Table 2.
Comparison of characteristics between LTT_N positive and negative cases in infected health care workers.
| Parameters | LTT_N positive (n = 49) | LTT_N negative (n = 5) | P value |
|---|---|---|---|
| Age (years) | 50.0 (37.0, 60.0) | 31.0 (26.5, 49.5) | 0.092 |
| Gender (M/F) | 19/30 | 2/3 | 0.958 |
| BMI | 24.8 (23.1, 29.2) | 21.5 (20.7, 35.6) | 0.622 |
| Diabetes (yes/no) | 7/42 | 0/5 | 0.369 |
| Hypertension (yes/no | 20/29 | 1/4 | 0.368 |
| COPD (yes/no) | 2/47 | 0/5 | 0.648 |
| Asthma (yes/no) | 7/41 | 0/5 | 0.364 |
| Smoking (yes/no) | 2/47 | 0/5 | 0.648 |
| SARS-CoV-2 IgG-Ab (S1) (BAU/ml) | 129.0 (71.9, 553.5) | 26.2 (16.2, 35.6) | 0.002 |
| SARS surrogate neutralization test (%) | 63.0 (45.0, 90.0) | 26.0 (15.5, 29.5) | 0.001 |
| T-cell responses to SARS-CoV-2 Spike-N-Term (SI) | 6.5 (4.1, 13.3) | 1.4 (1.2, 1.7) | <0.001 |
| T-cell responses to SARS-CoV-2 Spike-C-Term (SI) | 5.1 (3.3, 9.8) | 1.5 (1.4, 2.0) | 0.001 |
| Time from infection to blood collection in days | 201 (131, 432) | 200 (176, 398) | 0.637 |
Continuous variables are given as median (interquartile range) or numbers. Body mass index (BMI) was calculated as weight in kilograms divided by height in meters squared. COPD, chronic obstructive pulmonary disease.