[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

From |
ssamuels@albany.edu |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Child mortality rates using D |

Date |
Wed, 11 Mar 2009 21:19:56 -0400 (EDT) |

- [My last posts have not gone through, so I am sending this one from a new wemail Statalist address. I apologize for the duplication if earlier posts also appear.--Steve] Satvika- Why do your results differ? Perhaps because you did not duplicate the definitions or calculations that DHS uses. See: http://www.measuredhs.com/help/Datasets/Infant_and_Child_Mortality.htm especially http://www.measuredhs.com/help/Datasets/Mortality_Rate_Calculation.htm To define neonatal mortality, for example, Measure DHS does not use 28 days, but 30 days. Also it does not use seven day intervals. Instead, it computes numerator and denominator for the period 0-30 days. It then subtracts from the denominator 1/2 for each child born <30 days prior to the five years which precede the survey. You must define these births as censored, and use -ltable-, not -stlist-. To allow children still alive after 30 days to contribute fully to the denominator, you must have age intervals after 30 days in your analysis. Censoring patterns for ages >30 days are more complicated, as the second web page shows. Your code might also have excluded some observations unnecessarily, because while Measure DHS imputes missing values, the imputed values may not always be exact dates. Perhaps the study code book will enlighten you. On the web pages referenced, there is no mention of weighting, but I would guess that the counts are weighted. Good luck! -Steve On Mar 9, 2009, at 6:11 AM, Satvika Chalasani wrote: Hello Statalisters, I am trying to reproduce the neonatal/infant/under-5 mortality rates shown in the Demographic and Health Survey reports, particularly for the Indian surveys. Now DHS does provide SPSS and SAS modules to calculate mortality rates their way but not a Stata module. I am using sts list to calculate failure functions, and in two surveys I come close to the published rates but in one I don't. ltable seems even less accurate. Does anyone have a routine that they would be willing to share? Or any thoughts? My code: gen ageatexit=. replace ageatexit=(interviewdate-dateofbirth) if childalive==1 replace ageatexit=(dateofdeath-dateofbirth) if childdied==1 preserve stset ageatexit [pw=weight], failure(neonatal) id(caseid) exit(t 28) stsplit dur, every (7) gen neonatal_d=0 if _d~=. replace neonatal_d=1 if _d==1 sts list, failure restore Thank you! Satvika Chalasani Graduate student Penn State University * * 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/

**Follow-Ups**:**Re: st: Child mortality rates using D***From:*"Satvika Chalasani" <satvika@pop.psu.edu>

- Prev by Date:
**st: Re: save coeff estimators of Arima model with foreach** - Next by Date:
**Re: st: Child mortality rates using D** - Previous by thread:
**Re: st: Re: Generate Variable** - Next by thread:
**Re: st: Child mortality rates using D** - Index(es):

© Copyright 1996–2017 StataCorp LLC | Terms of use | Privacy | Contact us | What's new | Site index |