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From |
Steven Joel Hirsch Samuels <sjhsamuels@earthlink.net> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: How to calculate mortality ratios |

Date |
Mon, 3 Dec 2007 08:51:52 -0500 |

Okay, Gaby. Next, please describe how the sample was taken. What was the sampling 'frame'? What were the strata?; what was the 'first-stage' of sampling? What were later stages? In most household surveys, 'household' is rarely the first stage of sampling. Usually the strata are divided into smaller areas and a sample of these is taken. Only at a later stage are HH drawn.

How was the information collected? how did the survey ascertain characteristics of people who had died? What if they had lived alone? Who provided the causes of death?

-Steven

On Dec 3, 2007, at 6:02 AM, Ana Gabriela Guerrero Serdan wrote:

Dear Steve, I have two datasets. 1) One dataset has individual information for each individual in the household (individual characteristics) and also hh id, regions,pweights, psu, etc.. 2) However, deaths are in a separate dataset which includes only those individuals that died, it specifies: household id, region, gender, pweights, psu, and the causes of death. I want to calculate mortality ratios for each of the causes of death (e.g. disease, traffic accident) per region. So basically the hh id is the variable to know which individuals died in each household. So I think I need to first joinby both datasets, then calculate the population estimates per region and then mortality ratios? thanks, Gaby --- Steven Joel Hirsch Samuels <sjhsamuels@earthlink.net> wrote:Gaby, why don't you lay out exactly what your files are, and what analysis variables are in them. Do you want to do 'proportional' mortality ratios, single mortality rates? Do you want to test differences among regions (AI02)? -Steven On Dec 2, 2007, at 10:13 AM, Ana Gabriela Guerrero Serdan wrote:Steve, thanks. Yes sorry my ratio should have been x/y. I missed to calculate the total population firstasthis is in a separate file. I was doingcalculationsonly among those that died from different causes. So from file 2 I need to calculate my total population. I have individual information for each household in the survey. Not sure if I shouldfirstgenerate a count variable? svyset AI06 [pw= expweigh], strata( AI05) gen count=_n svy: total count, over(AI02) then use this to calculate the mortality ratio infile1 as you indicated. thanks again, Gaby --- Steven Joel Hirsch Samuels <sjhsamuels@earthlink.net> wrote:Gaby: 1. Ratio requires a numerator and denominator: svy: ratio myratio = x/y svy: ratio dead should return an errormessagein Stata 10. What are your individual observations? peoplewithdead indicating status yes/no, or some other unit? If you havean'area' as your observation, with 'dead' counting deaths and'pop'giving the population total for the area, then svy: ratio (mr= dead/pop) would work. 2. svy: prop death will give proportions deadandnot dead. This will be correct if your analytic unit is person. 3. I suggest that you form new strata by pooling singletons into neighboring regions. -Steven On Dec 2, 2007, at 8:25 AM, Ana Gabriela Guerrero Serdan wrote:Dear Stata Users, I have two related questions: 1) Im trying to calcuate mortality ratios for different sub-populations using survey data. Is it very naive from my side to use thefollowingcommands? svyset AI06 [pw= expweigh], strata( AI05) svy: ratio death, over (Province) I also get similar results with prop. 2) I dont get any SE because I have strata withonesampling unit. I see that Stata suggests (asalsosomebooks) to delete or collapse the strata with one sampling unit. Do you know what are theimplicationsfor this? Would I need to collapse the strata according to region? thanks, Gaby Gaby Guerrero Serdan Deparment of Economics Royal Holloway, University of London TW20 OEX Egham, Surrey England, UKhttp://www.rhul.ac.uk/economics/About-Us/postgrads.htmlhttp://www.flickr.com/photos/49939890@N00/ Tel: +44 7912657259____________________________________________________________________________________ Be a better pen pal. Text or chat with friends inside Yahoo! Mail.Seehow. http://overview.mail.yahoo.com/ * * For searches and help try: *http://www.stata.com/support/faqs/res/findit.html* http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/Steven Samuels sjhsamuels@earthlink.net 18 Cantine's Island Saugerties, NY 12477 Phone: 845-246-0774 EFax: 208-498-7441 * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/Gaby Guerrero Serdan Deparment of Economics Royal Holloway, University of London TW20 OEX Egham, Surrey England, UKhttp://www.rhul.ac.uk/economics/About-Us/postgrads.htmlhttp://www.flickr.com/photos/49939890@N00/ Tel: +44 7912657259______________________________________________________________________=== message truncated ===______________ Get easy, one-click access to your favorites. Make Yahoo! your homepage. http://www.yahoo.com/r/hs * * For searches and help try: *http://www.stata.com/support/faqs/res/findit.html* http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/Steven Samuels sjhsamuels@earthlink.net 18 Cantine's Island

Gaby Guerrero Serdan

Deparment of Economics

Royal Holloway, University of London

TW20 OEX

Egham, Surrey

England, UK

http://www.rhul.ac.uk/economics/About-Us/postgrads.html

http://www.flickr.com/photos/49939890@N00/

Tel: +44 7912657259

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Steven Samuels sjhsamuels@earthlink.net 18 Cantine's Island Saugerties, NY 12477 Phone: 845-246-0774 EFax: 208-498-7441 * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: How to calculate mortality ratios***From:*Ana Gabriela Guerrero Serdan <ag_guerreroserdan@yahoo.com>

**References**:**Re: st: How to calculate mortality ratios***From:*Ana Gabriela Guerrero Serdan <ag_guerreroserdan@yahoo.com>

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