• Users Online: 93490
  • Home
  • Print this page
  • Email this page
RESEARCH METHDOLOGY
Year : 2000  |  Volume : 48  |  Issue : 3  |  Page : 245-50

Sample size for ophthalmology studies


Public Health Ophthalmology Service, L.V. Prasad Eye Institute, L.V. Prasad Marg, Banjara Hills, Hyderabad 500034, India

Correspondence Address:
T J Naduvilath
Public Health Ophthalmology Service, L.V. Prasad Eye Institute, L.V. Prasad Marg, Banjara Hills, Hyderabad 500034
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


PMID: 11217261

Rights and PermissionsRights and Permissions

Knowledge and the usage of actual sample size formulae are a necessity as validity of the inferences from research studies is often dependent on this. This paper explains how sample sizes are calculated. The concept of sampling variation is explained to emphasize the need for its proper calculation. Sample size formulae are explained with examples to provide researchers with a means of calculating the sample sizes for the commonly used study designs. Ophthalmic data are used as examples. It is perceived that this will improve the quality of inferences drawn from ophthalmic research studies.


[FULL TEXT] [PDF Not available]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 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
    Viewed15166    
    Printed1131    
    Emailed19    
    PDF Downloaded0    
    Comments [Add]    
    Cited by others 2    

Recommend this journal