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Table 2 Length according to gender and age for children exclusively breastfed compared with the standards

From: Anthropometric indices and exclusive breastfeeding in the first six months of life: a comparison with reference standards NCHS, 1977 and WHO, 2006

Age (months) Boys (mean length, cm) Girls (mean length, cm)
Number Observed (±SD) NCHS,1977 (p-value)* WHO,2006 (p-value)* Number Observed (±SD) NCHS,1977 (p-value)* WHO,2006 (p-value)*
Newborn 163 49.2 (1.8) 50.5 (<0.001) 49.9 (0.001) 178 48.7 (1.9) 49.9 (<0.001) 49.1 (0.006)
One 29 54.5 (1.5) 54.6 (0.828) 54.7 (0.580) 31 54.1 (1.7) 53.5 (0.118) 53.7 (0.365)
Two 25 58.4 (2.2) 58.1 (0.895) 58.4 (0.395) 35 57.9 (1.7) 56.8 (0.001) 57.1 (0.014)
Three 27 61.9 (2.2) 61.1 (0.084) 61.4 (0.264) 33 60.6 (2.5) 59.5 (0.055) 59.8 (0.168)
Four 34 64.2 (2.2) 63.7 (0.393) 63.9 (0.728) 26 62.3 (2.2) 62.0 (0.373) 62.1 (0.491)
Five 27 65.3 (2.2) 65.9 (0.202) 65.9 (0.202) 33 63.5 (2.2) 64.1 (0.068) 64.0 (0.111)
Six 34 67.5 (2.0) 67.8 (0.601) 67.6 (0.888) 26 66.8 (1.6) 65.9 (0.014) 65.7 (0.003)
  1. g Grams, SD Standard deviations
  2. * Student’s t-test for two means