Type 2 & other diabetes

Hyperosmolar hyperglycaemic state: a systematic review and meta-analysis

BMJ Open Diabetes Res CarePublished Systematic review and meta-analysis

Authors' conclusion

HHS presents with similar biochemistry globally, but outcomes vary significantly.

Study context

Population
Reported hyperosmolar hyperglycaemic state (HHS) cases, database inception to February 2025
Participants
63,935 cases27 studies
Outcome
Precipitants and outcomes of HHS
Methodological detailsPRISMA guidelines
  • PRISMA guidelines

Pooled result

As reported in the abstract

Precipitant: non-infective illness
49.5%
Precipitant: infection
44.0%
Precipitant: new diabetes diagnosis
31.7%
ICU admission
40.8%
Median hospital stay
7.5 days
Overall mortality
21.1%

Further pooled results

Median age

Median age (IQR 56.1-72.0)
63.8 years

Regional variation

ICU admission, North America (highest)
70.0%
Hospital stay, Asia (longest)
17.5 days
Hospital stay, North and South America (shortest)
4.0 days
Mortality, Africa (highest)
40.0%
Mortality, Asia
18.2%
Mortality, North America (lowest)
4.8%

Safety

Complications

Acute kidney injury
7.6%
Pulmonary oedema
4.8%
Acute coronary syndrome
3.9%

Original publication

Hyperosmolar hyperglycaemic state: a systematic review and meta-analysis. BMJ Open Diabetes Res Care. Published 29 June 2026. doi:10.1136/bmjdrc-2025-005765

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