Outcomes of antiretroviral treatment program in Ethiopia: Retention of patients in care is a major challenge and varies across health facilities

Table 1 Outcomes of patients on ART in 55 health facilities in Ethiopia between September 2006 and August 2008

Duration of cohort	Patients in the cohort (a)	Transferred in during the cohort (b)*	Transferred out during the cohort (c)	Active cohort (d = a+b-c)	Second-line ART during the cohort ((e) = e/d)(%)**	Died during the cohort ((f) = f/d) (%)	Loss to follow-up during the cohort ((g) = g/d) (%)	Alive and on ART at the end of the cohort (h)
6 months	38,061	1,709	2,304 (6%)	37,466	125 (0.33%)	1,897 (5%)	5,676 (15%)	29,893 (80%)
12 months	27,668	1,904	2,511 (9%)	27,061	158 (0.58%)	1,716 (6%)	5,266 (19%)	20,079 (74%)
24 months	7,519	814	882 (12%)	7,451	159 (2.13%)	619 (8%)	1,763 (24%)	5,069 (68%)

*The duration on ART of patients transferred in is calculated from the date they started ART irrespective of where they started the treatment.
**Column e is not mutually exclusive from columns f, g and h; while columns f, g and h are mutually exclusive. Patients who shifted to second-line ART during the 6 months cohort were counted as patients on second-line ART in the 12 and 24 months cohort if they were alive and on ART after 12 and 24 months on ART. Moreover, patients on second-line ART during the 12 months cohort were also counted as patients on second-line ART in the 24 months cohort if they were alive and on ART after 24 months on ART.

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