Epidemiology of Ventilator-Associated Pneumonia, microbiological diagnostics and the length of antimicrobial treatment in the Polish Intensive Care Units in the years 2013-2015

Table 4 Duration of antibiotic treatment and duration of hospital stay depending on the employed method of taking the material for microbiological diagnostics of VAP, Polish ICUs 2013–2015

	Duration of antibiotic treatment		Length of ICU stay
	PNEU-1^a	Other VAP cases^b	PNEU-1^a	Other VAP cases^b
Average (95% CI) (days)	7 (6,8)	9 (8,10)	49 (29,69)	52 (33,70)
Median	7	8	31	31
Standard deviation	3	4	89	102
Minimum	1	3	11	2
Maximum	15	21	781	744
Pearson’s chi-square	(χ² = 8,35, df = 2, p < 0.05)		(χ² = 114, df = 69, p < 0.001)

ICU Intensive Care Unit, VAP Ventilator-Associated Pneumonia
^aPNEU-1: pneumonia documented by invasive diagnostics, minimally contaminated lower respiratory tract sample with quantitative culture
^bOther VAP cases, documented by: PNEU-2 non-protected sample with quantitative culture; PNEU-3 alternative microbiological criteria; PNEU-4 sputum bacteriology or non-quantitative culture; PNEU-5 no microbiological documentation

ISSN: 1471-2334