Table 1.
Characteristics of patients with and without laboratory-confirmed pertussis
| Characteristics | Laboratory-confirmed pertussis | No laboratory-confirmed pertussis | p- value |
|---|---|---|---|
| Number |
183 |
1132 |
|
| Age mean (range), years |
39.1 (16–77) |
37.6 (16–79) |
0.3189 |
| Male : Female |
73 : 110 |
501 : 631 |
0.2965 |
| Symptom* |
|
|
|
| Paroxysmal cough |
165 (90.1) |
849 (75.0) |
<0.0001 |
| Awakened by cough |
133 (72.6) |
747 (65.9) |
0.0760 |
| Sputum production |
67 (36.6) |
378 (33.3) |
0.4006 |
| Chest pain |
66 (36.0) |
382 (33.7) |
0.5566 |
| Dyspnea |
56 (30.6) |
297 (26.2) |
0.2423 |
| Posttussive vomiting |
46 (25.1) |
228 (20.1) |
0.1407 |
| Posttussive gagging |
90 (49.1) |
259 (22.8) |
<0.0001 |
| Inspiratory whoop |
36 (19.6) |
156 (13.7) |
0.0420 |
| History of fever (≥37.0°C) |
27 (14.7) |
234 (20.6) |
0.0718 |
| Upper respiratory tract infection symptoms before cough |
83 (45.3) |
561 (49.5) |
0.3011 |
| Exposed to cough by family member or work/school colleague* |
97 (53.0) |
273 (24.1) |
<0.0001 |
| Hospitalization* |
1 (0.5) |
10 (0.8) |
>0.9999 |
| Laboratory data |
|
|
|
| WBC mean number ± SD, /mm3 |
6,619 ± 2,815 |
7,034 ± 2,622 |
0.1925 |
| Lymphocyte mean number ± SD, /mm3 | 2,043 ± 892 | 2,211 ± 973 | 0.1244 |
*Data represent the numbers (%) of patients.