Prevention of peripherally inserted central line-associated blood stream infections in very low-birth-weight infants by using a central line bundle guideline with a standard checklist: a case control study

Table 2 Comparison of CRI and the indwelling catheter days (\( \overline{x}\pm s \))

Group	Total catheter days (d)	Cases of CRI cases	CRI infection rate	Indwelling Catheter days
Group	Total catheter days (d)	Cases of CRI cases	(/1000 indwelling catheter days)	Indwelling Catheter days
Control (n = 53)	1299	13	10.0	24.8 ± 7.4
CLB (n = 57)	1819	4	2.2	31.9 ± 15.0
x²/t′			8.522	3.326^a
P			0.004	0.001

^aPopulation variance heterogeneity of indwelling time adopted correction of t test

ISSN: 1471-2431