Once again the media (BBC in this case) simply misunderstood what they were writing about. Here’s a better summary https://www.scimex.org/newsfeed/type-2-diabetes-could-be-five-separate-diseases Apparently this paper was looking only at adult-onset diabetes which has traditionally been termed T2 diabetes, and found they could split these into five groups, but not the ones that the BBC reported. If you were diagnosed as a juvenile you are still a T1 and this doesn’t change, and the T1 group can be considered in addition to the ones they talk about that have traditionally been considered T2 (which includes LADA as group 5.):
Adult onset diabetes types:
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The most common form of the disease was one of the more moderate forms of diabetes, which was seen in elderly people and affected 39-47% of patients (cluster 5, or mild age-related diabetes).
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The other mild form of diabetes (cluster 4, or mild obesity-related diabetes) was mainly seen in obese individuals and affected 18-23% of patients.
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Among the severe forms, there was one group with severe insulin resistance and a significantly higher risk of kidney disease than the other types (cluster 3/severe insulin-resistant diabetes, affecting 11-17% of patients)
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Another severe form was a group of relatively young, insulin-deficient individuals with poor metabolic control but no auto-antibodies (cluster 2/severe insulin-deficient diabetes, affecting 9-20%).
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The remaining severe group were insulin-deficient patients who had auto-antibodies associated with autoimmune diabetes (cluster 1/severe autoimmune diabetes, affecting around 6-15%), a form of diabetes formerly called type 1 diabetes, or latent autoimmune diabetes in adults (LADA).