Perinatal risk factors for type 1 diabetes revisited: a population-based register study

Area of Science:

• Pediatric Endocrinology
• Perinatal Epidemiology
• Public Health

Background:

• Previous studies on early life factors influencing type 1 diabetes risk have yielded conflicting results.
• A large-scale, nationwide, prospective study is needed to clarify these associations.

Purpose of the Study:

• To analyze the associations between perinatal factors and the risk of childhood-onset type 1 diabetes.
• To utilize a comprehensive Swedish national registry for robust case-control analysis.

Main Methods:

• A case-control study design was employed, comparing 14,949 children with type 1 diabetes to 55,712 matched controls.
• Data from the Swedish Childhood Diabetes Register, Swedish Medical Birth Register, and National Patient Register were linked.
• Conditional logistic regression analyses were performed after excluding confounders.

Main Results:

• Higher birthweight z score, Caesarean section, premature rupture of membranes, and maternal urinary tract infection were associated with increased type 1 diabetes risk.
• Premature birth before 32 weeks was linked to lower risk, while birth between 32-36 weeks showed higher risk.
• Maternal obesity was independently associated with increased risk in subgroup analyses (1992-2013), diminishing the Caesarean section association.

Conclusions:

• Perinatal factors contribute modestly but significantly to childhood type 1 diabetes risk.
• Maternal obesity presents a potentially modifiable risk factor through improved antenatal care.
• Evolving perinatal practices may influence previously identified risk factors over time.