Trial reportRespirology (Carlton, Vic.)2025
Objective Effects and Patient Preferences for Ambulatory Oxygen in Fibrotic Interstitial Lung Disease With Isolated Exertional Hypoxaemia: A Placebo-Controlled 6-Minute Walk Test Study.
Trial report in Respirology (Carlton, Vic.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02668029 (Effect of Ambulatory Oxygen on the Walking Test in Patients With Pulmonary Fibrosis Normoxemic at Rest Who Desaturate on Exercise), which is not on this map. Cited by 2 papers.
What it found
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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.
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.
Effect of Ambulatory Oxygen on the Walking Test in Patients With Pulmonary Fibrosis Normoxemic at Rest Who Desaturate on Exercise
Who cites it
2 citing papers in PubMed.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
objectiveThe available evidence on the effects of ambulatory oxygen on exercise impairment in patients with fibrotic interstitial lung diseases (F-ILD) is of limited quality.
methodsWe conducted a randomised, double-blind, placebo-controlled crossover trial with 32 normoxaemic F-ILD patients, desaturating to ≤ 88% during a baseline 6-minute walk test (6MWT) on ambient air. After determining the oxygen flow needed to prevent desaturation, patients completed two double-blind 6MWTs with either oxygen or placebo (compressed medical air) at the same personalised flow. Objective measures included oxygen saturation, pulse rate, and distance walked. Patient-reported outcomes, assessed via visual analogue scales, included end-of-test dyspnoea, fatigue, and preferences for walking with oxygen or placebo versus each other and ambient air.
resultsAmbulatory oxygen, compared to placebo, prevented desaturation, reduced tachycardia, increased walking distance by 37 m (95% CI: 10-74, p = 0.008), and lessened dyspnoea and fatigue. The mean preference score for oxygen over placebo was 2.6 (95% CI: 1.9-3.2, p < 0.0005), significantly greater than equivalence. The preference score for placebo over ambient air was -1.5 (-2.4 to 0.64, p = 0.005), significantly lower than equivalence, while the score for oxygen over ambient air was 0.4 (-0.7 to 1.5), not significantly different from equivalence.
conclusionsOur data confirm that ambulatory oxygen provides significant benefits beyond a placebo effect; although in some patients it is associated with a negative perception that may hinder treatment acceptance. This strengthens the evidence supporting current recommendations and suggests that incorporating patient preferences recorded at the time of the 6MWT into clinical discussions can aid shared decision making regarding ambulatory oxygen.
trial registrationClinicalTrials.gov identifier: NCT02668029.
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