The association of decision to withhold diagnostic testing with patient outcomes within 3 months.

Odds ratios (95% confidence interval).* Propensity score for the probability of referral for further diagnostic investigations based on the following variables: gender, age, mobility, primary suspicion DVT or PE, duration of symptoms, acute onset, painful leg, swollen leg, previous DVT, previous PE, decubitus, antiplatelet use, estimated probability of VTE by physician, total score on decision rule. There was a moderately to good balances for all variables within the propensity –scores.