Table 2.

Relationship between the resistance rates of Pseudomonas aeruginosa to carbapenems and either the quantity or diversity of antibiotic consumption for 2006 to 2010

Variable	Results for Spearman's correlation		Results for multiple regression analysis
	coefa	P value	coefb	95% CIc	P value
Global antibiotic use	0.56	0.009d	6.8 × 10−4	−0.003 to 0.005	0.735
Use of carbapenemse	0.63	0.003d
Proportion of very broad-spectrum antibiotics	0.65	0.002d	1.77	0.58 to 2.96	0.006d
Peterson index	−0.52	0.02d	0.07	−0.28 to 0.43	0.658

^aSpearman's correlation coefficient.

^bRegression coefficient.

^cCI, confidence interval.

^dStatistically significant result.

^eCarbapenems included imipenem and meropenem. This variable was not included in the model of the multiple regression analysis.