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Published on: November 21, 2013
Childhood growth and future development of psychotic disorder among Helsinki high-risk children
Laura T Niemi1, Jaana M Suvisaari, Jari K Haukka
1Department of Mental Health and Alcohol Research, KTL, National Public Health Institute, Mannerheimintie, Helsinki, Finland. laura.niemi@ktl.fi
Insights
Childhood growth patterns, particularly rapid weight gain (catch-up growth), may increase schizophrenia risk in offspring of mothers with psychotic disorders. Further research is needed to confirm this link.
Area of Science:
- Developmental psychology
- Psychiatry
- Genetics
Background:
- The Helsinki High-Risk (HR) Study tracks offspring of mothers treated for schizophrenia spectrum disorders.
- This study compares growth patterns in HR children and controls.
Purpose of the Study:
- To compare childhood growth between high-risk (HR) and control children.
- To identify if childhood growth patterns predict the development of psychotic disorders in HR offspring.
Main Methods:
- Growth data from childhood health cards were analyzed for 114 HR and 53 control offspring.
- Logistic regression models examined associations between childhood growth and psychotic disorder morbidity within the HR group.
Main Results:
- HR girls showed reduced birth length, which normalized by age 7.
- HR boys exhibited a height deficit that increased significantly by age 10.
- Specific birth ponderal index and 7-year BMI patterns predicted later schizophrenia development in HR children (OR 22.8).
Conclusions:
- Rapid childhood growth (catch-up growth) appears to elevate schizophrenia risk in offspring of mothers with psychotic disorders.
- The independent role of catch-up growth as a risk factor requires further investigation.
Background:
The Helsinki High-Risk (HR) Study is a follow-up study of offspring (born between 1960 and 1964) of all females treated for schizophrenia spectrum disorders in mental hospitals in Helsinki before 1975, and controls.
Aim:
To compare childhood growth among HR and control children, and to determine if any patterns in childhood growth predict later development of psychotic disorders within the HR group.
Methods:
We accessed growth information from childhood health cards, which we obtained for 114 HR and 53 control offspring. The growth of HR children was compared with that of control children. Within the HR group, we investigated whether any association existed between childhood growth patterns and morbidity from psychotic disorders using logistic regression models.
Results:
The HR girls were shorter than controls at birth (p=0.030), but this disparity vanished by age 7. In contrast, HR boys were only slightly shorter at birth than controls, but the height difference increased with age, being statistically significant at 10 years (p=0.020). Among HR children, the combination of being in the lowest tertile for ponderal index at birth but in the highest tertile for BMI at 7 years predicted later development of schizophrenia (OR 22.8, 95% CI 2.0, >100, p=0.040).
Conclusions:
Catch-up growth increases the risk of schizophrenia among offspring of mothers with psychotic disorder. Whether this is an independent risk factor or merely a reflection of some other risk factors needs further research.
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