Evidence map›Paper›PMID 25325505›Full record

Trial reportSleep2014

Quality-adjusted life-years gain and health status in patients with OSAS after one year of continuous positive airway pressure use.

Camila F Rizzi, Marcos B Ferraz, Dalva Poyares, Sergio Tufik

Abstract readClinical Trial
In one paragraph

Trial report in Sleep, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
–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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Trial
  4. Article
  5. Impact of Philips device recall on adults with obstructive sleep apnea treated with PAP therapy: Results of a cross-national patient survey.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Perspectives on primary care management of obstructive sleep apnea: a qualitative study of patients and health care providers.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2021
    Article
  12. The cost-effectiveness analysis of drug therapy versus surgery for symptomatic adenoid hypertrophy by a Markov model.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2020
    Article
  13. Article
  14. Review
  15. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors.

Camila F RizziSleep Medicine and Biology Discipline, Psychobiology Department, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Marcos B FerrazSleep Medicine and Biology Discipline, Psychobiology Department, Universidade Federal de Sao Paulo, Sao Paulo, Brazil: Sao Paulo Center for Health Economics - GRIDES, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Dalva PoyaresSleep Medicine and Biology Discipline, Psychobiology Department, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Sergio TufikSleep Medicine and Biology Discipline, Psychobiology Department, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

objectivesTo estimate the health utility score and quality-adjusted life-years (QALY) index of obstructive sleep apnea syndrome (OSAS) in patients over 1 y of continuous positive airway pressure (CPAP) treatment.

designLongitudinal interventional study.

settingThe study was carried out in Sao Paulo Sleep Institute, Brazil. PATIENTS AND

participantsNinety-five patients with OSAS and with apnea-hypopnea index (AHI) > 20 of either sex, body mass index < 40 kg/m(2), and no previous contact with CPAP were included.

interventionsThe participants underwent baseline and titration polysomnographies, clinical evaluation, and ambulatory blood pressure (BP) measurement, completed Short-Form 6 Dimension Health Survey (SF-6D) and Epworth Sleepiness Scale (ESS) questionnaires, and implementation of CPAP. The patients were followed for 1 y. MEASUREMENTS AND

resultsThe mean AHI and age were 57.6 ± 29.2 events/h and 53.3 ± 9.3 y, respectively. One year of CPAP treatment increased the health utility score from 0.611 ± 0.112 to 0.710 ± 0.121 (P < 0.01). Therefore, CPAP resulted in a mean gain of 0.092 QALY/patient. The improvements in utility scores were associated with decreases in the ESS after 1 mo, in systolic BP after 1 y, and in diastolic BP at 6 mo. BP normalization group (≤ 130/85 mmHg) showed higher QALY than that of the non-normalization group (0.10 ± 0.09 versus 0.05 ± 0.10; P = 0.03). One-year ESS score (P = 0.03), diastolic BP reduction P = 0.01) and baseline utility scores (P < 0.01) were significantly associated with QALY gain.

conclusionThis study showed a significant QALY/patient gain after 1 y of regular CPAP use. In addition, BP normalization was associated with higher QALY gain. Thus, utility studies can provide more complete analyses of the total benefits of CPAP treatment in patients with OSAS and should be encouraged.

Indexed as

Continuous Positive Airway PressureHealth StatusQuality-Adjusted Life YearsAdultAgedBlood PressureBlood Pressure Monitoring, AmbulatoryBody Mass IndexBrazilFemaleHealth SurveysHumansLongitudinal StudiesMaleMiddle AgedPolysomnographyCPAPobstructive sleep apnea (OSA)quality-adjusted life-years (QALY)utility

Identifiers

PMID25325505
PMCPMC4548506

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.