Period | Entry Date | |||
1983 | 1988 | 1993 | All | |
1983/88 | 101/612 | 101/612 | ||
1988/93 | 74/502 | 37/272 | 111/774 | |
1993/98 | 51/413 | 30/220 | 17/190 | 98/823# |
The denominator is the number of subjects in whom outcome was known
#: Excludes two subjects who were lost to follow up in 1993 but were subsequently known to have died between 1993–1998