Research Article

MTHFR Gene Polymorphism and Age of Onset of Schizophrenia and Bipolar Disorder

Table 4

Regression analysis for age of onset and allele frequency.

DiagnosisModel Unstandardized coefficientsStandardized coefficients
   BStd. ErrorBeta

Schizophrenia1(Constant)11.6281.451      1.0150.312
C8.3331.3490.0291.1790.240
T3.0381.0550.1471.8800.061

Bipolar disorder1(Constant)24.3601.782    13.6660.000
C −0.7081.589−0.034−0.4460.656
T−5.1381.229−0.317−4.1810.000

(a) Dependent variable: age of onset.