1 / 8

Data collection and information management

Data collection and information management. RAABs: How frequently should these be done at national or sub-national level? Hans Limburg, MD PhD, DCEH. RAAB. Rapid Assessment of Avoidable Blindness Population-based, representative survey Standardised method: comparable worldwide

talon
Download Presentation

Data collection and information management

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Data collection and information management RAABs: How frequently should these be done at national or sub-national level? Hans Limburg, MD PhD, DCEH

  2. RAAB • Rapid Assessment of Avoidable Blindness • Population-based, representative survey • Standardised method: comparable worldwide • Accuracy depends on sample size • Purpose • Baseline data for planning PBL programmes • Evaluation of ongoing PBL programmes • Cost • Standard RAAB (ss 3000: US$ 20,000 – 40,000) • RAAB + DR: twice as much

  3. Main results from RAAB • Prevalence of blindness, SVI, MVI • Prevalence of low vision • Causes of blindness, SVI, MVI • Prevalence of cataract (BCVA<3/60, <6/60, <6/18) • Cataract surgical coverage • Visual outcome after cataract surgery • Barriers to cataract surgery • Age & sex adjusted prevalence, estimated cases • Age at time of surgery; place of surgery; cost; cause of poor outcome

  4. Where surveys were done Custom survey RACSS RAAB

  5. ‘Repeat’ surveys Cambodia: 2000 and 2007: different survey areas Peru: 2002 and 2011: different survey areas

  6. RAAB in Vietnam 2002 and 2007(prevalence and 95% confidence interval)

  7. RAAB: ideal frequency? Capacity to detect significant change • Conditions comparable • Same survey area • Same survey protocol, age groups, definition • Depending upon sample size • Large sample  narrow confidence interval • Depending on intervention activities • 5-7 years for very active programmes • 8-12 year for less active programmes

  8. Web-based repository for RAABs • Year conducted • Survey area • Reference to publication • Name and address Principal Investigator • Downloads (only with permission from PI) • Zip-file with all reports • Cleaned data as Excel file

More Related