Due to the scarcity of data regarding nonanticoagulated patients (available only in 8 out of 17 studies), the comparisons between treated and untreated patients did not reach statistical significance.
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Safety and efficacy of anticoagulant treatment in patients with ovarian vein thrombosis: a systematic review and meta-analysis of observational studies.
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Nevertheless, this meta-analysis showed a trend toward a reduction of recurrent VTE in anticoagulated (∼4.2%) vs nonanticoagulated (∼8.7%) OVT patients (RR, 0.70; 95% CI, 0.36-1.37).