Table 2. Results of pre- and post-injection fourth week outcome measures in both treatment groups.

	US-guided subacromial injection (n=14)			Blind subacromial injection (n=14)			p
	Median		Min-Max	Median		Min-Max
VAS for pain (cm)				8.5		4-10
Pre-injection	9		4-10				0.60
4 weeks post-injection	1		1-7	2		1-7	0.67
p		0.001			0.001
A VAS for pain	6.5		2-9	6.5		2-8	0.54
Active shoulder flexion ROM°
Pre-injection	150		80-170	140		70-165	0.38
4 weeks post-injection	170		140-180	180		130-180	0.31
p		0.001			0.001
A Active shoulder flexion ROM	30		10-90	35		10-90	0.54
Active shoulder abduction ROM°
Pre-injection	150		80-170	130		70-160	0.57
4 weeks post-injection	180		135-180	170		140-180	0.67
p		0.001			0.001
A active shoulder abduction ROM	30		10-90	40		20-90	0.48
DASH score
Pre-injection	110		45-145	117		62-141	0.54
4 weeks post-injection	35		30-86	51		31-83	0.06
p		0.001			0.001
A DASH score	64.5		15-107	64		30-87	0.95
Constant-Murley score
Pre-injection	39		19-73	37		13-80	0.67
4 weeks post-injection	95		49-100	85		53-97	0.02
p		0.001			0.001
A Constant-Murley score	56		18-63	38.5		16-79	0.23
US: Ultrasound; Min: Minimum; Max: Maximum; VAS: Visual analog scale; ROM: range of motion; ASH: Disabilities of the Arm, Shoulder, and Hand; Δ Mean change.