Influencing Factors on the Overestimation of Self-Reported Physical Activity: A Cross-Sectional Analysis of Low Back Pain Patients and Healthy Controls

Table 2

Descriptive results on objective and self-reported physical activity.

	Total sample ()	Healthy controls ()	Low back pain ()
Sedentary time (min/day)
Objective physical activity (Actigraph) (mean (SD))	577 (±103)	591 (±108)	547 (±85)	0.153
Self-reported physical activity (GPAQ) (mean (SD))	454 (±214)	528 (±196)	298 (±160)	<0.001⁢
	<0.001⁢	0.009⁢	<0.001⁢
Moderate physical activity (min/day)
Objective physical activity (Actigraph) (mean (SD))	43 (±19)	44 (±19)	41 (±20)	0.676
Self-reported physical activity (GPAQ) (mean (SD))	85 (±88)	69 (±75)	120 (±105)	0.050
	0.003⁢	0.153	0.004⁢
Vigorous physical activity (min/day)
Objective physical activity (Actigraph) (mean (SD))	2 (±2)	2 (±2)	1 (±3)	0.030⁢
Self-reported physical activity (GPAQ) (mean (SD))	41 (±62)	38 (±54)	47 (±79)	0.706
	<0.001⁢	<0.001⁢	0.009⁢

Wilcoxon signed-rank test for assessment differences; ²Mann-Whitney test for group differences; statistically significant at the significance level .