Type 2 & other diabetes

Diurnal Cortisol Features and Type 2 Diabetes Risk in Patients With Hypertension and Obstructive Sleep Apnea: A Cohort Study

J Clin Endocrinol MetabPublished Prospective cohort study

Authors' conclusion

Steeper DCS and higher midnight cortisol levels are associated with lower and higher T2D risks in patients with hypertension and OSA, respectively, at least in men or participants with moderate to severe OSA. Diurnal cortisol features may represent an early prevention target for diabetes in this population.

Study context

Population
Patients with hypertension and obstructive sleep apnea (OSA) with cortisol rhythm test at baseline, Urumqi Research on Sleep Apnea and Hypertension cohort196 developed T2D
Participants
1,478 patients
Exposure
Ln-transformed diurnal cortisol features and incident T2D
Outcome
Incident T2D
Follow-up
Median 7.0 years

Main finding

As reported in the abstract

Steep diurnal cortisol slope (DCS), per SD increase: HR (95% CI 0.79-0.97, P = .014); associated with decreased T2D risk

0.88

Midnight cortisol, per SD increase: HR (95% CI 1.08-1.45, P = .003); associated with increased T2D risk

1.25

Observational data: associations, not effects.

Further findings

Sensitivity analyses

Sensitivity analyses showed similar results

Incident T2D in women and in participants with mild OSA

Neither DCS nor midnight cortisol was associated with incident T2D in women or participants with mild OSA

Original publication

Diurnal Cortisol Features and Type 2 Diabetes Risk in Patients With Hypertension and Obstructive Sleep Apnea: A Cohort Study. J Clin Endocrinol Metab. Published 6 April 2023. doi:10.1210/clinem/dgad184

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