Background: ''The Class of 1989'' is a longitudinal study of 1722 peop
le who were awarded an MD degree by a Canadian university in 1989. Thi
s paper reports on the details of their post-MD training up to spring
1996. Methods: Several medical professional and educational associatio
ns in Canada and the United States provided year-by-year information o
n field and location of post-MD training, certification achieved, whet
her in practice and location of practice through to spring 1996. Infor
mation from all sources was linked to a list of 1989 medical school gr
aduates. Results: Of the 1722 graduates 57 (3.3%) never entered post-M
D training in Canada; 147 (8.5%) did 1 or more years of training in th
e United States. A total of 222 graduates (12.9%) took a break of at l
east 1 year from training, and 301 (17.5%) changed their choice of fie
ld or specialty after starting training. Substantial numbers took 1 or
more years longer to complete training than would be expected based o
n the prescribed length of the training program chosen. The field or s
pecialty choices of the cohort produced a generalist:specialist ratio
of 58:42. The final numbers in several fields depended heavily on trai
nees changing their initial career choice. Interpretation: The data po
int out widely differing and often very long lead times from start to
completion of training. Since 1993, changes to licensure requirements
have reduced opportunities for recent graduating cohorts to delay fina
l career choices, take a break in training, prolong training or change
initial career choices. Rigidities in the post-1993 training environm
ent point to the emergence of a number of serious problems, such as di
ssatisfaction and high anxiety levels among residents, licensing autho
rities being faced with people who have not completed a training progr
am to certification, and insufficient provision of positions for post-
MD training because of underestimates of the time needed to complete t
raining programs. The insights gained from this study lead to the reco
gnition that planning the specialty distribution of the physician work
force is highly complex and difficult.