Fig. 3From: Mobile robotic cart development to support home oxygen therapy patients: Study on handling interface for mobile robotic cart similar to wheeled walkerQuestionnaire results from HOT patients. There is a correlation between the preferred type of cart and the average time spent going out per week. a Questionnaire result about preferred cart type, valid response 27, multiple answers are allowed. b Correlation between the patients average time spent going out per week and preferred cart typeBack to article page