Question 4: How are the effects of the sampling method shown in the scatter diagram for glucose?
 
The sampling method drops everyone below 5.5 mmol/L who is not diabetic. This is clearly seen in the diagram. Low glucose measurements are missing for non-diabetic subjects. The only measurement below 5 mmol/L are those for a couple of diabetic subjects.
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Last updated: 1 March, 2007.