Ethnic differences in gestational oral glucose screening in a large US population

Area of Science:

• Obstetrics and Gynecology
• Endocrinology
• Public Health

Background:

• Gestational diabetes mellitus (GDM) affects maternal and infant health.
• Prevalence and risk factors for GDM vary significantly across diverse populations.
• Understanding ethnic disparities in GDM is crucial for targeted interventions.

Purpose of the Study:

• To determine the prevalence of GDM and hyperglycemia in a large, multi-ethnic population in Hawaii.
• To analyze differences in glucose metabolism based on maternal age and ethnicity.
• To identify ethnic variations in GDM screening and diagnosis.

Main Methods:

• Utilized electronic medical records from Kaiser Permanente Hawaii (1995-2003) for singleton births.
• Linked birth certificate ethnicity data with laboratory screening results.
• Employed the 50-g, 1-hour glucose challenge test (GCT) and 100-g, 3-hour oral glucose tolerance test (OGTT) for GDM screening, using NDDG and C&C criteria.

Main Results:

• 21% of 21,130 women screened had elevated glucose (>140 mg/dL) on the 1-hour GCT, with highest rates in Filipinos and Chinese.
• Age-adjusted GDM prevalence was 4.4% (NDDG) and 6.6% (C&C).
• Koreans (6.2%) and Filipinos (6.1%) showed the highest GDM rates (NDDG criteria), while African Americans (1.5%) and Caucasians (2.5%) had the lowest.

Conclusions:

• This population-based study reveals significant ethnic variations in GDM prevalence in Hawaii.
• Findings underscore the necessity for further research into maternal-child outcomes and potential ethnic-specific GDM diagnostic guidelines.
• The diverse rates emphasize the importance of culturally sensitive approaches to GDM management.