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July 24, 2009Pediatric NephrologyOpen Access

Six-minute walking test in children with ESRD: discrimination validity and construct validity

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Why the study?

Does the 6MWT accurately reflect functional exercise capacity and correlate with clinical parameters in children with ESRD?

Population

20 children with end-stage renal disease on dialysis for more than 3 months.

Comparison

Six-minute walking test performance evaluation. vs Reference values obtained in healthy children.

Design

Cross-sectional

Key result

Children with end-stage renal disease showed a significantly reduced six-minute walking test performance, achieving only 83% of the predicted distance for healthy children (p<0.0001).

Authors

TTTim TakkenRERaoul EngelbertMBMonique van Bergen

Discussion

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Member takes

Overview

Supports 6MWT for monitoring pediatric ESRD status; leaves open accuracy versus exercise testing and practice change.

Study Design

Type

Cross-Sectional (n=20)

Multicenter

Yes

Structured PICO

Does the 6MWT accurately reflect functional exercise capacity and correlate with clinical parameters in children with ESRD?

P
Population
20 children aged 8 to 18 years with end-stage renal disease on dialysis for more than 3 months, evaluated for functional exercise capacity.
E
Exposure
Six-minute walking test (6MWT) performance evaluation.
C
Comparator
Reference values obtained in healthy children (Li et al. and Geiger et al.).
O
Outcome
6MWT performance compared to reference values, and its relationship with anthropometric variables, clinical parameters, aerobic capacity, and muscle strength.surrogate

Main Result

Absolute Event Rate: 83% vs 100%

p-value: p=<0.0001

The 6MWT is a useful instrument for monitoring clinical status in children with ESRD, strongly associated with hematocrit and height, though it cannot substitute for progressive exercise testing.

Limitations

  • Possible selection bias, as patients who participate in exercise studies may be more interested in physical activity and have a relatively higher exercise capacity than those who do not.
  • Small sample size (n=20).
  • Possible selection bias as patients who participate in exercise studies may have a relatively higher exercise capacity than those who do not.

Cite This Study

Takken et al. (2009) conducted a cross-sectional in End-stage renal disease (ESRD) (n=20). End-stage renal disease vs. Healthy children (reference values) was evaluated on Six-minute walking test (6MWT) performance as a percentage of predicted reference values (p=<0.0001). Children with end-stage renal disease showed a significantly reduced six-minute walking test performance, achieving only 83% of the predicted distance for healthy children (p<0.0001).

synapsesocial.com/papers/6a7b8bda01db1a7270ed14c0https://doi.org/10.1007/s00467-009-1259-x
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