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Table 1: Neuropsychologic findings in patients with ALS and healthy subjects
Test Healthy Subjects (9) ALS Patients (16) P
Age (years) 51.8 (12.7) 58.6 (10.2) NS
Education (years) 10.0 (4.6) 8.7 (3.1) NS
MMSE (cs) 28.2 (1.6) 26.6 (2.9) NS
SPMT (z) −0.5 (0.6) −0.6 (0.5) NS
BPIT 10 (z) −0.1 (1.3) 0.0 (0.9) NS
BPIT 30 (z) −0.1 (0.9) −0.1 (1.1) NS
FAS (z) −0.4 (0.8) −0.6 (1.3) NS
Stroop 
    Word (z) −0.5 (1.2) −2.8 (4.1) NS
    Color (z) −1.6 (2.5) −4.4 (3.8) NS
    Interference (z) −0.7 (1.6) −1.9 (2.4) NS
SDMT (z) −1.4 (0.9) −2.3 (1.1) .025
Note:—Data are presented as mean (SD). P values were determined with the use of the Mann Whitney U test. ALS indicates amyotrophic lateral sclerosis; cs, corrected score; Z, Z-score; NS, not significant; MMSE, Mini Mental State Examination; SPMT, Spinnler Prose Memory Test; BPIT 10, Brown-Peterson Interference Test at 10 seconds; BPIT 30, Brown-Peterson Interference Test at 30 seconds; FAS, Verbal Fluency Test; Stroop, Stroop Color/Word Interference Test; SDMT, Symbol Digit Modalities Test.