Article

This cross-sectional study investigated the degree of association
between the results of ambulatory step activity monitoring (SAM), self-reported
physical functioning (SRPF) and the 6-minute standardised walking test (6-MWT) in
cancer patients with haematological malignancies. Method: Assessments of
ambulatory SAM, SRPF and 6-MWT were assessed in 102 patients up to 122 days (mean
78 +/- 35) after haematopoietic stem cell transplantation (HSCT). To determine
the association between measures of walking, the Pearson product moment
correlation coefficient (r) including the 95%CI and the r(2) were calculated.
Simple linear regression analyses were performed to estimate the ambulatory step
activity from SRPF and the 6-MWT. RESULTS: The average age was 47 years (+/- 12)
and body mass index 23.4 (+/- 4). The correlations were low between ambulatory
SAM outputs and SRPF (ranging from -0.32 to 0.34, p < 0.01), and very low between
SAM outputs and 6-MWT, (ranging from 0.21 to 0.24). The correlation between SRPF
and the 6-MWT was low (0.33, p < 0.01). The correlation between SRPF and the
6-MWT was low (0.33, p < 0.01). The 95%CIs were quite narrow around r. The shared
variance (r(2)) between the SAM and SPPF ranged between 4% and 11% and the shared
variance between the SAM and 6-MWT ranged between 0.5% and 18%. Linear regression
yielded weak relationships and large standard errors of estimate between the SAM,
SRPF and 6-MWT. CONCLUSIONS: SRPF and the 6-MWT do not reflect daily walking
activity. In clinical use (e.g. to evaluate the effects of a rehabilitation
program), ambulatory step activity outputs can be considered an additional
outcome to assess day-to-day walking activity in patients with haematological
cancer after HSCT.

Langue : ANGLAIS