Table 2

Correlations Between Presence of MTPs in Shoulder Muscles and Demographic and Clinical Characteristics and Symptoms

Variable	Upper Trapezius	Lower Trapezius	Infraspinatus	Supraspinatus
Age	–0.16	–0.08	0.03	0.09
Body mass index	–0.12	–0.24	–0.09	0.02
Beck Depression Index	–0.02	–0.12	0.28a	0.32a
Duration of symptoms	–0.22	0.16	–0.14	0.02
Pain at rest (Penn Shoulder Score)	0.04	0.05	0.01	0.15
Pain during normal activities (Penn Shoulder Score)	0.00	0.07	0.21	–0.02
Pain during strenuous activities (Penn Shoulder Score)	–0.01	0.05	0.08	–0.08
Pain during ROM
Sagittal flexion	0.22	0.39b	0.20	0.15
Scapular flexion	0.19	0.24	0.10	–0.02
Internal rotation	0.43b	0.44a	0.14	–0.04
External rotation	0.36b	0.22	–0.01	–0.18
Pain during strength tests
Scapular flexion	0.24	0.27a	0.11	0.09
Internal rotation	0.38b	0.33a	0.12	0.09
External rotation	0.25	0.30a	0.10	0.00
Penn Shoulder Score, function	–0.04	–0.33b	–0.22	–0.12
ROM
Sagittal flexion	–0.04	–0.05	–0.30a	–0.09
Scapular flexion	–0.02	0.09	–0.24	–0.16
Internal rotation	0.18	0.12	–0.18	–0.08
External rotation	0.03	–0.35	0.31a	–0.08
Strength
Scapular flexion	0.15	0.23	–0.24	–0.17
Internal rotation	0.07	0.18	–0.24	–0.21
External rotation	0.06	0.27a	–0.16	–0.10

ROM, ranges of motion.

^aP < .05.

^bP < .01.