Table 3.

Comparison of differences in effectiveness by anatomic location of patch

	Heada versus trunkb		Heada versus extremitiesc		Trunkb versus extremitiesc
BPI Subscaled	Difference in effectiveness	P value	Difference in effectiveness	P value	Difference in effectiveness	P value
Worst pain	0.08	0.1	0.47	0.5	0.39	0.5
Least pain	0.34	0.6	0.94	0.8	0.60	0.7
Average pain	−0.21	0.6	0.33	0.5	0.54	0.7
Pain right now	−0.48	0.3	−0.07	0.9	0.41	0.4
Pain relief,e %	2.71	0.3	11.54	0.8	8.83	0.8

Notes:

^aHead and neck;

^bChest, abdomen, and hips;

^cArms and legs;

^dPain intensity, difference in change from baseline (0 = no pain, 10 = worst imaginable pain);

^ePain relief, difference in change from baseline (0% = no relief, 100% = complete relief); negative is improvement.

Abbreviation: BPI, Brief Pain Inventory.