|
Variable
|
Sensitivity
|
Specificity
|
|---|
|
Setting for recruitment
|
0.14
|
0.43
|
|
DVT prevalence
|
<0.001
|
0.11
|
|
Proportion of proximal DVT
|
0.04
|
0.14
|
|
Mean age
|
0.36
|
0.17
|
|
Proportion of males
|
0.66
|
0.24
|
|
Consecutive recruitment
|
0.78
|
0.55
|
|
Prospective study
|
0.26
|
0.24
|
|
Radiologist interpreted
|
0.064
|
0.52
|
|
Sonographer interpreted
|
0.52
|
0.44
|
|
Ultrasound performed blind to reference standard
|
0.44
|
0.52
|
|
Reference standard performed blind to ultrasound
|
0.59
|
0.56
|
|
Previous DVT excluded
|
0.92
|
0.039
|
|
Date of publication
|
0.057
|
0.84
|
- p-value when included in random effect weighted meta-regression
