Table 2.

Analysis of primary and secondary outcome measures

Outcome measures		Parameter	Value	p value (description)
Primary outcome measures	Pain	Pre-treatment score Post-treatment score Difference	2684 patients (7.56 ± 1.80) 2672 patients (4.43 ± 2.14) 2672 patients (3.12 ± 1.96)	0.0008* (difference)
	Function/ADL	Yes No	2492 patients (96.36%) 94 patients (3.64%)	< 0.0001*
	Medication usage	Eliminated Decreased No effect	231 patients (11%) 1123 patients (53.42%) 748 patients (35.58%)	< 0.0001* (eliminated + decreased vs. no effect)
	Sleep improvement	Yes No	1620 patients (59.76%) 1091 patients (40.24%)	< 0.0001*
Secondary outcome measures	Work performance	Yes No	830 patients (81.61%) 187 patients (18.39%)	< 0.0001*
	Preference for HWDS compared to prior treatment	More Same Less	1658 patients (63.40%) 905 patients (34.60%) 52 patients (2.00%)	< 0.0001* (HWDS vs. prior treatments)
	Patient expectation	Exceeded Met Fallen short	863 patients (33.43%) 1604 patients (62.12%) 115 patients (4.45%)	< 0.0001* (exceeded or met vs. falling short)
	Patient satisfaction with service	Excellent Satisfactory Poor	2208 patients (84.11%) 405 patients (15.43%) 12 patients (0.46%)	< 0.0001* (excellent or satisfactory vs. poor)
	Patient confidence in device use	Excellent Satisfactory Poor	1980 patients (75.60%) 621 patients (23.71%) 18 patients (0.69%)	< 0.0001* (excellent or satisfactory vs. poor)

*Demonstrates statistical significance