Table 2 Comparison of single infections with different numbers of co-infections
Single pertussis infection | One co-infection | Two and more co-infection | P value | |
|---|---|---|---|---|
121 (40.07%) | 134 (44.37%) | 47 (15.56%) | ||
Age of onset (day), median (IQR) | 81 (13, 293) | 74 (14, 353) | 78 (22, 340) | 0.805 |
Hospital length of stay, median (IQR) | 7 (1, 24) | 7.5 (1, 31) | 10 (3, 32) | 0.001 |
Gender (female, n, %) | 52 (42.98%) | 55 (41.04%) | 23 (48.94%) | 0.643 |
Pertussis Toxin IgG antibodies, IU/ml, median (IQR) | 0.98 (0.00, 170.64) | 3.83 (0.00, 219.76) | 2.93 (0.00, 167.43) | 0.894 |
WBC count, highest cells×103/µL, median (IQR) | 16.75 (6.16, 59.5) | 14.12 (4.44, 93.52) | 16.68 (7.39, 50.51) | 0.699 |
Lymphocyte count, highest cells×103/µL, median (IQR) | 12.48 (2.64, 42.25) | 10.03 (3.15, 43.95) | 12.4 (2.22, 37.8) | 0.172 |
Raised C-reactive protein (n, %) | 1 (0.83%) | 13 (9.70%) | 2 (4.26%) | / |
Raised Procalcitonin (n, %), >0.5 ng/ml | 1 (0.83%) | 6 (4.48%) | 3 (6.38%) | / |
Highest respiratory rate (breaths/min) | 42 (21, 68) | 41 (30, 70) | 42 (31, 68) | 0.117 |
Highest heart rate (beats/min) | 131 (105, 198) | 130 (112, 168) | 130 (118, 163) | 0.570 |
Pneumonia (n, %) | 91 (75.21%) | 101 (75.37%) | 41 (87.23%) | 0.201 |
Severe Pneumonia (n, %) | 5 (4.13%) | 17 (12.69%) | 7 (14.89%) | 0.028 |
Respiratory failure (n, %) | 5 (4.13%) | 15 (11.19%) | 7 (14.89%) | 0.042 |