Table 2. Baseline characteristics of study participants (N = 458).

	n (%)
PCR confirmed cases	32 (7.0)
Lymphocytosis	135 (29.5)
Age group
0–3 months	132 (28.8)
4 months– 9 years	372 (71.2)
Sex
Female	200 (43.7)
Pertussis vaccine doses
0	28 (6.1)
1	57 (12.4)
2	58 (12.6)
≥ 3	308 (67.2)
Unknown	7 (1.5)
HIV status
Infected	19 (4.1)
Exposed uninfected	92 (20.1)
Nutritional status
Moderate-severe malnutrition#	45 (9.8)
Macrolide/cotrimoxazole in preceding week	5 (1.1)

PCR = polymerase chain reaction, # As per World Health Organization criteria of weight for age Z score less than -2