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Table 1 Clinical and paraclinical predictors for alternative findings and no alternative findings in patients evaluated with whole-leg ultrasound for suspected DVT

From: Prevalence and predictors of alternative diagnoses on whole-leg ultrasound negative for acute deep venous thrombosis

 

All patients without DVT (n = 531)

Alternative findings (n = 349)

No alternative findings (n = 182)

P value*

 

n

%*

n

%*

n

%*

 

Females

269

50.7

174

49.9

95

52.2

0.6478

Age in years, median (IQR#)

70 (56–78)

71 (58–78)

66 (52–77)

0.0226

Symptoms

       

 Leg pain

189

35.6

133

38.1

56

30.8

0.1047

 Leg swelling

180

33.9

138

39.5

42

23.1

0.0002

 Circumference difference

116

21.8

89

25.5

27

14.8

0.0055

 Redness

32

6

27

7.7

5

2.7

0.0213

Risk factors

       

 Known coagulopathy

6

1.1

2

0.6

4

2.2

0.1878

 Active cancer

59

11.1

39

11.2

20

11.0

0.9999

 Previous DVT

63

11.9

50

14.3

13

7.1

0.0160

 Wells score, median (interquartile range)

1

(0–2)

[n = 168]

1

(0–2)

[n = 117]

0

(0–2)

[n = 51]

0.3508

Lab

    

 D-Dimer, median

(interquartile range)

1.6

(0.73–3.1)

[n = 319]

1.5

(0.78–2.925)

[n = 204]

1.6

(0.68–3.35)

[n = 115]

0.9119

  1. *P values < 0.05 appear italic
  2. #Interquartile range