Table:
Variables	Definition	Numerator	Denominator
Retention	All patients who are not registered as deceased or LTFU for any reason	Number of patients alive and on ART	Number of patients alive and on ART plus death plus LTFU
Loss to follow-up	Patients who miss scheduled visits to the clinic for more than three months after the last visit	Not applicable (NA)	NA
Transfer out	It refers to the official transfer of the patient to another clinic	NA	NA
Transfer in	It refers to the official transfer of the patient from another clinic	NA	NA
Cumulative retention	The total retention by the end of the calendar among patients ever started on ART	Number of patients alive and on ART by the end of the calendar	The total number of patients ever started on ART
Current retention	The retention rate during a specific “calendar” among patients who were on ART sometime during the “calendar”	Number of patients alive and on ART by the end of the “calendar”	Number of patients alive and on ART by the end of the calendar plus number of patients who died plus LTFU during the “calendar”
Calendar	The time during which the level of the “current retention” is estimated	NA	NA

Express the figure as Markdown code.

| Variables | Definition | Numerator | Denominator | 
 | --- | --- | --- | --- | 
 | Retention | All patients who are not registered as deceased or LTFU for any reason | Number of patients alive and on ART | Number of patients alive and on ART plus death plus LTFU | 
 | Loss to follow-up | Patients who miss scheduled visits to the clinic for more than three months after the last visit | Not applicable (NA) | NA | 
 | Transfer out | It refers to the official transfer of the patient to another clinic | NA | NA | 
 | Transfer in | It refers to the official transfer of the patient from another clinic | NA | NA | 
 | Cumulative retention | The total retention by the end of the calendar among patients ever started on ART | Number of patients alive and on ART by the end of the calendar | The total number of patients ever started on ART | 
 | Current retention | The retention rate during a specific “calendar” among patients who were on ART sometime during the “calendar” | Number of patients alive and on ART by the end of the “calendar” | Number of patients alive and on ART by the end of the calendar plus number of patients who died plus LTFU during the “calendar” | 
 | Calendar | The time during which the level of the “current retention” is estimated | NA | NA |