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. 2017 Jul 26;7(7):e013412. doi: 10.1136/bmjopen-2016-013412
All Sway to neutral pattern Flat pattern Hyperlordotic pattern
Mean (SD) Mean (SD) Mean (SD) Mean (SD)
Boys, n=1101
 Weight
  Birth, g 3198.9 (516.1) 3229.3 (491.0) 3064.1 (600.0) 3189.3 (519.0)
  4 years, kg 17.8 (2.6) 17.9 (2.6) 17.3 (2.3) 18.4 (1.6)
  7 years, kg 25.8 (4.7) 26.0 (4.8) 24.5 (3.9) 26.9 (4.1)
 Length/height, cm
  Birth 48.9 (2.5) 49.1 (2.3) 48.2 (3.1) 48.2 (2.9)
  4 years 105.3 (4.5) 105.5 (4.5) 104.8 (4.6) 105.4 (3.3)
  7 years 123.9 (5.3) 123.9 (5.4) 123.3 (5.3) 125.0 (5.4)
 Ponderal index/BMI
  Birth, 100×(g/cm3) 2.71 (0.27) 2.71 (0.27) 2.70 (0.28) 2.85 (0.36)
  4 years, kg/m2 16.00 (1.49) 16.06 (1.52) 15.71 (1.32) 16.55 (1.26)
  7 years, kg/m2 16.70 (2.19) 16.85 (2.24) 16.00 (1.79) 17.19 (1.98)

BMI, body mass index.