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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Survey - raking - calibration - post stratification - calculating weights |

Date |
Sat, 6 Dec 2008 11:03:56 -0500 |

--

-Steve

questionaire.

On Dec 6, 2008, at 5:32 AM, Kristian Wraae wrote:

Hello all I have a question regarding how to weight a data set. The data is from a population based cross sectional study.5000 randomly selected men reflecting the backgound population weremailed aquestionaire.75% responsrate. 3750 questionnaires filled out. We know the ageand the zipcode for non-responders.The questionnaire contained several sociodemographic parameters s1,s2,..... Sn Then 1845 men from the group that had filled out a questionnaire wereinvited to take part in a scientific project. The men were randomlyselectedwith an equal number in each age group (15 age groups of one year intervals). So 123 men in each group.946 men accepted a telephone call. 768 men never responded and 131refusedto be interwied on telephone.864 men of the 946 were then randomly contacted with equal numbersin eachage group and 697 men agreed to take part in the project. 97 men later cancelled or never showed up. So 600 men were included for further studies.Now I would like to weight these 600 men so they reflect thebackgroundpopulation in order to estimate the distribution of differentmeasures inthe background population (X1, X2, .... Xi) based on measuresamongst the600 men (Y1, Y2, ..... Yi). How do I do this?As far as I can tell I need to compensate for the differencesbetween the5000 and the 3750 and between the 3750 and the 600. Since the 1845wererandomly selected and an equal number in each age group werecontacted Iassume that all men had an equal probability of being included sodesignweights are not really needed. Right? But how do I compute a pweight that takes the two steps into account?I have looked a bit a the SURVWGT command in stata but I don'tunderstandit. Could someone help me with some examples. Thanks Kristian * * 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/

**Follow-Ups**:**SV: st: Survey - raking - calibration - post stratification - calculating weights***From:*"Kristian Wraae" <Kristian_Wraae@vip.cybercity.dk>

**References**:**st: Survey - raking - calibration - post stratification - calculating weights***From:*"Kristian Wraae" <Kristian_Wraae@vip.cybercity.dk>

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