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Table 3 Model error for the prediction of the 1–7-year GH growth response expressed in Dheight SD scores for the model group and the validation group separately: for the total group and subdivided into children born AGA or SGA.

From: The first-year growth response to growth hormone treatment predicts the long-term prepubertal growth response in children

Model group Validation group
Total group: n SDres SDstudRes Total group: n SDres SDstudRes
   1–2 year 162 0.17 1.00    1–2 year 205 0.19 1.11
   1–3 years 97 0.29 1.00    1–3 years 111 0.28 0.97
   1–4 years 53 0.38 1.00    1–4 years 58 0.35 0.90
   1–5 years 34 0.43 1.00    1–5 years 40 0.45 1.04
   1–6 years 17 0.48 1.00    1–6 years 29 0.40 0.84
   1–7 years 7 0.57 1.00    1–7 years 9 0.43 0.75
AGA:     AGA:    
   1–2 year 125 0.17 0.99    1–2 year 117 0.19 1.12
   1–3 years 69 0.28 0.96    1–3 years 63 0.26 0.90
   1–4 years 39 0.39 1.02    1–4 years 31 0.31 0.82
   1–5 years 21 0.44 1.03    1–5 years 18 0.39 0.92
   1–6 years 8 0.45 0.95    1–6 years 15 0.42 0.88
   1–7 years 7 0.57 1.00    1–7 years 3 0.26 0.45
SGA:     SGA:    
   1–2 year 37 0.18 1.05    1–2 year 88 0.19 1.09
   1–3 years 28 0.31 1.08    1–3 years 48 0.30 1.05
   1–4 years 14 0.36 0.93    1–4 years 27 0.37 0.98
   1–5 years 13 0.41 0.96    1–5 years 22 0.49 1.13
   1–6 years 9 0.50 1.04    1–6 years 14 0.37 0.79
   1–7 years 0 - -    1–7 years 6 0.49 0.87
  1. SDres = root mean square error of the residuals.
  2. SD stud Res = SDres/SDresModelgroup
  3. For a reliable model, the SDres should be similar, or lower, for the validation group compared with the SDres from the model group.