Evidence map›Paper›PMID 41006653›Full record

Observational studyEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2025

Methods matter- construct validity of steps per day in patients with lumbar spinal stenosis.

Malin Eleonora Av Kák Gustafsson, Berit Schiøttz-Christensen, Niels Wedderkopp, Søren Francis Dyhrberg O'Neill, Jan Christian Brønd

Abstract readObservational Study
PubMed Publisher
In one paragraph

Observational study in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Malin Eleonora Av Kák GustafssonMedical Research Unit, Spine Center of Southern Denmark, University Hospital of Southern Denmark, Kolding, Denmark. malin_e.gustafsson@med.lu.se.
Berit Schiøttz-ChristensenResearch Unit of General Practice, University of Southern Denmark, Odense, Denmark.
Niels WedderkoppKI, OUH, Research Unit of Paediatrics, Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
Søren Francis Dyhrberg O'NeillMedical Research Unit, Spine Center of Southern Denmark, University Hospital of Southern Denmark, Kolding, Denmark.
Jan Christian BrøndDepartment of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study aimed to evaluate the ability of a thigh-worn accelerometer to detect walking during daily life in individuals with Lumbar Spinal Stenosis (LSS). Two hypotheses were made regarding how walking measurements from the accelerometer, a walking test, and an ankle-worn StepWatch would relate in order for the accelerometer to be valid. The hypotheses were: (a) there is no difference between the longest walk recorded by the accelerometer during daily life and the maximum walking duration in a walking test, and (b) the accelerometer agrees with the StepWatch in measuring total daily steps.

methodsThis cross-sectional observational study on construct validity included 83 individuals with LSS who had a thigh-worn accelerometer for seven days and completed a walking test. Twenty-one also had an ankle-worn StepWatch simultaneously.

resultsThe duration of the longest walk recorded by the thigh-worn accelerometer and the walking test significantly agreed within an equivalence margin of 34%. The thigh-worn accelerometer recorded fewer steps per day than the ankle-worn StepWatch, Bland-Altman 95% limits of agreement at -162% to 35%, mean difference - 64%. Post hoc analysis showed agreement on step count during continuous walking, Bland-Altman limits of agreement at -7.1% to 1.8%, mean difference - 2.6%.

conclusionThe results suggest that a thigh-worn accelerometer can monitor continuous walking in daily life in individuals with LSS. The thigh-worn accelerometer did not agree with the ankle-worn StepWatch on daily steps. Device type and wear-site should be considered when interpreting step data.

Indexed as

AccelerometryLumbar VertebraeSpinal StenosisWalkingAgedAged, 80 and overCross-Sectional StudiesFemaleHumansMaleMiddle AgedReproducibility of ResultsWalk TestAccelerometerLumbar spinal stenosisMonitoringNeurogenic claudicationValidityWalkingWalking test

Identifiers

PMID41006653

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.