dhis2-users team mailing list archive

[Jim Grace <jimgrace@xxxxxxxxx>]

Hi João,

To compare a data element's value with the previous month, create a
validation rule of type "Surveillance", period type "Monthly", set the
"Sequential sample count" to 1, and leave the "Annual sample count" blank
(or zero.)

Then when you reference the data element on the left side of the equation,
it refers to the value for the current month. When you reference it on the
right side, it refers to the value in the previous month. For example if
you are looking at June 2015 data, the June 2015 data will be used on the
left side of the equation, and May 2015 data will be used on the right side.

If you wanted to compare the data element's value with the average value of
the previous (n) months, put the count (n) into the "Sequential sample
count". For example, if you set Sequential sample count to 2 and are
looking at June 2015 data, then June 2015 data will be used on the left
side of the equation, and the average value between April and May 2015 will
be used on the right side.

I hope this helps. Let me know if you have any other questions.

Cheers,
Jim


On Wed, Jul 15, 2015 at 6:35 AM, Joao Mazuze <Joao_Mazuze@xxxxxxxxxxxx>
wrote:

>  Dear all,
>
> I need to compare values between previous and current month for the same
> data element, I know that one solution is to create a surveillance rule,
> but seems not working as it is always successfully validate, can anyone
> explain me how this works? May be the problem is how am defining the  “*sequential
> sample count”*, as explained bellow, I do not understand well what this
> means.
>
>
>
> ·        Enter a *Sequential sample count*. This is the number of time
> periods immediately preceding against which you wish to compare the data.
> For example, if the period type is *Weekly* and this count is 2, the
> current data will be compared with past data averaged over each of the 2
> previous weeks.
>
> Kind regards,
>
> João
>
>
>
>
>
>
>
> Kind regards
>
> _____________________________________
>
> João Gabriel Mazuze
>
> National Database Manager
>
> Projecto CHASS-SMT
>
> Abt Associates Inc.
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>
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> www.chasssmt.com
>
>
>
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>
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> Primários de Saúde e outros a ele relacionados em coordenação com as
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> qualidade dos Serviços de Saúde no país.*
>
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