Linkage Scan for Subsets of Schizophrenia Based on Age at Onset and Cognitive Deficits
Author Information
Author(s): Lien Yin-Ju, Hsiao Po-Chang, Liu Chih-Min, Faraone Stephen V., Tsuang Ming T., Hwu Hai-Gwo, Chen Wei J.
Primary Institution: National Taiwan University
Hypothesis
Using a homogeneous subtype of schizophrenia based on age at onset or neurocognitive deficits can help obtain increased linkage signals.
Conclusion
The study found possible evidence of linkage on chromosome 2q22.1 in families of schizophrenia patients with more cognitive deficits and younger age at onset.
Supporting Evidence
- A maximum LOD score of 4.17 was found at 2q22.1 in families ranked by age at onset.
- Further subsetting by cognitive test performance increased the LOD score to 7.71.
- Significant familial resemblance was observed for age at onset and neurocognitive performance.
Takeaway
Researchers looked at families with schizophrenia to find genetic clues based on when symptoms started and how well they think. They found a possible link to a specific part of a chromosome.
Methodology
Patients with schizophrenia and their first-degree relatives were genotyped and assessed using various cognitive tests.
Potential Biases
The study may have risks of false positives due to multiple testing.
Limitations
The study's sample consisted only of adults with Han Chinese ancestry, which may limit the generalizability of the findings.
Participant Demographics
The study included patients with schizophrenia and their first-degree relatives, primarily of Han Chinese ancestry.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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