Table 2.

Comparison of correlations between clinical variables.

Category	Correlation coefficient (r)	P-value	Correlation strength
Mean SAPS 3 and patient-days using CVC	0.726	<.001*	Strong and positive
Mean SAPS 3 and CVC utilization rate	0.731	<.001*	Strong and positive
Mean SAPS 3 and patient-days using IUC	0.667	<.001†	Moderate and positive
Mean SAPS 3 and IUC utilization rate	0.599	.002†	Moderate and positive

CVC = central venous catheter, IUC = indwelling urinary catheter, SAPS 3 = Simplified Acute Physiology Score 3.

^*Pearson correlation test.

^†Spearman correlation test.