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. 2019 Nov 29;2(2):e15429. doi: 10.2196/15429

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©A Hasan Sapci, H Aylin Sapci. Originally published in JMIR Aging (http://aging.jmir.org), 29.11.2019.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Aging, is properly cited. The complete bibliographic information, a link to the original publication on http://aging.jmir.org, as well as this copyright and license information must be included.

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Table 4.

Levels of evidence (N=91).

Category	Articles, n (%)
I	5 (5)
II	6 (6)
IV	45 (49)
V	35 (38)