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From |
"Carlo Lazzaro" <carlo.lazzaro@tiscalinet.it> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: R: Can I Use Rate Ratios to Compare Two "Disease" Outcomes? |

Date |
Fri, 19 Jun 2009 08:05:12 +0200 |

Dear Emily, a possible reference for the topics you're interested in is Fleiss JL, Levin B, Paik CM. Statistical methods for Rates and Proportions. 3rd edition. Chichester: Wiley, 2003. Sorry I cannot be more helpful. Kind Regards, Carlo -----Messaggio originale----- Da: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Per conto di Emily Putnam-Hornstein Inviato: giovedì 18 giugno 2009 7.06 A: statalist@hsphsun2.harvard.edu Oggetto: st: Can I Use Rate Ratios to Compare Two "Disease" Outcomes? I wish to make comparisons between injury death rates and rates of child maltreatment. I have computed age-specific injury death rates per 100,000, Rate Ratios (RR) and 95% confidence intervals using the Stata command "ir". Similarly, I have computed maltreatment rates per 1,000, RR, and confidence intervals for these same age and race groups (and during the same period). For example (white is the reference group): ir deaths black pop, by(agecat) ir subs black pop, by(agecat) Now, I would like to compute a ratio of the maltreatment rate to the rate of death for a given age/race group (I am exploring the all-cause injury death rate as a proxy for child welfare service needs). In other words, I would like to examine the association between maltreatment rates and death rates, within race. To accomplish this, I have used the "iri" command, entering the population count twice (since the same age/race population was exposed to both maltreatment and death in a given year). For example, having computed black to white RR for deaths and maltreatment above, I now compute a RR of maltreatments to deaths for each race/age group combination: black infants: iri subs deaths pop pop Are there any obvious problems with this method from a statistical standpoint? Can I consider the confidence intervals to be valid? Any other suggestions for how I might compare these two rates? I've explored some epidemiology text books, but haven't identified anything relevant. Any thoughts/suggestions would be very welcome. Thank you. Emily * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Can I Use Rate Ratios to Compare Two "Disease" Outcomes?***From:*"Emily Putnam-Hornstein" <eputnamhornstein@berkeley.edu>

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