Outcome and complications after intra-arterial thrombolysis for lower limb ischaemia with or without continuous heparin infusion.

1·79 to 4·96; P < 0·001) and preoperative anaemia showed a trend (OR 1·91, 1·16 to 3·16; P = 0·011).

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When this more strict definition of bleeding was used, there was still a numerical trend towards a higher risk in Malmö, but the difference lost statistical significance; a type II statistical error cannot be excluded.

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