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During Know your Numbers! Week 2009:
Across the UK, only 22% of people tested had an 'optimal' reading. This means 78% of those tested should be taking positive action to lower their blood pressure.
34% had high blood pressure readings (at least 140/90mmHg) which needed further investigation. 71% did not know their blood pressure numbers.
Even 'average' readings across England, Wales and Northern Ireland fell into the 'high normal' definition (130/85 - 139/89mmHg). This has serious implications for the future health of the population. For example, someone with a BP of 135/85mmHg is twice as likely to have a stroke or develop heart disease as someone with an optimal BP.
The results from North Wales are as follows:
| Area | No. of readings returned | % High reading | % High normal reading | % Unaware of bp numbers | Mean systolic | Mean diastolic |
| Wales | 4,080 | 39 | 23 | 134 | 81 | |
| Clwyd | ||||||
| Denbighshire | 37 | 43 | 14 | 135 | 80 | |
| Gwynedd | ||||||
| Wrexham | 40 | 40 | 17.5 | 135 | 80 |
