New Zealand Cardiovascular Risk Charts

New Zealand Cardiovascular Risk Charts

Risk level women

Risk level men

No diabetes

Diabetes

No diabetes

Diabetes

Non-smoker

Smoker

Non-smoker

Smoker

Non-smoker

Smoker

Non-smoker

Smoker

4

5

6

7 8

4 5

6

7

8

4

5

6

7 8

4 5

6

7

8

4

5

6

7

8

4

5

6

7

8

4

5

6

7 8

4 5

6

7

8

180

180

180

180

Age

Age

160

160

160

160

65–74

65–74

140

140

140

140

120

120

120

120

180

180

180

180

Age

Age

160

160

160

160

55–64

55–64

140

140

140

140

120

120

120

120

180

180

180

180

Age

Age

160

160

160

160

45–54

45–54

140

140

140

140

120

120

120

120

180

180

180

180

Age

Age

160

160

160

160

35–44

35–44

140

140

140

140

120

120

120

120

4

5

6

7 8

4 5

6

7

8

4

5

6

7 8

4 5

6

7

8

4

5

6

7

8

4

5

6

7

8

4

5

6

7 8

4 5

6

7

8

Total cholesterol:HDL ratio

Total cholesterol:HDL ratio

Total cholesterol:HDL ratio

Total cholesterol:HDL ratio

Using the Charts

Key

Benefits: NNT for 5 years to prevent one event (CVD events prevented per 100 people treated for 5 years)

Risk level:

5-year CVD risk

5-year cardiovascular

•

Identify the chart relating to the person’s sex, diabetic status, smoking history and age.

1 intervention

2 interventions

3 interventions

(fatal and non-fatal)

(25% risk reduction)

(45% risk reduction)

(55% risk reduction)

disease (CVD) risk

•

Within the chart choose the cell nearest to the person’s age, systolic blood pressure (SBP)

(fatal and non-fatal)

30%

13 (7.5 per 100)

7 (14 per 100)

6 (16 per 100)

and total cholesterol (TC) TC:HDL ratio. People who fall exactly on a threshold between

20%

20 (5 per 100)

11 (9 per 100)

9 (11 per 100)

cells are placed in the cell indicating higher risk.

>30%

15%

27 (4 per 100)

15 (7 per 100)

12 (8 per 100)

Note: The risk charts now include values for SBP alone, as this is the most informative

Very high

25–30%

10%

40 (2.5 per 100)

22 (4.5 per 100)

18 (5.5 per 100)

of conventionally measured blood pressure parameters for cardiovascular risk.

5%

80 (1.25 per 100)

44 (2.25 per 100)

36 (3 per 100)

20–25%

Diastolic pressures may add some predictive power, especially at younger ages

(eg, a diastolic pressure consistently >100 mm Hg in a patient with SBP values

NNT = Number needed to treat

High

between 140 and 170 mm Hg).

15–20%

Based on the conservative estimate that each intervention: aspirin, BP treatment (lowering SBP by 10 mm Hg) or lipid modification (lowering LDL-C by 20%)

reduces cardiovascular risk by about 25% over 5 years.

Moderate

10–15%

Note: Cardiovascular events are defined as myocardial infarction, new angina, ischaemic stroke, transient ischaemic attack (TIA), peripheral vascular

Certain groups may have CVD risk underestimated using these charts.

disease, congestive heart failure and cardiovascular-related death.

5–10%

See Cardiovascular Guidelines Handbook (2009 Edition) for details.

Mild

2.5–5%

<2.5%

Source: New Zealand Guidelines Group. New Zealand Cardiovascular Guidelines Handbook: A summary resource for primary care practitioners. 2nd ed. Wellington: New Zealand Guidelines Group; 2009.