*X* = Interval number

*L**x* = Number of cases alive at the beginning of the interval

*D**x* = Number of cases who died during the interval

*U**x* = Number of cases untraced (lost to follow up) during the interval

*W**x* = Number of cases withdrawn alive during the interval

*L***x* = Adjusted number of cases alive during the interval

*P**x* = Observed survival for the interval

*CP**x* = Cumulative observed survival

*P***x* = Expected survival for the interval

*CP***x* = Cumulative expected survival

*R**x* = Relative survival for the interval

*CR**x* = Cumulative relative survival

*SP**x* = Standard error for the observed interval survival

*SCP**x* = Standard error for the observed cumulative survival

*SR**x* = Standard error for the relative interval survival

*SCR**x* = Standard error for the relative cumulative survival