Table 2.

MARS subscale and item overall means and ranges.

MARS subscales and items	Mean	Range (min. - max.)
Subscale A: Engagement	2.59	1.00–4.80
Item 1 - Entertainment	2.35	1.00–5.00
Item 2 - Interest	2.32	1.00–5.00
Item 3 - Customisation	2.78	1.00–5.00
Item 4 - Interactivity	2.63	1.00–5.00
Item 5 - Target group	2.88	1.00–4.00
Subscale B: Functionality	3.81	1.25–5.00
Item 6 - Performance	3.76	1.00–5.00
Item 7 - Ease of use	3.62	1.00–5.00
Item 8 - Navigation	3.80	1.00–5.00
Item 9 - Gestural design	4.04	1.00–5.00
Subscale C: Aesthetics	3.39	1.00–5.00
Item 10 - Layout	3.19	1.00–5.00
Item 11 - Graphics	4.00	1.00–5.00
Item 12 - Visual appeal	2.98	1.00–5.00
Subscale D: Information	2.85	1.00–4.58
Item 13 - Accuracy of app description (in app store)	3.56	1.00–5.00
Item 14 - Goals	3.14	1.00–4.00
Item 15 - Quality of information	3.32	1.00–5.00
Item 16 - Quantity of information	3.41	1.00–5.00
Item 17 - Visual information	2.97	1.00–5.00
Item 18 - Credibility	1.62	1.00–4.00
Item 19 - Evidence base	3.00	2.00–4.00
Subscale E: Target behaviour (pain and symptom management)	1.39	1.00–4.00
Item 1 - Awareness	2.34	1.00–5.00
Item 2 - Knowledge	1.48	1.00–5.00
Item 3 - Attitudes	1.08	1.00–4.00
Item 4 - Intention to change	1.09	1.00–4.00
Item 5 - Help seeking	1.27	1.00–4.00
Item 6 - Behaviour change	1.09	1.00–3.00
Subscale total (subscales A, B, C, and D)	3.16	1.48–4.58

Note. MARS = Mobile App Rating Scale. Subscale E is not included in the calculation of the Total MARS score. MARS ratings can range from 1 to 5.