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CompletedNCT00047463Updated Jul 21, 2016Results posted

Effects of Treating Obstructive Sleep Apnea in Epilepsy

A Phase 2 interventional study of continuous positive airway pressure (CPAP) and Placebo-CPAP in Epilepsy, Sleep Apnea and Obstructive Sleep Apnea, sponsored by Vanderbilt University. Completed at 4 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2016-07-21.

Sponsored by Vanderbilt University · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
68
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this trial is to work out design issues prior to conducting a definitive phase 3 trial to determine whether treating sleep-related breathing disorders in people with epilepsy results in improvement in seizure control or an improvement in alertness during the day.

Read the detailed description

Despite appropriate treatment with medications, individuals with epilepsy often continue to have seizures, and many suffer from excessive daytime sleepiness and poor quality of life. Evidence from case studies suggests that treatment of coexisting obstructive sleep apnea (OSA)-stoppage in breathing during sleep-can reduce the frequency of seizures in people with epilepsy that is resistant to antiepileptic medication.

In this study, individuals with symptoms of OSA and 2 or more seizures a month who meet study criteria will undergo polysomnography, a test that continuously monitors normal and abnormal physiological activity during sleep. Those individuals who test positive for OSA will be randomized to either therapeutic or placebo continuous positive airway pressure (CPAP)-a mask treatment for sleep apnea-for 10 weeks, during which time seizure frequency, daytime sleepiness, health-related quality of life, and CPAP compliance will be assessed.

02

Conditions studied

  • Epilepsy
  • Sleep Apnea
  • Obstructive Sleep Apnea

Keywords

  • epilepsy
  • sleep apnea
  • obstructive sleep apnea
  • continuous positive airway pressure
  • CPAP
03

In context

Apnea

1,423 studies on the registry are indexed under Apnea; 160 are open to participants now.

This study's enrollment of 68 is above the median of 51 across 966 interventional studies indexed under Apnea.

Browse Apnea studies →

Lead sponsor

Vanderbilt University is the lead sponsor of 508 studies on the registry; 19 are open to participants now.

Of its 7 completed or terminated interventional studies of FDA-regulated products, 5 (71%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Age of 18 years or older.
  • A history supportive of obstructive sleep apnea.
  • Subject is able and willing to provide informed consent and to cooperate with polysomnography.
  • Four or more quantifiable seizures per month.
  • Subjects and their physicians agree to have their medication regimens optimized so that they are on the best regimen titrated to therapeutic benefit prior to the baseline phase of the study.

Exclusion criteria

Exclusion Criteria:

  • Seizures secondary to drugs, alcohol, infection, neoplasia, demyelination, metabolic illness, or progressive degenerative disease.
  • Non-epileptic spells (e.g., pseudoseizures) alone or in combination with epileptic seizures.
  • Narcolepsy or another primary sleep disorder that requires intervention with medications and which may affect results of study (e.g., severe periodic limb movement disorder).
  • Effectively treated OSA or prior exposure to continuous positive airway pressure.
  • History of poor compliance with antiepileptic medications.
  • Current treatment with the vagus nerve stimulator.
  • Pregnancy.
  • A significant history of medical or psychiatric disease which may impair participation in the trial.
  • A history of alcohol or drug abuse during the one-year period prior to trial participation.
  • Evidence of medical instability (e.g., congestive heart failure, cardiac arrhythmias, pulmonary disease) due to obstructive sleep apnea.
  • Subjects who are unaware of the majority of their seizures and lack a reliable witness.
  • Greater than ten seizures a day.
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
68 participants (actual)

Study arms

  • Active comparator
    CPAP active comparator

    continuous positive airway pressure (CPAP)

    Device: continuous positive airway pressure (CPAP)

  • Placebo comparator
    CPAP Placebo

    Placebo-CPAP

    Device: Placebo-CPAP

Interventions

  • Devicecontinuous positive airway pressure (CPAP)

    a mask treatment for sleep apnea

  • DevicePlacebo-CPAP

    Placebo-CPAP

06

What researchers measure

Primary outcomes

  1. CPAP Adherence/Tolerance as Measured by Proportion of Nights Used

    This measure quantifies how well patients use their CPAP. The standard unit of measurement is proportion of nights that the CPAP is used by a participant (total nights used/total nights the device could have been used), averaged across all participants . Data were downloaded by a card placed in the CPAP machine reflecting use over the entire 10 weeks.

    Time frame: 10 weeks

Secondary outcomes

  1. Number of Patients That Were Able to be Blinded to CPAP or Placebo CPAP

    Patients all received a CPAP machine which either delivered CPAP or provided the patient with placebo CPAP, which had the same sensation as receiving CPAP

    Time frame: 10 weeks

  2. Number of Patients Requiring Only One Night of Baseline Sleep Study to Detect Sleep Apnea

    The data presented below represent the number of participants who required only one night of baseline sleep study prior to randomization

    Time frame: prior to randomization

07

Results

Posted May 3, 2011
Limitations and caveats
Being a pilot study with a relatively small sample size, we were unable to isolate the effects of specific medications or seizure types on the presence of sleep apnea.

Participant flow

This pilot clinical trial was conducted between September 2002 and July 2005 at University of Michigan, Cleveland Clinic, University of North Carolina at Chapel Hill, and Vanderbilt University, with a Data Coordinating Center at the University of Michigan. 68 participants were enrolled and 35 were randomized.

