Table 1.

Central line-associated bloodstream infection rates in intensive care units^*

Unit type	NNIS system 1992–1999	NHSN system 2013
Medical	6.1†	1.1 (not major teaching) 1.2 (major teaching)
Medical/surgical (major teaching)	6.0	1.1
Medical/surgical (not major teaching)	4.1	0.8
Paediatric	7.9†	0.8 (medical) 1.2 (medical/surgical)
Surgical	5.6†	0.9 (not major teaching) 1.1 (major teaching)

^*Data are from intensive care units reporting to the Centers for Disease Control and Prevention databases: NNIS for 1991–1999 and NHSN for 2013; rate reported is number of infections per 1000 central line days.

^†Stratified data are not available for this time period.

NHSN, National Healthcare Safety Network; NNIS, National Nosocomial Infection Surveillance.