The outcomes assessed were:

the incidence of DVT using enoxaparin,

the incidence of DVT using desirudin,

the probability of detecting DVT,

the probability of death from a detected and treated DVT,

the probability of developing a pulmonary embolism (PE) if a DVT was detected,

the probability of sudden death from a PE,

the probability of detecting a PE,

the probability of death from a detected and treated PE,

the probability of death from a non-detected PE,

the probability of a false-positive diagnosis of a DVT, and

the probability of a false-positive diagnosis of a PE.