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General Parenting Discussion
Reply to "When did your 99th percentile kid stop growing? "
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[quote=Anonymous]Being the 99th percentile at birth means that they are in the 99th percentile at birth. It doesn’t mean that they will stay along that curve. The curve doesn’t represent any child’s growth pattern. It is a curve that was artificially smoothed and fitted to represent the percentile values over the years. For example, this is a simplification, but the way the curves were developed can be thought of like this - in a study of 500 participants, the 99th percentile data point at age 4 weeks might be composed of study participants A, B, C, D and X. The 99th percentile data point at age 6 months might be composed of study participants B, G, F, H, and X. The study doesn’t track participant A over time. It tracks the 99th percentile at each time point. It’s true that kids who started at the 25th percentile are more likely to end up there than kids who started at the 75th percentile, but the graph gives zero information about that likelihood. [/quote]
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