Farah Abi-Akar (MDE) - Maryland Department of Natural Resources ...

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Data • Acknowledgements MDE BSID Section MD DNR MBSS Chesapeake Bay Program EPA ORD University of Maryland Versar Programs: SAS and R
Goal: Compare Bio to Stressors • How Using case-control statistics Commonly used in epidemiology: Mantel-Haenszel Odds or Risk Ratios Categorizes all samples into groups, then compares numbers in each group. Groups characterized by: • Biology: or • Stressor: Above or Below • Region and order
Page 1 and 2: Biological Stressor Identification
Page 3 and 4: Background
Page 5 and 6: Background • MD Water Quality Sta
Page 7 and 8: Background • WQS not met Watersh
Page 9 and 10: How the BSID works
Page 11: Data • DNR’s Maryland Biologica
Page 15 and 16: Goal: Compare Bio to Stressors Cont
Page 17 and 18: Goal: Compare Bio to Stressors 2. S
Page 19 and 20: Goal: Compare Bio to Stressors Stre
Page 21 and 22: Goal: Compare Bio to Stressors Stre
Page 23 and 24: 1. Do these overlap Yes they are n
Page 25 and 26: Goal: Compare Bio to Stressors
Page 27 and 28: Goal: Compare Bio to Stressors •
Page 29 and 30: Thanks to odds ratios, probable str
Page 31 and 32: Attributable Risk • ARs are also
Page 33 and 34: Stressor above Cases 6 Controls 9 E
Page 35 and 36: Group Stressor AR Sources - Agr Hig
Page 37 and 38: # Watersheds Impacted per Stressor
Page 39 and 40: BSID Output • Watershed-specific
Page 41 and 42: What’s next • Analysis of resul

Farah Abi-Akar (MDE) - Maryland Department of Natural Resources ...

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