Depression is complicated.

For depression 1 the prevalence adjustment is made on the total number 
of patients who are eligible for screening i.e. the combined total of 
diabetics, patients with CHD etc. I call this DEP PREV 1 on my site.

For the two indicators involving PHQ9s then the prevalence adjustment is 
based on the number of patients who have depression coded ever in their 
notes (or at least those without a "depression resolved" code). This is 
my DEP PREV 2

You can calculate the incidence of depression using the denominator of 
the PHQ9 searches (sort of - these searches are rather complex also). I 
calculate this and call it DEP PREV

See how it looks : http://www.gpcontract.co.uk/browse/UK/Depression/11

Next year (i.e. 2012-13) the PHQ9 indicators will indeed be adjusted by 
the depression incidence.

-- 
Gavin


On 28/11/2011 17:15, Mary Hawking wrote:
> Isn't DEP related to new depression only?
> If so, shouldn't "prevalence" be called "incidence" for this disease
> category ?
>
> Mary Hawking
> "thinking - independent thinking - is to humans as swimming is to cats: we
> can do it if we really have to."  Mark Earles on Radio 4.
>
>
>
> -----Original Message-----
> From: GP-UK [mailto:[log in to unmask]] On Behalf Of Saul Galloway
> Sent: 28 November 2011 16:49
> To: [log in to unmask]
> Subject: Re: QOF and prevalence
>
> Thanks Tim, yes, the list size bit I understood.
>
> I looked on http://www.qof.ic.nhs.uk/ but didn't see any prevalence
> for depression, whats the story there? Studies suggest prevalence of
> around 10% but there is no way we are identifying and treating
> anything like that number, and there is certainly not the capacity to
> push 5% of the population into appropriate Rx for "mild" available
> locally.
>
> On 28 November 2011 16:34, Walter Tim (FALKLAND SURGERY)
> <[log in to unmask]>  wrote:
>> That looks right, but you also need to factor in list size so * List
> size/Av List size (around 5583 last time I checked)
>> --
>> Tim (work email)
>> Falkland Surgery Monks Lane Newbury RG14 7DF
>> Tel 01635 279972    Fax 01635 279973
>> In surgery most days
>> ________________________________________
>> From: GP-UK [[log in to unmask]] On Behalf Of Saul Galloway
> [[log in to unmask]]
>> Sent: 28 November 2011 16:23
>> To: [log in to unmask]
>> Subject: QOF and prevalence
>>
>> I've been trying to confirm something re QOF and prevalence. There
>> used to be a square root Adjusted Practice Disease Factor applied,
>> which if i remember stopped in 2009. Is it now simply
>>
>> Average pounds per point (say 130) * practice prevalence/ average
>> England prevalence = indicator pounds per point
>>
>> ?
>>
>>
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