T1D Index estimates for 2025 · IDF Europe region · High-Income country
An estimated 355 people are living with type 1 diabetes in Guernsey in 2025. Each year about 10 people are newly diagnosed and 4 people with T1D die. A further 75 people would be alive today had they not died early from type 1 diabetes.
People living with T1D
355
New diagnoses this year
10
Deaths this year
4
Missing people
75
Expected age at death, diagnosed at 10
71.6years
How many people have type 1 diabetes in Guernsey?
355 people in Guernsey are living with type 1 diabetes in 2025, or 550.7 per 100,000 people. That is higher than the Europe average of 298.6 per 100,000 and higher than the global average of 115.5. Guernsey has the 170th-largest number of people living with T1D of the 202 countries in the T1D Index, and the smallest of the 53 countries in the IDF Europe region.
For every 100 people living with T1D in Guernsey, another 21 are missing: people who would be alive today had they not died early from T1D.
Is type 1 diabetes increasing in Guernsey?
The number of people living with T1D in Guernsey went from 186 in 2000 to 355 in 2025, and is projected to rise to 403 by 2040 (+14%).
People living with type 1 diabetes in Guernsey, 2000–2040. Solid line: modelled estimates to 2025; dashed line: projection to 2040.
Type 1 diabetes in Guernsey over time, all ages
Year
Living with T1D
New diagnoses
Deaths
Missing people
2000
186
9
2
54
2010
257
11
3
57
2020
324
9
3
68
2025
355
10
4
75
2030 (projected)
377
10
5
83
2040 (projected)
403
9
5
100
What is the life expectancy with type 1 diabetes in Guernsey?
A 10-year-old diagnosed with type 1 diabetes in Guernsey today is expected to live to 71.6, compared with 84.1 for a 10-year-old without T1D: 12.5 years of life lost. Counting years lived with complications as well, T1D costs 26.4 years of healthy life at today's level of care. If everyone received timely diagnosis, insulin and test strips, and insulin pumps and CGMs, that loss would fall to 13.6 years.
Healthy years of life for a 10-year-old diagnosed with T1D in Guernsey, as each level of care is added in turn
Level of care
Healthy years restored
Healthy years of life
Healthy years still lost
Current level of care
–
57.7
26.4
+ Timely diagnosis for everyone
–
57.7
26.4
+ Insulin and test strips for everyone
+5.6
63.3
20.8
+ Insulin pumps and CGMs for everyone
+7.2
70.5
13.6
How does Guernsey compare?
Type 1 diabetes in Guernsey compared with the Europe region and the world, 2025
2025
Guernsey
Europe
World
People living with T1D per 100,000
550.7
298.6
115.5
New diagnoses per 100,000
14.9
12.1
6.2
Missing people per 100 living with T1D
21.1
30.5
43.0
Expected age at death, 10-year-old with T1D
71.6
62.1
51.3
Expected age at death, 10-year-old in general population
All figures are T1D Index version 3.0 estimates for all ages. Missing people are those who would be alive today had they not died early from type 1 diabetes. Expected age at death is for a 10-year-old. See Data & Methods for how the estimates are made and the peer-reviewed publications behind them.
