Table 4.
Duration of Cough Illness Among Patients With Parapertussis, by Timing of the Initiation of Azithromycin Treatment—Wisconsin, 1 October 2011–31 May 2012
| Initiation of Azithromycin Treatment | |||||
|---|---|---|---|---|---|
| Feature | Nonrecipients (n = 14) | 0–6 d After Cough Onset (n = 74) | 7–13 d After Cough Onset (n = 42) | ≥14 d After Cough Onset (n = 34) | P Valuea |
| Age (yrs), median (IQR) | 5 (4–6) | 5 (3–8) | 5 (3–7) | 5 (3–7) | .996 |
| Duration of cough illness (days), median (IQR) | 19 (14–29) | 10 (8–15) | 16 (14–25) | 26 (24–38) | .002b |
| Hospitalized, n (%) | 0 (0) | 0 (0) | 2 (5) | 0 (0) | … |
Abbreviation: IQR, interquartile range.
a
P-value of Mann–Whitney U test for the difference between initiation of azithromycin treatment 0–6 days after cough onset vs nonrecipients.
b
P-value of Mann–Whitney U test for differences in duration of cough illness by timing of initiation of azithromycin treatment: 0–6 days vs 7–13 days (P <.001); 0–6 days vs ≥14 days (P < .001); 7–13 days vs ≥14 days (P = .001).