Table 5. “Cohort retention” for a specific “ART-age group” by the end of a specific “calendar” year ‘Y.’.
| ‘ART-age cohort’ (AN) | Y1 (the least recent year) | Y2 | Y3 | Y4 | Y5 | YN (the most recent year) |
| A1 = <1 year | NA | NA | NA | NA | NA | CoRA1 YN |
| A2 = <2 years | NA | NA | NA | NA | CoRA2 Y5 | CoRA2 YN |
| A3 = <3 years | NA | NA | NA | CoRA3 Y4 | CoRA3 Y5 | CoRA3 YN |
| A4 = <4 years | NA | NA | CoRA4 Y3 | CoRA4 Y4 | CoRA4 Y5 | CoRA4 YN |
| A5 = <5 years | NA | CoRA5 Y2 | CoRA5 Y3 | CoRA5 Y4 | CoRA5 Y5 | CoRA5 YN |
| AN = <N years | CoRAN Y1 | CoRAN Y2 | CoRAN Y3 | CoRAN Y4 | CoRAN Y5 | CoRAN YN |
NA: Not applicable.