Journal of Postgraduate Medicine
 Open access journal indexed with Index Medicus & ISI's SCI  
Users online: 4544  
Home | Subscribe | Feedback | Login 
About Latest Articles Back-Issues Article Submission Resources Sections Etcetera Contact
 
  NAVIGATE Here 
 ::   Next article
 ::   Previous article
 ::   Table of Contents

 RESOURCE Links
 ::   Similar in PUBMED
 ::  Search Pubmed for
 ::  Search in Google Scholar for
 ::Related articles
 ::   Citation Manager
 ::   Access Statistics
 ::   Reader Comments
 ::   Email Alert *
 ::   Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed4743    
    Printed184    
    Emailed1    
    PDF Downloaded107    
    Comments [Add]    
    Cited by others 3    

Recommend this journal


 

 BRIEF REPORT
Year : 2000  |  Volume : 46  |  Issue : 4  |  Page : 262-4

Reducing the number of daily measurements results in poor estimation of diurnal variability of peak expiratory flow in healthy individuals.


Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh- 160 012, India. , India

Correspondence Address:
D Gupta
Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh- 160 012, India.
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


PMID: 11435652

Rights and PermissionsRights and Permissions

AIM: To determine the effect of reducing number of daily measurements on estimation of diurnal variability (DV) of peak expiratory flow (PEF). SUBJECTS AND METHODS: PEF was recorded five times daily for three days in 152 healthy adults. Amplitude percent mean (A%M) and standard deviation percent mean (SD%M) were calculated on third day from five, four, three and two daily readings. Proportion of variability explained by partial schedules was calculated and limits of agreement derived to assess if these methods could be used interchangeably. RESULTS: Four, three and two measurements explained 90-95%, 70-82% and 55% DV respectively using A%M. All schedules of partial measurement using SD%M explained >90% DV. Limits of agreement for A%M and SD%M widened as number of measurements were reduced. CONCLUSIONS: DV obtained by fewer daily measurements agrees poorly with results obtained from five measurements. SD%M is a better alternative if DV is assessed from fewer readings.






[FULL TEXT] [PDF]*


        
Print this article     Email this article

Online since 12th February '04
2004 - Journal of Postgraduate Medicine
Official Publication of the Staff Society of the Seth GS Medical College and KEM Hospital, Mumbai, India
Published by Wolters Kluwer - Medknow