.2 | 99.1 | ||
 0.51–0.75 | 219(36.3) | 13.7 | 80.8 | 95.9 | ||
 0.76–1 | 96(15.9) | 22.9 | 88.5 | 100 | ||
Therapy method | ||||||
 Medical observation | 145(24.0) | 13.1 | 76.6 | 98.0 | 0.173 | 0.678 |
 Symptomatic treatment | 458(76.0) | 10.7 | 77.9 | 98.0 | ||
Ct-values of N | ||||||
  < 20 | 74(18.4) | 0 | 75.7 | 97.3 | 4.083 | 0.130 |
 20–30 | 305(50.6) | 5.9 | 77.7 | 98.4 | ||
  > 30 | 224(37.1) | 22.3 | 57.4 | 97.8 | ||
Ct-values of ORFab | ||||||
  < 20 | 68(11.3) | 0 | 77.9 | 97.1 | 4.609 | 0.100 |
 20–30 | 292(48.4) | 5.8 | 76.4 | 98.3 | ||
  > 30 | 243(40.3) | 21.0 | 79.0 | 97.9 | ||