A recent study from Denmark has found that women who develop gestational diabetes during pregnancy are likely to develop type 2 diabetes nearly 13 years earlier than women without a history of the pregnancy-related condition. The study, led by Dr. Maria Houborg Petersen of Steno Diabetes Center Odense, Denmark, analyzed data from 2,865 women who had previously been pregnant. The findings suggest that a history of gestational diabetes may be associated with a greater risk of type 2 diabetes and an earlier onset of the disease.
The study, which will be presented at the Annual Meeting of the European Association for the Study of Diabetes (EASD) in Milan, Italy, found that women with previous gestational diabetes were diagnosed with type 2 diabetes at a median age of 43.5 years, compared with 56.3 years among women without a history of gestational diabetes. This significant difference in age at diagnosis highlights the importance of continued monitoring of women after gestational diabetes. The study's results also showed that about 40% of women with a history of gestational diabetes developed type 2 diabetes before the age of 40.
The study's findings also revealed that women with previous gestational diabetes were more likely to require insulin treatment. At enrolment in the study, 10.4% of women with previous gestational diabetes were receiving insulin, compared with 5.2% of those without the history. Blood tests also indicated differences in insulin production, with median fasting serum C-peptide, a marker of the body's insulin production, being 1,068 pmol/L among women with previous gestational diabetes, compared with 1,195 pmol/L among women without it.
The researchers found no significant differences in surrogate measures of insulin production or insulin sensitivity between the two groups. Complications, including kidney disease, nerve damage, and cardiovascular disease, were also broadly comparable between the groups. However, there was a statistically significant difference in diabetic retinopathy, although the researchers cautioned that the numbers were too small to determine whether the finding had meaningful clinical implications.
The study's results highlight the importance of long-term follow-up after a pregnancy affected by gestational diabetes. According to the study team, women with a history of gestational diabetes may face an earlier onset of type 2 diabetes and a greater likelihood of requiring insulin treatment once diabetes develops. Closer surveillance could help identify rising blood sugar levels earlier and support timely intervention before or soon after type 2 diabetes develops.
The study used data from the Danish Centre for Strategic Research in Type 2 Diabetes (DD2) cohort, involving 2,865 women who had previously been pregnant. Of these, 173 women had a history of gestational diabetes, while 2,692 had not experienced the condition. The study's findings reinforce the importance of monitoring women after gestational diabetes and the need for timely intervention to prevent or delay the onset of type 2 diabetes.
The researchers emphasized that the findings do not establish that gestational diabetes itself directly causes earlier type 2 diabetes, but rather highlight the need for continued monitoring and surveillance of women with a history of gestational diabetes. By identifying women at risk and providing timely intervention, healthcare providers may be able to prevent or delay the onset of type 2 diabetes and its associated complications.
Key points
- Women with gestational diabetes develop type 2 diabetes 13 years earlier than those without the condition.
- Women with previous gestational diabetes are more likely to require insulin treatment.
- Long-term follow-up is crucial for women with a history of gestational diabetes to prevent or delay the onset of type 2 diabetes.
