Concordance Of Visible And Functional Disease

Figure 3.1 shows the concordance of visible and functional disease in the individual 4422 legs of the 2211 participants for this analysis. The majority of legs showed TSV, but the majority of legs were also functionally normal. If we consider TSV as a "normal" visible finding, visible disease would be defined as VV or TCS, and functional disease as SFD or DFD. The concordance between visible and functional disease was 92%, 17.4% concordant for disease presence and 74.6% concordant for disease absence. Discordance was thus 8%, 4.9% of the legs with visible but not functional disease, and 3.1% with functional but not visible disease. Surprisingly, 21% of all legs with VV were normal functionally (3.7%/17.7%), as were 26% of all legs with TCS (1.2%/4.6%). Thus, although the concordance was strong, visible disease did not invariably mark underlying functional disease, and functional disease was sometimes present in the absence of any visible venous disease.3

CONCORDANCE OF CPVD WITH EDEMA, SVT, AND DVT

Table 3.2 shows edema on examination and SVT and DVT by history, cross-classified by visible and functional disease. Significant differences from the normal/normal

Concordance of CPVD with Edema, SVT, and DVT

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