(All Steps) In a study of sudden infant death syndrome [SIDS], the authors report that "7 of the 53 infants who had broncheo-pulmonary displasia [BPD] (13%)


Question:

  1. In a study of sudden infant death syndrome [SIDS], the authors report that "7 of the 53 infants who had broncheo-pulmonary displasia [BPD] (13%) and two of the 65 control infants were victims of SIDS (p=.0392)", using the standard (uncorrected) chi-square test.  Confirm this result.
  2. Give a 2-tailed Fisher's exact p-value for the above comparison.  What is your conclusion using this test statistic?
  3. What is the RR of SIDS for an infant with BPD relative to a control infant?  Give a 95% confidence interval for this RR.  Verbally interpret this result.
  4. What is the OR of SIDS for an infant with BPD relative to a control infant?  Give a 95% confidence interval for this OR.  Verbally interpret this result.
  5. Compare the RR and OR derived in 3 & 4 above.  Comment on this comparison.

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