Abstract
We measured red blood cell (RBC) choline and plasma choline concentrations in 27 chronic schizophrenic inpatients and 23 normal controls. Both blood choline measures had a significant test-retest reliability in patients whose neuroleptic status remained unchanged over 1 month. RBC choline concentration was significantly lower in patients medicated with neuroleptics and cogentin. Patients with a low RBC choline and a low RBC/plasma choline ration were on significantly higher doses of medication and had higher scores on the hostility/suspiciousness subscale of the Brief Psychiatric Rating Scale. RBC choline increased when neuroleptics were discontinued. Blood choline measures were also compared among medication-free schizophrenic patients, inpatients with other diagnoses, and normal controls. No significant differences were seen among these groups for any choline measure, although the schizophrenic patients showed greater variability. Medication-free schizophrenic patients with such clinical factors as tardive dyskinesia and abnormalities on computed tomography contributed to this variability. Age was positively correlated with plasma choline.
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