Table 2.

Intrarater and Interrater Reliability of the Smartphone App and Physical Therapist Measurements for Shoulder ROM ^a

	Intrarater ICC (95% CI)
ROM Measurement	Physical Therapist	Smartphone App	Interrater ICC (95% CI)
Forward flexion	0.95 (0.92-0.97)	0.94 (0.90-0.96)	0.96 (0.94-0.98)
Abduction	0.97 (0.95-0.98)	0.95 (0.93-0.97)	0.90 (0.85-0.94)
Internal rotation	0.84 (0.76-0.90)	0.75 (0.62-0.84)	0.93 (0.89-0.95)
External rotation	0.96 (0.93-0.97)	0.93 (0.88-0.95)	0.95 (0.92-0.97)
Extension	0.93 (0.90-0.96)	0.90 (0.84-0.93)	0.96 (0.93-0.97)

^a app, application; ICC, intraclass correlation coefficient; ROM, range of motion.