RESUMO
OBJECTIVES: Telemedicine provides much potential for promoting health care. The Montreal Cognitive Assessment (MoCA) is a screening tool for identifying mild cognitive impairment. This study aims to evaluate the agreement between MoCA assessed face-to-face vs via videoconference using a mobile phone. DESIGN: A randomized crossover study. SETTING AND PARTICIPANTS: A randomly selected sample of patients admitted to the geriatric rehabilitation department in a large tertiary medical center in 2021-2022. METHODS: The MoCA was conducted twice for each patient, with a 10- to 20-day interval between assessments. To avoid a learning effect, alternate MoCA versions were used for each patient. Intraclass correlation coefficient (ICC), kappa, weighted kappa, and the Bland-Altman plot were used to evaluate the agreement between administration methods. To identify variables associated with low agreement, data on participant characteristics, order of administration methods, and test versions were collected, and univariate and multivariable analyses were performed. RESULTS: Forty-four patients were included in the study. The median age was 83 years [interquartile range (IQR 76-87)] and 75% were females. Median overall MoCA score was 24 points (IQR 21-26) when administered face-to-face, and 23.5 points (IQR 21-26) via videoconference. Excellent agreement (ICC = 0.89) was observed in the total MoCA score. Moderate-substantial agreement was observed in subsection scores (kappa 0.436-0.686), except for the language subsection where fair agreement was observed (kappa 0.331). Anxiety was assessed by Hospital Anxiety and Depression Scale and associated with lower agreement (ICC = 0.76 in patients with anxiety vs ICC = 0.92 in patients without anxiety). None of the other studied variables were associated with a difference between administration methods. CONCLUSIONS AND IMPLICATIONS: Conducting a MoCA via videoconference using a mobile phone is another method of providing medical care to people without significant visual or hearing impairment that restricts their use of a mobile phone, during routine times and in emergencies where social distancing is needed.