# Years on Originator IFX	# Patients	# Retained 12 months later (%)	OR (vs. 1 year on Originator IFX)	CI (95%)	P value
1	1,822	1,338 (73.4%)
2	1,102	898 (81.5%)	1.5923	1.3245–1.9143	<0.0001
3	721	610 (84.6%)	1.9879	1.5836–2.4955	<0.0001
4	465	396 (85.2%)	2.0760	1.5753–2.7359	<0.0001
5	248	204 (82.3%)	1.6771	1.1914–2.3609	0.0030