Which diabetes subtype common in South Asians?
Data-driven diabetes subtypes show higher risk in South Asians
Researchers analyzed diabetes and prediabetes using data-driven subgroups rather than relying only on the standard clinical categories of type 2 diabetes (T2D) and prediabetes. They found that insulin-deficient forms of diabetes and prediabetes were common among South Asians and were linked to worse outcomes than other subtypes.
The study’s central result is prognostic: insulin-deficient subtypes were associated with higher all-cause mortality and greater cardiovascular mortality. The researchers also report more “excess years of life lost,” a measure that captures how much premature death risk these subtypes confer compared with a reference group.
What’s driving the concern
Conventional definitions of type 2 diabetes and prediabetes may not reflect important biological differences among patients. By identifying subtypes that better match underlying physiology—here, particularly insulin deficiency—the study suggests that some South Asians may be at elevated risk even when their diagnosis falls under the broader, less precise labels.
Why it matters for patients and clinicians
- Risk assessment may need to account for pathophysiological heterogeneity, not just a diagnosis label.
- Subtype-specific care could potentially improve outcomes, especially for cardiovascular risk, which is a major cause of death among people with diabetes.
What remains unclear
The provided story focuses on subtype identification and outcome links, but it does not spell out which treatments are most effective for insulin-deficient subtypes or how quickly these subtypes can be identified in routine clinical settings.
Overall, the findings underscore that “one-size-fits-all” diabetes definitions can obscure meaningful differences in prognosis—an issue with direct relevance for South Asian populations where insulin-deficient patterns appear relatively common.