Skip to main content
Figure 4 | BMC Public Health

Figure 4

From: Assessment of physical activity in older Belgian adults: validity and reliability of an adapted interview version of the long International Physical Activity Questionnaire (IPAQ-L)

Figure 4

Difference between self-reported total PA and Copeland total PA for each quartile of Copeland total PA. Legend: PA = physical activity; Copeland total PA = weekly minutes of accelerometer-derived physical activity ≥50 counts.min−1; Q1 = first quartile; Q2 = second quartile; Q3 = third quartile; Q4 = fourth quartile. y-axis represent differences between self-reported total PA and Copeland total PA, expressed as a percentage; x-axis represent quartiles of Copeland total PA. Full lines represent median (M) percentage of difference, dotted lines show the 90% nonparametric limits of agreement (LOA), representing 5th and 95th percentiles (P5 and P95): Q1: M = −67.1; P5 = −100.0 (95% CI for P5: −100.0 - -96.3); P95 = 6.0 (95% CI for P95:-3.8 – 28.0); Q2: M = −66.6; P5 = −98.2 (95% CI for P5: −100.0 - -96.2); P95 = −5.8 (95% CI for P95: −27.9 – 5.5); Q3: M = −70.2; P5 = −97.5 (95% CI for P5: −99.3 – -91.8); P95 = −14.9 (95% CI for P95: −30.6 – -3.5); Q4: M = −67.9; P5 = −95.3 (95% CI for P5: −97.8 - -93.1); P95 = −28.6 (95% CI for P95: −35.3 - -13.7).

Back to article page