The cost effectiveness of ligament reconstruction for acute anterior crucia
te ligament tears in young adults was compared with the cost effectiveness
of nonoperative management. A decision tree was constructed to predict the
expected functional outcomes for operative and nonoperative treatment, Outc
ome probabilities were derived from the surgical and natural history litera
ture. Cost data were based on averaged figures from the senior author's ins
titution, Utility values were determined from a questionnaire administered
to 285 local university students. Cost effectiveness was calculated in term
s of dollars spent per additional quality adjusted life year provided by th
e surgical reconstruction for the initial 7 years after an injury, The oper
ative strategy provided 5.10 quality adjusted life years versus 3.49 years
for nonoperative treatment, yielding a marginal effectiveness of 1.61 quali
ty adjusted life years. The estimated total costs of the operative and nono
perative strategies were $11,768 and $2333, respectively, for a marginal co
st of $9435, The resulting marginal cost effectiveness ratio was $5857 per
quality adjusted life year. These data suggest that, when based on function
al outcomes, anterior cruciate ligament reconstruction is a cost effective
method of treatment For acute tears in young adults. The cost effectiveness
ratio predicted compares favorably with those of other health care interve
ntions that aim to improve quality of life.