. 2011 Feb 11;11:8. doi: 10.1186/1471-2466-11-8

Table 1.

Number of Subjects Evaluated Annually out to 5 Years

	Subjects Completing 1 Year Follow-up in AIR Trial	Subjects Enrolling for Longer-Term Follow-up	Subjects Completing Follow-up

			Year 2	Year 3	Year 4	Year 5
BT	52	45	41^a	41^b	43	42^c
Control	49	24	23^d	21^e	-	-

a: 4 subjects missed visit.

b: 2 subjects missed visit; 1 subject withdrew consent; 1 subject Lost-to-Follow-up.

c: 1 subject missed visit.

d: 1 subject missed visit.

e: 2 subjects withdrew consent after completing Year 2 evaluation, and 1 subject withdrew consent mid-Year 3.

Control group subjects exited from study after completing Year 3 evaluation.