Data from previously published surveys and the current survey that record the unadjusted or age adjusted prevalence of known diabetes (all types) or prevalence of previously undiagnosed diabetes in the UK white population. Prevalence figures (%) refer to all ages unless otherwise stated. Sources used to identify diabetic patients refers to (1) Population survey, (2) Hospital activity analysis, (3) Hospital clinic attendance, (4) General practice lists, (5) Prescription data, (6) Data from retinopathy screening programmes, (7) Laboratory systems. Where diabetes registers were used the sources used to compile the register are listed
| Year | Location | Population surveyed | Unadjusted prevalence | Age adjusted prevalence | Prevalence of undiagnosed cases | Sources used |
|---|---|---|---|---|---|---|
| 1962 | Birmingham (RCGP)10 | 18532 | 0.64 | 0.69 | 1 | |
| 1968 | Edinburgh11 | 468000 | 0.63 | 2–4 | ||
| 1972/4 | Whickham (age over 18)12 | 2779 | 0.8 | 1 | ||
| 1973 | Whitehall (males, 40–64 y)13 | 18403 | 0.9 | 0.3 | 1 | |
| 1982 | Oxford14 | 40079 | 1.08 | 1.04 | 1, 2 | |
| 1983/4 | Poole15 | 90568 | 1.01 | 0.97 | 3–6 | |
| 1984 | Southall (white only)16 | 27075 | 1.20 | 1.05 | 1, 3 | |
| 1985 | Islington (age over 40)17 | 1040 | 2.1 | 2.6 | 1 | |
| (all ages) | 3485 | 1.6 | 1 | |||
| 1987 | Melton Mowbray (over 65)18 | 861 | 6.0 | 3.3 | 1 | |
| 1988 | Powys/Gwent19 | 46400 | 1.01 | 4, 5 | ||
| 1988/9 | Poole20 | 97122 | 1.18 | 1.05 | 3–6 | |
| 1988/9 | Trowbridge21 | 31000 | 1.31 | 1.26 | 2–4 | |
| (age over 65) | 4.6 | 2–4 | ||||
| 1990/2 | Isle of Ely (age 40–65)22 | 1122 | 4.5 | 1 | ||
| 1992 | Manchester23 | 285033 | 1.21 | 4 | ||
| 1992/3 | Bristol24 | 71599 | 1.23–2.14 | 1.31–2.51 | 4 | |
| 1993 | Tunbridge Wells25 | 230000 | 1.18 | 4 | ||
| 1993 | RCGP26 | 353977 | 1.6 | 4 | ||
| 1996 | Poole27 | 256130 | 1.61 | 4 | ||
| 1996 | Poole20 | 86287 | 1.86 | 1.55 | 3–6 | |
| 1996 | Tayside4 | 391274 | 1.94 | 2–7 | ||
| 1996 | Cardiff5 | 386988 | 2.3 | 2–4 | ||
| 1998 | North Wales (all ages) | 418200 | 2.46 | 2.29 | 2–4 | |
| (age over 40) | 201890 | 3.8 | 2–4 | |||
| (age over 65) | 75110 | 7.0 | 2–4 |