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Table 7 Population summary for programme planning based on prevalence and incidence data from a Kenyan cohort over 50 years of age

From: The incidence of diabetes mellitus and diabetic retinopathy in a population-based cohort study of people age 50 years and over in Nakuru, Kenya

Population at risk

 Place

Nakuru County

Kenya (National)

 Total Population

1.6 Million

46 Million

 Population 50 years and over

0.15 Million

4.3 Million

Diabetes Mellitus (DM)

 Prevalence (%) of DM

6.5

 Number of people over 50 with DM (needing examination of the retina every 1–2 years)

26,100

279,500

 Awareness of DM within the population over 50 (%)

85

 Number of people over 50 with known DM

22,185

237,575

 Number over 50 who develop new DM per 1000 of population per year

11/1000

 Number over 50 who develop new DM per sample population per year

1650

47,300

Diabetic Retinopathy (DR)

 Proportion (%) of people over 50 with DM who have DR

35.9

 Number of people over 50 with DR

9400

100,340

 Number over 50 who develop new DR per 1000 of population per year

3/1000

 Number over 50 who develop new DR of the sample population per year

450

12,900

Vision Threatening Diabetic Retinopathy (VTDR)

 Proportion of people over 50 with DM who have VTDR

13.4

 Number of people over 50 with VTDR (needing treatment)

1260

13,450

 Number over 50 who develop new VTDR per 1000 of population per year

1.6/1000

 Number over 50 who develop new VTDR of the sample population per year

240

6880

  1. Further research needs to be done to assess gaps in the patient care pathway which include:
  2. • awareness of DM in the population;
  3. • access / availability to relevant diagnostic and treatment services ;
  4. • quality of diagnostic and treatment services;
  5. • availability of screening for DR within diabetes and eye care;
  6. • protocols and referral thresholds for people with or without DR;
  7. • barriers to receiving treatment for STDR in those with known STDR