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140
120
100
80
60
40
20
0
50
100
150
200
SBP mmHg
Fig. 2. Regions presumably corresponding to Table 1
140
120
100
80
60
40
20
0
50
100
150
200
SBP mmHg
Fig. 3. Prehypertension region, as defined in Table 1
Nevertheless, although a computer language needs correct specifications, these
inaccuracies are overcome by practitioners (due to their implicit knowledge).
4
CVD Risk Classification
In [8], when hypertension is present, and partially following [7, 9], Table 5 is
proposed for classifying the CVD risk (CVDRF stands for CVD Risk Factors,
apart from hypertension; and TOD, DM and ACA were introduced in Section
2.1).
Again, this is a pseudo-classification, as, for instance, “Stage 2a Hyperten-
sion”
“ACA” would also lead to a double: “Medium CDV risk”
and “Very High CDV risk”.
In our opinion the three first rows should include that there are no ACA and
the two first rows should also include that the patient doesn't suffer from DM
and there is no TOD. Again, these inaccuracies are overcome by practitioners
(due to their implicit knowledge), but we have precised these details in our
adapted table (Table 6). We shall represent by nCVDRF the number of CVDRF
(hypertension is excluded).
Moreover, as this is going to be a first step of a deduction process, two
columns (corresponding to Normal BP and Prehypertension) have been added
in the left hand side of the new Table 6, so that we can forward fire all cases.
From the medical point of view, these two new columns have no interest, as Table
5 was a classification of CVD Risk when hypertension was present. Specifically,
“0 CVDRF”
 
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