Table 8.

Content analysis of the design features of the VRT used in the studies.

Studies	Relative quantity of content featuresa	Content feature items
		1b	2c	3d	4e	5f	6g	7h	8i	9j	10k
Brunner et al [40]	+	N/Al	✓m	✓	N/A	N/A	N/A	N/A	N/A	✓	N/A
Abd El-Kafy et al [41]	+++	✓	✓	✓	✓	✓	N/A	✓	N/A	N/A	N/A
Gueye et al [42]	+	N/A	✓	✓	N/A	N/A	N/A	N/A	✓	N/A	N/A
Hsu et al [11]	✓	N/A	✓	✓	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Kiper et al [43]	+++	✓	✓	✓	✓	✓	✓	✓	✓	N/A	✓
Kiper et al [44]	+++	✓	✓	✓	✓	✓	✓	✓	✓	N/A	✓
Rong et al [45]	++	✓	✓	✓	N/A	N/A	N/A	✓	N/A	N/A	N/A
Schuster-Amft et al [16]	+++	✓	✓	✓	✓	✓	N/A	✓	✓	✓	N/A
Sin and Lee [46]	++	N/A	✓	✓	✓	✓	N/A	✓	N/A	N/A	N/A
Taveggia et al [47]	+	N/A	N/A	✓	✓	N/A	N/A	N/A	N/A	N/A	N/A
Yao et al [48]	+++	N/A	N/A	✓	✓	✓	✓	✓	N/A	N/A	✓
Zheng et al [49]	+++	✓	✓	✓	✓	✓	N/A	✓	✓	✓	N/A
Turolla et al [50]	+++	✓	✓	✓	N/A	✓	✓	✓	N/A	✓	N/A
Borstad et al [33]	+++	✓	✓	✓	✓	✓	✓	✓	✓	N/A	✓
Sebastián-Romagosa et al [34]	+	N/A	✓	✓	N/A	N/A	N/A	N/A	N/A	N/A	N/A

^aThe ‘+’, ‘++’, and ‘+++’ keys refer to a few (2-3), medium (4-5), and many (≥6) numbers of features, respectively.

^bItem 1: Offering exercise and functional tasks.

^cItem 2: Having individualized goals.

^dItem 3: Quantifying activity.

^eItem 4: Considering comorbidities and baseline activity level.

^fItem 5: Incorporating patient’s needs.

^gItem 6: Matching patient’s background such as education level.

^hItem 7: Patient’s goal and interest directed.

ⁱItem 8: Involving goal setting.

^jItem 9: Progressive difficulty level.

^kItem 10: Promoting self-efficacy.

^lN/A: not applicable.

^mThe symbol ‘✓’ indicates that descriptions of the virtual reality intervention are found to contain the corresponding feature item.