Table 3. Adverse events.

Adverse event (AE) type	Count	Event rate per 1000 h.*
Fall	0	0
Instability (no fall)	0	0
Skin integrity issues	3	111
Bruising	0	0
Skin abrasion	2	74
Pressure injuries	0	0
Soft tissue injury	0	0
Tissue/skin reaction from device-skin contact	1	37
Soft tissue injury	0	0
Blood pressure issues	5	185
Systolic hypertension (140 ≥ mmHg)	2	74
Systolic hypotension (<90 mmHg)	3	111
Mechanical/electrical issues	3	111
Premature battery failure	1	37
Electrical shock	0	0
Burns	0	0
Device malfunction resulting in unanticipated operation	1	37
Device breakdown	1	37
Use error	1	37
Participant error	0	0
Researcher error	1	37
Companion error	0	0
Additional pain from exoskeleton-assisted walking	0	0
Other	0	0

*Event rates are standardized per 1000 h of exposure to standing, walking, and sitting in the powered exoskeleton, for an average of 38.05 min exposure per session for all 43 sessions completed by 12 participants (27.27 h).

$\mathrm{E}\mathrm{x}\mathrm{p}\mathrm{o}\mathrm{s}\mathrm{u}\mathrm{r}\mathrm{e}\text{-}\mathrm{H}\mathrm{o}\mathrm{u}\mathrm{r}\mathrm{s}={\displaystyle \frac{\left(\mathrm{A}\mathrm{v}\mathrm{g}.\mathrm{m}\mathrm{i}\mathrm{n}\mathrm{s}\mathrm{e}\mathrm{x}\mathrm{p}\mathrm{o}\mathrm{s}\mathrm{u}\mathrm{r}\mathrm{e}\times \mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}\mathrm{n}\mathrm{o}.\mathrm{s}\mathrm{e}\mathrm{s}\mathrm{s}\mathrm{i}\mathrm{o}\mathrm{n}\mathrm{s}\right)}{60\mathrm{m}\mathrm{i}\mathrm{n}/\mathrm{h}}}$

$\mathrm{E}\mathrm{v}\mathrm{e}\mathrm{n}\mathrm{t}\mathrm{R}\mathrm{a}\mathrm{t}\mathrm{e}={\displaystyle \frac{\mathrm{E}\mathrm{v}\mathrm{e}\mathrm{n}\mathrm{t}\mathrm{C}\mathrm{o}\mathrm{u}\mathrm{n}\mathrm{t}}{\mathrm{E}\mathrm{x}\mathrm{p}\mathrm{o}\mathrm{s}\mathrm{u}\mathrm{r}\mathrm{e}\text{-}\mathrm{H}\mathrm{o}\mathrm{u}\mathrm{r}\mathrm{s}}\times 1000\mathrm{h}.}$