Changes of mean scores for each cognitive test after 1 and 2 years of NTZ treatment.

*p**p†pAbbreviations: SRT-LTS = Selective Reminding Test – Long-Term Storage; SRT-CTLR = Selective Reminding Test – Consistent Long-Term Retrieval; SRT-D = Selective Reminding Test –Delayed; SPART = 10/36 Spatial Recall Test; SPART-D = 10/36 Spatial Recall Test-Delayed; SDMT = Symbol Digit Modalities Test; PASAT 3 = Paced Auditory Serial Addition Test three second rate; PASAT 2 = Paced Auditory Serial Addition Test two second rate; WLG = Word List Generation; ST = Stroop Test.Values are expressed as Mean (SD).