Brigham & women's Hospital
Boston, Massachusetts, 02115, United States
Completed
NCT Number: NCT01143688
Characterization of Placebo Responses in Stable Asthma
The investigators hypothesize that different placebos will have different effects on subjective and objective asthma outcomes compared with actual therapy and natural history. .
Subjects with asthma are randomly treated with placebo inhaler, placebo acupuncture, albuterol inhaler, or "no treatment" in random order, on three different occasions each. At each of the 12 visits, spirometry is performed repeatedly over 2 hours. Maximum FEV1 achieved and an 11-point, self-reported scale of improvement are examined.
Completed
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Notify MeKey information
Conditions
Age range
18 year–80 year
Sex eligibility
All sexes
Study type
Interventional
Phase
Not applicable
Primary location
Who can participate
Healthy volunteers accepted: No
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
- uncontrolled asthma
Exclusion criteria
- no bronchodilator response
Treatment and study plan
albuterol
DrugPlacebo Inhaler
DrugPlacebo acupuncture
ProcedurePrimary outcomes
-
Change in FEV1
Time frame: FEV1 was assessed every 20 minutes for 2 hours at each visit. There were 4 visits in each block each visit separated by 3-7 days. There were three blocks each block separated by 3-7 days.
The baseline FEV1 (before treatment) was subtracted from the maximum FEV1 recorded during the 2 h period following treatment. This difference value was then converted into percent improvement by dividing by baseline FEV1 and multiplying by 100. Each treatment was given 3 times to each patient, so we averaged the 3 values to yield the mean percent change in FEV1 for each condition.
Secondary outcomes
-
Asthma Symptoms
Time frame: Assesed over 2 hours during each visit. There were 4 visits in each block each visit separated by 3-7 days. There were three blocks each block separated by 3-7 days.
Subjective change in asthma symptoms on a visual-analogue scale with scores ranging from 0 (no positive change) to 10 (complete positive change). These subjective responses were then converted to percent change during the 2 hours by multiplying each score by 10. Each of these individual subject scores were then averaged to produce an average percent change in symptoms.
Sponsors and collaborators
Lead sponsor
Brigham and Women's Hospital
Other
Collaborators
- National Center for Complementary and Integrative Health (NCCIH)
Registry information
Important dates
- Study start
- 2005
- Primary completion
- 2009
- Study completion
- 2009
- First posted
- Jun 14, 2010
- Registry last updated
- Mar 30, 2017
OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.
View the official ClinicalTrials.gov record (opens in a new tab)This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.