Floating charts: Data plotting using free-floating acoustically levitated representations
Plotting using the new UK-WHO Growth Charts Presentation D
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Transcript of Plotting using the new UK-WHO Growth Charts Presentation D
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Measuring and Plotting
Plotting using the new UK-WHO Growth Charts
Presentation D
Adapted from training materials of the Royal College of Paediatrics and Child Health [RCPCH]
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Measuring and Plotting
Plotting the Chart• Record measurement and date in ink, plot in pencil
• Use a dot; do not join up
• Age errors are commonest source of plotting mistakes use a calendar or date wheel to calculate age– Age in weeks for first 6-12 months– Calendar months thereafter
• Count forward from the date of birth to current month using day birth e.g. if date of birth is 26/6/09, then age 13 months is on 23/7/10
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Measuring and Plotting
What do the Centiles Show?• Optimum range of weight and heights
• Describes the percentage expected to be below that line– 50% below 50th
– 91% below 91st
– 1 in 250 below 0.4th
• Half of all children should be between 25-75th centile
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Measuring and Plotting
Centile Terminology
If the point is exactly on the centile line, or within ¼ of a space of the centile line, the child is described as being ‘on the X centile’ (see A) e.g. on the 91st centile.
If not they should be described as being ‘between centile X and Y’ (see B) e.g. between the 75th -91st centile.
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Measuring and Plotting
Centile Spaces
A ‘centile space’ is the distance between two centile lines (e.g. C).
Two measurements can be described as a centile space apart if they are both midway between centiles (e.g. D).
Falls or rises should be expressed as multiples of centile spaces (e.g. a fall through 2 ½ centile spaces).
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Measuring and Plotting
Summary: Plotting and Centiles
• Record measurement and date in ink
• Plot one single dot in pencil-[no ‘fried eggs’, or joining up]
• Age errors are commonest source of plotting mistakes
• Centiles describes the percentage expected to be below that line
• A child is– on a centile if within ¼ space of line– between the two centiles if not on (or within ¼ space of) a centile
• A centile space is the distance between two centile lines
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Measuring and PlottingMeasuring and plotting: Activity 2 Answers
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Measuring and PlottingMeasuring and plotting: Activity 2 Answers
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Measuring and PlottingMeasuring and plotting: Activity 2 Answers