I'm afraid that the only way of reliably calculating MoM is using data generated from the same method and lab.
I would strongly advise against using a 'generic' MoM regression equation or one from a different lab. Differences between labs and methods (and in some cases even lot numbers of the same method) are too large.
You should send the sample to a suitable screening lab for analysis.
Steve
> Date: Tue, 18 Jan 2011 17:00:17 +0000
> From: [log in to unmask]
> Subject: Multiple of Median
> To: [log in to unmask]
>
> I need input regarding calculation of Multiple of Median for risk evaluation. History is as follows
>
> A patient 28 years old - G2P1 - with previous history of cessarian section with outcome of 3.4 kg female with microcephaly, low set ears and high arch palate.
> In present pregnancy the 18 weeks triple test results are as follows.
>
> Beta HCG 17991 ----- IU/ml
> Alpha Fetoprotein 17 ------ IU/ml ( upto 7,0 in non pregnant as per report.
> Estradiol 1861 ------- pg/ml
>
> Ultrasonography findings reveal no significant findings.
>
> We do not have any data of MoM in our population and no such software available.
>
> Calculation MoM is required and how it can be processed in such situation.
>
>
> Dr.Asim Mumtaz
> Consultant Chemical Pathologist
>
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