Ma 2017.

Methods	Randomised controlled trial. No information on randomisation methods other than "random cluster sampling."
Participants	180 community‐dwelling people with MCI (modified Petersen's criteria) in the Binhai New District, Tainjin, China.
Interventions	Experimental intervention: Folic acid 400 mcg daily. Control intervention: conventional treatment.
Outcomes	Chinese version of Wechsler Adult Intelligence Scale ‐ Revised (WAIS‐RC).
Reason awaiting classification	Multiple pieces of information sought from authors about methods, sample size, and results. No response received by 23/05/18.
Notes	Outcomes at different time points (6, 12, and 24 months) are reported in three separate papers.

^{CAMCOG: Cambridge Cognition Examination 
 HHcy: high homocysteine
 MCI: Mild cognitive impairment
 MoCA: Montreal cognitive assessment
 SF‐12: 12‐item Short Form Survey
 VCIND: Vascular cognitive impairment (no dementia)
 WAIS‐RC: Wechsler Adult Intelligence Scale ‐ Revised (China)}