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An investigator wanted to determine whether vitamin A deficiency was associated with birth defects. By reviewing the birth certificates during a single year waarge w… county, the researcher located 209 infants born with neural tube defects (NTDs). A total of 800 other births were selected at random from the certificates serving as controls. Mothers were given a dietary questionnaire. Among mothers who gave birth to an infant with an NTD, 94 reported no use of supplementary vitamins; a total of 137 control mothers did not use a vitamin A supplement. By constructing the appropriate 2 by 2 table, calculate the OR between vitamin A use and NTDs? • Develop a 2×2 table • Identify the rows and columns titles • Identify the row, column values for cells A, B, C, D • Calculate the Odds Ratio Column Title 1 Column Title 2 Row Title 1 А B Row Title 2 D Provide the answer for the following: 19 responses in total). 1. Column title 1: 2. Column Title 2: 3. Row Title 1: 4. Row Title 2: 5. A (numerical value): 6. B (numerical value): 7. C (numerical value): 8. D (numerical value): 9. Odds Ratio Value:
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