Change in score of Mini-Mental State Examination (MMSE)
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
The MMSE contains a total of 30 items that assess orientation, registration, attention and calculation, recall, and language, with a score range from 0 to 30. Generally, a higher MMSE score reflects a better cognitive function.
Changes in score of MoCA
Time frame · from baseline to weeks 24, 48, and 76 of treatment (the core study spans from baseline to 24, and 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
The MoCA (Chinese version) is a screening instrument for MCI comprised of 30 items to assess multiple cognitive domains (memory recall, visuospatial abilities, executive functions, attention, language, and orientation to time and place; scores range from 0 to 30, with higher scores indicating better cognitive function). Participants received one additional point if they had a MoCA score \< 30 and 12 years or less of formal school education.
Changes in total score of RBANS
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
The RBANS (Chinese version) is a brief neuropsychological screening battery with established test-retest reliability and age-appropriate normative data, which consists of 12 task tests assessing 5 cognitive domains, namely immediate memory, visuospatial/ constructional, language, attention and delayed memory, with a score range from 40 to 160. A higher RBANS score reflects a better global cognitive function.
Change in the RBANS index score of immediate memory
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
The RBANS (Chinese version) is a brief neuropsychological screening battery with established test-retest reliability and age-appropriate normative data. The RBANS includes 12 sub-tests that generate five age-adjusted index scores and a total score. The five indices include immediate memory (consisting of list learning and story memory tests), visuospatial/constructional domain (consisting of figure copying and line orientation tests), language (consisting of picture naming and semantic fluency tests), attention (consisting of digit span and coding tests) and delayed memory (consisting of list recall, story recall, figure recall and list recognition tests). Generally, a higher index score reflects a better cognitive subdomain function.
Change in the RBANS index score of visuospatial/constructional
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as the RBANS index score of immediate memory.
Change in the RBANS index score of language
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as the RBANS index score of immediate memory.
Change in the RBANS index score of attention
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as the RBANS index score of immediate memory.
Change in the RBANS index score of delayed memory
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as the RBANS index score of immediate memory.
Change in aggregate time to test completion for Trail Making Test (TMT)
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
The TMT is a validated timed measure of processing speed, which consists of part A and part B (TMT-A and TMT-B). The time limits for performing the TMT-A and TMT-B are 180 and 300 seconds, respectively. Processing speed is estimated by the aggregate time in seconds to complete TMT-A and TMT-B such that less time indicate faster processing speed.
Change in aggregate time to test completion for Victoria Stroop Color-Word Test
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
The Victoria Stroop Color-Word Test is a well-known measure of executive function. There are three indices including Stroop-dot, Stroop-word and Stroop-color word in the test. The color task consists of colored dots; the word task comprises ordinary words that are unrelated to the meaning of color; the color-word task consists of words written in color that indicate the meaning of the color, but the color of these words differs from the meaning of the word itself. The participants were asked to quickly read the color of the dots or Chinese words on the cards. The sum of consuming time taken to read the three cards is used as an index of executive function performance. Less time indicates better executive function.
Changes in MRI-derived total brain volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Philips TX 3.0T superconducting clinical MRI will be used for magnetic resonance scanning (Philips Achieva 3T TX Medical Systems, Eindhoven, the Netherlands). T1 images were processed using Freesurfer software (version 8.1.0, https://surfer.nmr.mgh.harvard.edu) to calculate intracranial volume, total gray matter volume, total white matter volume, cerebrospinal fluid volume and volumes of 68 cortical and 14 subcortical regions based on the Desikan-Killiany atlas23. The total brain volume was calculated as the sum of the gray matter and white matter volumes.
Changes in MRI-derived total gray matter volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume.
Changes in MRI-derived total white matter volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume.
Changes in MRI-derived cerebrospinal fluid volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume.
Changes in MRI-derived white matter hyperintensity volume (WMH)
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Total white matter hyperintensity volume was measured from FLAIR images using the Lesion Segmentation Tool for Statistical Parametric Mapping (SPM) 12.0.
Changes in MRI-derived frontal gray matter volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume. Frontal gray matter volume was calculated as the sum of all frontal lobe regions parcellated by FreeSurfer (Desikan-Killiany atlas).
Changes in MRI-derived parietal gray matter volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume. Parietal gray matter volume was calculated as the sum of all parietal lobe regions parcellated by FreeSurfer (Desikan-Killiany atlas).
Changes in MRI-derived temporal gray matter volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume. Temporal gray matter volume was calculated as the sum of all temporal lobe regions parcellated by FreeSurfer (Desikan-Killiany atlas).
Changes in MRI-derived occipital gray matter volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume. Occipital gray matter volume was calculated as the sum of all occipital lobe regions parcellated by FreeSurfer (Desikan-Killiany atlas).
Changes in MRI-derived insula gray matter volume
Time frame · from baseline to week 48, and 76 of treatment (the core study spans from baseline to 48 weeks, and the week 76 assessment will be analyzed and reported after the extension phase).
Registry description
Measurements and instruments are the same as total brain volume.