Table 3. Risk prediction models for PTS... | American Society of Hematology

Table 3.

Risk prediction models for PTS

	SOX-PTS score³⁴	Points	Amin et al³⁵	Points	Méan et al³⁶	Points
Age, y	—		>56	2	≥75	1
BMI, kg/m²	≥35	2	>30	2	—
DVT anatomy	Iliac DVT	1	Iliofemoral DVT	1	Multilevel thrombosis	1
Signs of preexisting venous insufficiency	Baseline Vilalta score		Varicose veins	4	Prior varicose vein surgery	1
	>14 (severe)	2
	10-14 (moderate)	1
					N of leg signs and symptoms*	1 (for each)
Other	—		Smoking	1	Concomitant antiplatelet/NSAID therapy	1
			Female sex	1
			Provoked DVT	1
			History of DVT	1
Risk category	Total score	PTS risk, %	Total score	PTS risk, %	Total score	PTS risk, %
Low	0	6.4	0-2	10	0-3	24.4
	1	13.4
Intermediate	2	16.4	3-4	20	4-5	38.4
	3	25
High	≥4	30	≥5	40	≥6	80.7

	SOX-PTS score³⁴	Points	Amin et al³⁵	Points	Méan et al³⁶	Points
Age, y	—		>56	2	≥75	1
BMI, kg/m²	≥35	2	>30	2	—
DVT anatomy	Iliac DVT	1	Iliofemoral DVT	1	Multilevel thrombosis	1
Signs of preexisting venous insufficiency	Baseline Vilalta score		Varicose veins	4	Prior varicose vein surgery	1
	>14 (severe)	2
	10-14 (moderate)	1
					N of leg signs and symptoms*	1 (for each)
Other	—		Smoking	1	Concomitant antiplatelet/NSAID therapy	1
			Female sex	1
			Provoked DVT	1
			History of DVT	1
Risk category	Total score	PTS risk, %	Total score	PTS risk, %	Total score	PTS risk, %
Low	0	6.4	0-2	10	0-3	24.4
	1	13.4
Intermediate	2	16.4	3-4	20	4-5	38.4
	3	25
High	≥4	30	≥5	40	≥6	80.7

BMI, body mass index; NSAID, nonsteroidal antiinflammatory drug.

Pain, cramps, heaviness, pruritus, paraesthesias, edema, skin induration, hyperpigmentation, venous ectasia, redness, and pain during calf compression.

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