66,000 adults & children in NI with diabetes

Estimates of ca 12,500 people who are as yet unaware that they have the condition

Damage to small blood vesselsVessels may become blocked or

leakyNew vessels may grow, and these

may bleed easilyMajor cause of blindness in working

population

Condition should be an important health problem

Should be treatable Facilities for diagnosis and Tx should be

available Test should be acceptable to population Natural history of the disease should be

understood Should be an agreed policy on who to

treat

Case finding should be continuousTotal cost of finding a disease should

be balanced in relation to medical expenditure as a whole

“Screening is the process of identifying those individuals at a signifigantly high risk of a specific disorder to warrant further investigation or direct action”

...”is normally asymptomatic , usually medically initiated and not requested by the patient...”

Sensitivity: proportion of people WITH the disorder who test positive on a screening test

Specificity: proportion of people who do NOT have the disorder who test negative...

Priorities for Action

By 2007, Boards & Trusts expected to have in place a programme of diabetic retinopathy screening to cover the whole of Northern Ireland

To reduce visual morbidity caused by diabetic retinopathy by facilitating early diagnosis & treatment of sight-threatening retinopathy through population screening...

Annual retinal screening should be offered to all eligible individuals with diabetes

Screening should be carried out by digital retinal photography

Those identified as having potentially sight-threatening should have rapid access to specialist assessment & treatment

Screening is a programme to reduce the risk of disease

It is not a guarantee of diagnosis or cure

It includes:

Identification of the population to be screened

Public & professional awareness Written information Training of health professionals Offer & application of screening test Appropriate follow-up of positive

screens Feedback Standards & QA

Most patients with diabetes are eligible for screening, apart from...

<12 years old Informed choice to

opt out NPL in either eye Are registered blind

or PS due to diabetes Are terminally ill or

to infirm to participate

Physical or mental disability

Currently under the care of ophthalmologist for DR

CAPTURE OF DIGITAL IMAGES

Although the model of delivery varies by geographical location, all operate to agreed Regional QA Standards & are subject to performance monitoring

There is a regional Call/Recall system for primary care practices for the screening programme. DRSS initiates contact & offers GP practices screening visits on a rolling cycle. Within this cycle, screening is offered according to clinical risk criteria.

Two or more photographs are taken of the back of the eye

Images are assigned & digitally stored

Transferred to DRSS offices for interpretation, analysis & information sharing.

Images & details are stored for at least 8 years

This is useful to track changes over time & also to monitor the quality of the screening programme.

If DR is detected, referral to eye clinic for further assessment is indicated.

Otherwise, screening is invited again in 12/12

DemographicsEpidemiologyResourcesMaintenance of competencies

Information sharing...