T H E U S E O F A P R E D I C T I O N M O D E L T O P R E V E N T A B N O R M A L W E I G H T I N C H I L D H O O D I N T H E Y O U T H H E A L T H C A R E P R A C T I C E Table 4: Mean birth weight, mean weight at the age of 1 year, mean PI at the age of 1 year, mean differ-‐ ence of PIm and PIe at the age of 1 year, corresponding standard deviations, 95% confidence in-‐ terval and significance for the overweight-‐ and control group. Overweight Not overweight CI 95 % p Mean birth weight (gr) 3441.64 ± 548.34 3373.63 ± 532.63 -‐75.63 – 211.65 0.35 Mean weight at the age of 1 year (gr) 10959.07 ± 1351.37 9922.65 ± 1135.33 705 – 1367.84 < 0.0001 Mean PI at the age of 1 year 2.36 ± 0.24 2.19 ± 0.20 0.11 – 0.23 < 0.0001 Mean difference, PIm and PIe 0.16 ± 0.28 0.00 ± 0.28 0.09 – 0.23 < 0.0001 at the age of 1 year PI = Ponderal Index, PIe= Expected Ponderal Index, PIm = Measured Ponderal Index, CI = Confidence Interval, p = Significance, gr = Grams. Table 5 shows an example of the course of the PI values of an individual child until the age of 1 year. In Figure 2, the graph of these values is shown. The child has a PI at birth of 2.71. Following the above mentioned formula this child has a PIe at the age of 1 year of 2.27. Taken the range of 2SD (based on the total population) into account, the PIe range of this individual will be 2.12-‐2.42 (as shown in Figure 2) at the age of 1 year. The child appears to have a PIm at 1 year of 2.64 (as shown in Fig-‐ ure 2). According to our prediction model, this child is at risk of becoming over-‐ weight. Table 5: The PIm and the PIe range (2SD) of an individual child are calculated at different ages until the age of 1 year. Age (months) PIm PIe range 0 2.71 2.71 ± 0.15 3 2.74 2.61 ± 0.15 5.3 2.7 2.52 ± 0.15 9 2.71 2.39 ± 0.15 12 2.64 2.27 ± 0.15 97
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