Smartphone usage duration is not associated with increased pain or proprioception deficit in young adults with chronic mechanical low back pain: a cross-sectional study

Bulletin of Faculty of Physical Therapy

Table 3 Lumbar active position sense acuity as measured by the repositioning error angle (RE)

Angle of repositioning error		Mean ± SD	P value	95% CI	Difference between the two-tested durations
Angle of repositioning error		Mean ± SD	P value	95% CI	P value, 95% CI
10-min (n = 58)					.56^b (− 0.93–0.51)
	Baseline	2.62 ± 1.27	.73^a	− 0.40–0.56
	Post-task	2.71 ± 1.59
	Change magnitude	0.08 ± 1.83
30-min (n = 58)
	Baseline	2.87 ± 1.45	.58^a	− 0.60–0.34
	Post-task	2.74 ± 1.21
	Change magnitude	0.13 ± 1.77

CI confidence interval
^aChanges between baseline and post-task assessment for the tested task duration
^bComparison between the magnitude of proprioception acuity change between the 10- and 30-min task duration