Table 2. Logistic regression analysis of factors predicting fluoroquinolone use.

N = 4,538	Odds ratio (95% CI)* for receipt of fluoroquinolone
Age (y)   18–44   45–64   >65	0.56 (0.48–0.66) 1 1.62 (1.38–1.91)
Year (later year)	1.40 (1.29–1.51)
Healthcare plan   1   2   3   4	1 0.97 (0.77–1.21) 0.80 (0.66–0.97) 1.23 (0.93–1.62)

*CI, confidence interval.