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Table 1 Demographic data of all subjects

From: Amplitude of low-frequency fluctuation (ALFF) may be associated with cognitive impairment in schizophrenia: a correlation study

  SZ (n = 44) HC (n = 60) t/χ2 p
Age (years, mean ± S.D.) 25.00 ± 7.49 30.13 ± 8.49 −3.260 0.250
Sex (female/male) 31/13 37/23 0.352 0.866
Education (years, mean ± S.D.) 14.35 ± 3.73 12.52 ± 3.05 2.659 0.009
Medication (Y/N) 41/3 N/A.   
First episode (Y/N) 23/21 N/A.   
Duration (month, mean ± S.D.)a 43.02 ± 42.42 N/A.   
Medication-CPZ Equivalent 365.373 ± 150.8 N/A.   
BPRS (total, mean ± S.D.)a 27.25 ± 9.13 18.46 ± 1.57 7.315 < 0.001
  1. Note: SD Standard deviation, Y Yes, N No, N/A None, BPRS Brief Psychiatric Rating Scale
  2. aincludes missing information for some participants
  3. In the SZ group, 40 were taking atypical antipsychotics including clozapine (y = 0.6903x + 69.747), risperidone (y = 0.0116x + 0.0446), olanzapine (y = 0.0332x + 2.0093), aripiprazole (y = 0.0266x + 5.311), ziprasidone (y = 0.1649x + 46.134) and quetiapine (y = 0.9004x + 85.459) chlorpromazine is represented by “x” in the above formulas, 1 was taking paroxetine, and 3 were not taking any psychotropic medication at the time of scan. All antipsychotic doses were converted to chlorpromazine equivalents using standard procedures, added to demographic data