New Study Reveals Sex and Weight Differences in Type 1 Diabetes Control in Young People

A1C is a blood test that shows average blood sugar levels over about three months. It's one of the most important tools for understanding how well Type 1 diabetes is being managed. A lower A1C generally indicates better blood sugar control and reduces the risk of long-term diabetes complications.

This new study looked at whether boys and girls follow different A1C patterns as they grow up, and whether weight affects these patterns differently by sex. Understanding these differences could help doctors provide better, more personalized care.

Researchers analyzed data from 674 young people (299 females and 375 males) in British Columbia, Canada, tracked between 2016 and 2023. They looked at A1C measurements at different ages and compared them by sex and weight categories.

At age 5, boys and girls had virtually identical A1C levels. However, this changed during adolescence. By age 14, teenage boys had noticeably lower A1C levels than teenage girls. By age 18, the difference had grown even larger, with young women's A1C levels significantly higher than young men's.

Weight also played a role. Young people who were overweight or living with obesity had higher A1C levels starting around age 15. This effect was more noticeable in females than males.

The study documents these differences but doesn't explain why they occur. Several factors could contribute, including differences in hormonal changes during adolescence, variations in how diabetes management is approached, differences in access to care or resources, or biological differences between males and females in how the body regulates blood sugar.

The findings suggest that healthcare teams should pay special attention to blood sugar management in teenage girls and young women, particularly those who are overweight or living with obesity.

If you're a parent or caregiver of a girl or young woman with Type 1 diabetes, this research suggests it may be especially important to have regular check-ins with your diabetes care team during the teenage years. Conversations about A1C goals, insulin regimens, and lifestyle support could help identify any challenges early.

This study also underscores that Type 1 diabetes management isn't one-size-fits-all. Working closely with a diabetes care team to develop a personalized plan that accounts for your child's individual needs—including sex and weight—is an important part of long-term health.

Source: BMJ open. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.