Effect of mailed outreach invitation for a 75 g oral glucose tolerance test in women with previous gestational diabetes

Effect of mailed outreach invitation for a 75 g oral glucose tolerance test in women with previous gestational diabetes - Effect of mailed outreach invitation for a 75 g oral glucose tolerance test in women with previous gestational diabetes

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000037997

Enrollment

Registered

2020-01-01

Start date

2019-09-24

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Gestational diabetes

Interventions

Mail a letter for outreach invitation to women with a history of gestational diabetes and perform a 75 g OGTT to the applicants.

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: Inclusion criteria: 1. Women with a history of GDM who underwent glycemic control during the pregnancy in our hospital 2. Normal glucose tolerance was confirmed by a 75 g OGTT at 3 months after delivery 3. More than one year after delivery 4. No appointment for the next visit

Exclusion criteria

Exclusion criteria: Exclusion criteria: 1. Chronic or severe illnesses that the investigator judges to be difficult to perform 2. During pregnancy 3. Having already been diagnosed with diabetes

Design outcomes

Primary

Measure	Time frame
Proportion of women achieving a 75 g OGTT	—

Secondary

Measure	Time frame
1. Proportion of a 75 g OGTT abnormal (Borderline type or diabetic type). 75gOGTT results are based on diabetes diagnostic criteria, (i) Diabetic type: fasting plasma glucose level of more than 126 mg/dl or 2-h value of more than 200 mg/dl in 75gOGTT. (ii)Normal type; fasting plasma glucose level of<110 mg/dl and 2-h value of<140mg/dl in OGTT. (iii) Borderline type (neither diabetic nor normal type); falling between the diabetic and normal values. 2.Comparison of AUC-glucose, AUC-IRI, HOMA-IR, and Insulinogenic index during the OGTT calculated at 3 months after delivery.	—

Measure

Time frame

1. Proportion of a 75 g OGTT abnormal (Borderline type or diabetic type). 75gOGTT results are based on diabetes diagnostic criteria, (i) Diabetic type: fasting plasma glucose level of more than 126 mg/dl or 2-h value of more than 200 mg/dl in 75gOGTT. (ii)Normal type; fasting plasma glucose level of<110 mg/dl and 2-h value of<140mg/dl in OGTT. (iii) Borderline type (neither diabetic nor normal type); falling between the diabetic and normal values. 2.Comparison of AUC-glucose, AUC-IRI, HOMA-IR, and Insulinogenic index during the OGTT calculated at 3 months after delivery.

—

Countries

Japan

Contacts

Public ContactKana Igarashi

St.Marianna University School of Medicine Division of Metabolism and Endocrinology,Department of Internal Medicine

k2igarashi@marianna-u.ac.jp0449778111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026