[ddj] Graphing Obesity (Body Mass Index >30) vs Gross National Income per capita - Feedback needed

[Roberto Belo Rovella]

> Hello, my name is Roberto Belo and I work for the BBC World Service. I
> need your statistics expertise on the project we are working on.
> 
> We are looking into a set of data provided by the WHO, which we
> complemented with GNI per capital (Atlas method) from the World Bank:
> http://bit.ly/kF6fyr . We are just looking at the period from 1980 to
> nowish, with data from 1980 (except for Russia), 1990, 2000 and 2008.
> 
> We are trying to show the relation between a higher income and the
> increase in Obesity (% of population with BMI bigger than 30),
> especially focusing on the G7 countries on one side, and on the BRICS
> countries (Brazil, Russian, India, China, South Africa) on the other.
> 
> 1) Originally we produced this graphic, showing the variation of
> Obesity vs GNI per Capita, and as the variations within the years seem
> to be linear, we just included 1980 and 2008 (except for Russia, we
> took it from 2000) - NB Just focus on the graphic, the rest is
> furniture.
> 
>  <<obesity_bmi_v_gni.png>> 
> This shows that the increase in obesity cases have been steeper in
> BRICS countries than in G7 ones.
> 
> 2) This one shows Obesity vs the % variation of GNI per Capita - and
> here the picture seems to change radically, with a mixed picture.
> 
>  <<obesity_bmi_v_percent_increase_gni.png>> 
> 3) Finally, this one, which shows the % variation in Obesity vs the %
> variation of GNI per Capita - which I think falls into very muddy
> waters, but hey, the designer was very enthusiastic
> 
>  <<obesity_percent_increase_bmi_v_percent_increase_gni.png>> 
> Given all these, would someone be able to shed some light into which
> of these three options would be the most honest and statistically
> correct way of showcasing the data - and why?
> 
> Otherwise, if you could point me in the direction of someone who would
> be able to make total sense of this, I would be very grateful.
> 
> We have been putting a lot of effort in getting data journalism into
> the agenda, and we can't afford a mistake in this presentation.
> 
> Thanks a lot.
> 
> Roberto
> 
> Roberto Belo-Rovella | BBC WS Future Media Editorial
> Room 500NE, Bush House, London WC2B 4PH
> Phone: +44 20 755 70611 (Ext: 02 70611)
> E-mail: roberto.belo at bbc.co.uk
> 

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