Supplementary Table 1.

Villalta score for the assessment of PTS.

Venous symptoms	Signs
Pain	Pretibial edema
Cramps	Skin induration
Heaviness	Hyperpigmentation
Paraesthesia	Pain on calf compression
Itching	Venous ectasia
	Redness

Scoring: Each sign or symptom is rated as 0 (none), 1 (mild), 2 (moderate), or 3 (severe), and total scores are summed. Total score less than 5 excludes PTS; a score of 5–14 indicates mild or moderate PTS; a score greater than 15 or venous ulcer indicates severe PTS.