Table. Completeness of pertussis surveillance data collected from the NNDSS and EPS, United States, 2011–2012*.

Characteristic	Complete, %†		Difference, %
	NNDSS‡	EPS
Race	76	91	15
Ethnicity	72	93	11
Any cough	79	100	21
Paroxysms	78	100	22
Whoop	74	97	23
Post-tussive vomiting	75	99	24
Primary symptoms known§	72	96	24
Cough onset date	66	100	34
Duration of cough	71	100	29
Hospitalized	73	99	26
≥1 vaccine date and type, age range 3 mo–7 y	71	99	28

*Data were obtained from Kamiya et al. (7). NNDSS, National Notifiable Disease Surveillance System; EPS, Enhanced Pertussis Surveillance. All p values for comparisons were <0.0001.
†Unknown or missing responses were considered incomplete.
‡NNDSS completeness calculation excludes data from EPS area.
§Cough, paroxysms, whoop, and post-tussive vomiting