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. 2020 Feb 6;9(1):e13355. doi: 10.2196/13355

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©Aissata G Dieng, Jie He, Thomas G Poder. Originally published in the Interactive Journal of Medical Research (http://www.i-jmr.org/), 06.02.2020.

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 the Interactive Journal of Medical Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.i-jmr.org/, as well as this copyright and license information must be included.

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Cumulative decreasing frequencies of positive answers yes. DC: dichotomous choice; DC-OE: dichotomous choice followed by an open-ended question; MBDC: multiple-bounded discrete choice.