Madras schizophrenia symptom data
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Symptom = thought disorders



The variables are (in column order):

     ID     = patient ID
     Y      = symptom indicator
     MONTH  = month since hospitalization
     AGE    = age-at-onset (1= age<20 ; 0= age>=20)
     GENDER = gender (1=female; 0=male)
     MONTH*AGE
     MONTH*GENDER