Table 4.

Matrix of integrated qualitative and quantitative data for Actigraph GT9X Link (this device was used as an example).

Outcome of interest	Quantitative result, median (IQR); min-max	Qualitative result	Convergence; discrepancy; silence
Comfort	Midpoint of the Likert scale for perceived comfort (acceptability questionnaire): 3.3 (1.3); 2.0-5.3	Somewhat comfortable Unanimously agreed that the device was too big For some, along with excessive strap length, the device irritated them to the point of being uncomfortable Others felt that despite the size, the device was nonetheless comfortable	Convergence
Perceived usefulness	Midpoint for interest (IMIa): 3.5 (1.4); 2.3-5.3 Midpoint for usefulness (IMI): 4.9 (2.5); 3.0-5.5 Midpoint for effort/importance (IMI): 3.3 (2.9); 2.0-5.8 OK usability (SUSb): 60.0 (15.6); 50.0-67.5 High perceived usefulness (acceptability questionnaire): 4.5 (2.7); 3.3-6.0 Midpoint enjoyment (acceptability questionnaire): 3.7 (1.5); 2.7-4.7	Step count was both interesting and useful Further feedback was desired Device was considered boring due to its limited functionality Dual function as a watch appreciated	Convergence
Ease of use	High perceptions of competence (IMI): 6.7 (3.2); 2.7-7.0 Midpoint for perceived effort (acceptability questionnaire): 3.8 (3.0); 3.0-6.0 Midpoint for effort/importance (IMI): 3.3 (2.9); 2.0-5.8	Participants felt that the device was simple to use, as there was little to no interaction required with it Limited difficulties reported	Partial convergence
Likelihood of wearing a device	Low pressure to wear (IMI): 1.3 (2.0); 1.0-3.3 High perceived choice (IMI): 6.9 (0.9); 6.0-7.0 Midpoint behavioral intentions (acceptability questionnaire): 3.5 (1.4); 1.0-6.0 Midpoint psychological attachments (acceptability questionnaire): 3.8 (2.1); 1.5-6.0 Low facilitating conditions (acceptability questionnaire): 2.5 (4.8); 1.0-6.0	Participants were unclear whether this was a device suitable for long-term use The limited functionality is a plus for some and a barrier to others Almost everyone willing to wear it for science or if instructed by a health care professional Outside of a trial, the device was considered too bulky for long-term use Participants became used to it as the trial progressed; with many preferring it to other tested devices	Partial convergence

^aIMI: Intrinsic Motivation Inventory.

^bSUS: System Usability Scale.