TABLE III.

Migration Values According to Tear Location and Presence of Pain (N = 160)

	Migration
	Asymptomatic Side (N = 98)			Symptomatic Side (N = 62)
Patient Category	No. of Shoulders	Mean and Stand. Dev. (mm)	P Value*	No. of Shoulders	Mean and Stand. Dev. (mm)	P Value*
Tear location category (non-controls†)
Infraspinatus, or supraspinatus and infraspinatus	10	0.50 ± 1.0	0.03‡	19	1.01 ± 1.5	0.01‡
Supraspinatus	63	−0.44 ± 1.3		40	−0.09 ± 1.5
Pain	Not applic.					0.80
No				21	0.14 ± 1.31
Yes				41	0.25 ± 1.67

^*The p values were derived, with an unpaired t test, in a comparison of the patient categories within the asymptomatic or symptomatic group.

^†Non-controls indicate shoulders in which a rotator cuff tear was demonstrated by ultrasound.

^‡The p value indicates significance (p < 0.05).