Table 6. Subgroup analysis of the relationship between current use of fluoroquinolones and risk of composite gastric or intestinal perforation.

	Patient subgroups	Disease Risk Score adjusted RR (95% Confidence interval)
Fluoroquinolone user v.s. non-user	>70 years of age	1.94 (1.49–2.52)***
	< = 70 years of age	1.88 (1.55–2.29) ***
	Male	1.84 (1.45–2.32) ***
	Female	1.94 (1.57–2.40) ***

*** refers to p<0.001

RR refers to rate ratio.