Participant flow — Overall Study
MilestonePlacebo Continuous Positive Airway PressureContinuous Positive Airway Pressure
Started1322
Completed1319
Not completed03
Withdrew: Withdrawal by subject03

Outcome measures

PrimaryCPAP Adherence/Tolerance as Measured by Proportion of Nights Used

This measure quantifies how well patients use their CPAP. The standard unit of measurement is proportion of nights that the CPAP is used by a participant (total nights used/total nights the device could have been used), averaged across all participants . Data were downloaded by a card placed in the CPAP machine reflecting use over the entire 10 weeks.

Time frame:
10 weeks
Reported as:
Mean · proportion of nights used (total nights
CPAP Adherence/Tolerance as Measured by Proportion of Nights Used
proportion of nights used (total nightsPlacebo Continuous Positive Airway PressureContinuous Positive Airway Pressure
CPAP Adherence/Tolerance as Measured by Proportion of Nights Used0.74 ± 0.240.66 ± 0.3
Statistical analysis
  • Placebo Continuous Positive Airway Pressure vs Continuous Positive Airway Pressure · Wilcoxon (Mann-Whitney) · p = 0.26
SecondaryNumber of Patients That Were Able to be Blinded to CPAP or Placebo CPAP

Patients all received a CPAP machine which either delivered CPAP or provided the patient with placebo CPAP, which had the same sensation as receiving CPAP

Time frame:
10 weeks
Reported as:
Number · participants
Number of Patients That Were Able to be Blinded to CPAP or Placebo CPAP
participantsContinuous Positive Airway Pressure (CPAP)Placebo-CPAP
Number of Patients That Were Able to be Blinded to CPAP or Placebo CPAP2213
SecondaryNumber of Patients Requiring Only One Night of Baseline Sleep Study to Detect Sleep Apnea

The data presented below represent the number of participants who required only one night of baseline sleep study prior to randomization

Time frame:
prior to randomization
Reported as:
Number · Participants
Number of Patients Requiring Only One Night of Baseline Sleep Study to Detect Sleep Apnea
ParticipantsAll Participants Prior to Randomization
Number of Patients Requiring Only One Night of Baseline Sleep Study to Detect Sleep Apnea39

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Placebo Continuous Positive Airway Pressure—0/13 (0%)2/13 (15.4%)
Continuous Positive Airway Pressure—0/22 (0%)5/22 (22.7%)
Most frequent other events
Most frequent other events
EventPlacebo Continuous Positive Airway PressureContinuous Positive Airway Pressure
skin irritationSkin and subcutaneous tissue disorders0/132/22
tachycardia or chest tightnessCardiac disorders1/131/22
anxietyPsychiatric disorders1/130/22
nasal congestionEar and labyrinth disorders0/131/22
GI discomfortGastrointestinal disorders0/131/22

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Placebo Continuous Positive Airway PressureContinuous Positive Airway PressureTotal
<=18 years000
Between 18 and 65 years132235
>=65 years000
Age, Continuous
Age, Continuous(years)Placebo Continuous Positive Airway PressureContinuous Positive Airway PressureTotal
Mean40.2 ± 14.342.7 ± 12.341.8 ± 12.9
Sex: Female, Male
Sex: Female, Male(Participants)Placebo Continuous Positive Airway PressureContinuous Positive Airway PressureTotal
Female7815
Male61420
Region of Enrollment
Region of Enrollment(participants)Placebo Continuous Positive Airway PressureContinuous Positive Airway PressureTotal
United States132235
08

Study locations

4 sites
  • University of Michigan
    Ann Arbor, Michigan 48109, United States
  • University of North Carolina
    Chapel Hill, North Carolina 27599, United States
  • Cleveland Clinic Foundation
    Cleveland, Ohio 44195, United States
  • Vanderbilt University
    Nashville, Tennessee 37232, United States
09

References and documents

Publications

  • Malow BA, Foldvary-Schaefer N, Vaughn BV, Selwa LM, Chervin RD, Weatherwax KJ, Wang L, Song Y. Treating obstructive sleep apnea in adults with epilepsy: a randomized pilot trial. Neurology. 2008 Aug 19;71(8):572-7. doi: 10.1212/01.wnl.0000323927.13250.54. PubMed 18711110 ↗
  • Selwa LM, Marzec ML, Chervin RD, Weatherwax KJ, Vaughn BV, Foldvary-Schaefer N, Wang L, Song Y, Malow BA. Sleep staging and respiratory events in refractory epilepsy patients: Is there a first night effect? Epilepsia. 2008 Dec;49(12):2063-8. doi: 10.1111/j.1528-1167.2008.01681.x. Epub 2008 May 29. PubMed 18513353 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 21, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00047463
Lead sponsor
Vanderbilt University
Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)
Responsible party
Beth Ann Malow (Professor of Neurology, Vanderbilt University) — Principal investigator
First posted
Oct 8, 2002
Start date
Sep 2002
Primary completion
Jul 2008
Completion
Jul 2008
Results posted
May 3, 2011
Last update
Jul 21, 2016

Study contacts

Beth Malow, M.D., M.S.
principal investigator · Vanderbilt University

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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