TABLE 1.
Characteristics of the studied population according to age and positivity to pertussis laboratory analysis
| Characteristic | Data for group no. (age range): |
|||||
|---|---|---|---|---|---|---|
| 1 (<1 yr) |
2 (1–6 yr) |
3 (≥7 yr) |
||||
| Total (n = 260) | Pertussis positive (n = 101)a | Total (n = 81) | Pertussis positive (n = 31)a | Total (n = 162) | Pertussis positive (n = 94)a | |
| Age (mean [range])b | 3 (1–11) | 2.7 (1–8) | 3 (1–6) | 3 (1–6) | 26 (7–88) | 24 (7–74) |
| Gender (n [%] female) | 153 (59) | 63 (62.4) | 48 (59.3) | 19 (61.3) | 105 (64.8) | 56 (59.6) |
| Time since cough onset | ||||||
| Mean (SD) (days) | 16 (10) | 17 (10.4) | 24 (17.8) | 26 (18) | 26 (19) | 30 (18.5) |
| Range (days) | 7–63 | 7–50 | 7–93 | 7–78 | 7–98 | 7–93 |
a
Positive by at least one test.
b
Ages given for group 1 are in months and for groups 2 and 3 are in years.