Table 1. Characteristics of primary cases of pertussis with household contacts, Catalonia and Navarre, Spain, 2012–13 (n = 688).

Characteristic of primary case	Number	%
Sex
Male	325	47.2
Female	363	52.8
Age in years
< 1	151	21.9
1	24	3.5
2–3	44	6.4
4–6	76	11.0
7–10	149	21.7
11–18	98	14.2
19–40	76	11.0
> 40	70	10.2
Clinical symptoms
Cough lasting > 2 weeks	644	93.6
Paroxysmal cough	581	84.4
Post-tussive vomiting	276	40.1
Inspiratory stridor	259	37.6
Apnoea	151	21.9
Fever	74	10.8
Laboratory confirmation (PCR and/or culture)
Yes	504	73.3
No	184	26.7
Hospitalisation
Yes	105	15.3
No	583	84.7
Vaccination statusa
Fully vaccinated	331	48.1
Undervaccinated due to age	90	13.1
Undervaccinated	15	2.2
Unvaccinated	61	8.9
Unvaccinated due to age	66	9.6
Unknown/no answer	125	18.2

^a Vaccination status was categorised as fully vaccinated (≥ 4 doses of vaccine), undervaccinated (< 4 doses), unvaccinated (no dose), undervaccinated due to age (< 4 doses) and unvaccinated due to age (no dose).