Table 1. An overview of the implemented interventions.

		Site 1	Site 2	Site 3
Technical interventions
Educational activities
	Repeated hands-on training in tracheal suction for physicians		x	x
	Repeated hands-on training in tracheal suction for nurses	x		x
	Repeated hands-on training in sputum induction by nurses		x
Non-technical interventions
Educational activities
	Repeated education of physicians at the relevant departments	x	x	x
	Repeated education of nurses at the relevant departments	x	x	x
	Personal face-to-face feedback to physicians			x
	Personal feedback to physicians via email		x
	Personal feedback to physicians via the feedback option in the health record system			x
Educational material
	Standardised PowerPoint presentations on CAP	x	x	x
	Pocket cards on CAP	x	x	x
	Regular newsletter distribution	x	x	x
	Posters on guideline-based CAP treatment at the departments		x
Process improvements
	Authorising triage nurses to order X-rays		x
	Authorising triage nurses to order LRTS	x	x
	MCS and PCR for atypical bacteria analysed using the same LRTS	x	x
	CURB-65 as a standard phrase in the EHRS	x	x	x
	Order sets for CAP in the EHRS	x	x	x

Abbreviations: CAP: community-acquired pneumonia; LRTS: lower respiratory tract sample; MCS: microscopy, culture, sensitivity; PCR: polymerase chain reaction; EHRS: electronic health record system.