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Compression Class I Mild swelling, tired aching legs, thrombosis prophylaxis, minor varices, post surgery

Compression Class II Primary varices, varices with edema, varices with pregnancy; post-sclerotherapy; post venous ulceration

Compression class III Secondary varices; severe varices with edema; post-phlebitic syndrome; chronic venous insufficiency; phiebitis; thrombophlebitis and edema

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I am sorry, but the provided text does not contain the information required to answer your request. The document is an FDA 510(k) clearance letter for a medical support stocking (Bellavar, Custom Seamless Soft). It confirms the device's substantial equivalence to a predicate device and lists its indications for use.

However, the letter does not include any details about acceptance criteria, device performance studies, sample sizes, expert qualifications, ground truth establishment, or any comparative effectiveness studies. These types of details are typically found in the 510(k) submission itself or in separate study reports, not in the clearance letter from the FDA.

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