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Table 6 Birth weight means and standard deviations for each developmental milestone onset age by birth weight category

From: Birth and developmental correlates of birth weight in a sample of children with potential sensory processing disorder

Birth weight category Developmental milestone Mean onset age in months (standard deviations); n # Premature; # late pre-term (34 to 36 weeks) Birth weight means in grams (standard deviations)
ELBW Rolling 5.50 (3.53); 0 2; 0 765.42 (200.46)
  Sitting 8.00 (1.41); 0 2; 0  
  Crawling 10.50 (0.71); 0 3; 0  
  Walking 13.00 (1.73); 0 3; 0  
  Solids 10.50 (2.12); 0 2; 0  
  Words 24.00 (8.49); 0 2; 0  
  Sentences 54.00 (0); 0 1; 0  
VLBW Rolling 3.80 (0.84); 0 5; 1 1264.37 (157.33)
  Sitting 8.00 (2.16); 0 4; 0  
  Crawling 9.58 (2.29); 0 6; 1  
  Walking 14.75 (2.25); 0 7; 1  
  Solids 9.67 (1.15); 0 3; 0  
  Words 15.79 (8.64); 0 6; 1  
  Sentences 24.60 (12.80); 0 4; 0  
LBW Rolling 5.55 (2.34);19 16; 8 2309.70 (193.98)
  Sitting 7.62 (1.62); 23 19; 10  
  Crawling 9.79 (2.64); 23 19; 9  
  Walking 15.17 (3.48); 28 24; 13  
  Solids 11.24 (4.25); 17 14; 8  
  Words 14.04 (7.08); 24 20; 9  
  Sentences 25.28 (12.08); 21 16; 6  
NBW Rolling 4.86 (2.20); 269 36; 13 3414.71 (369.67)
  Sitting 6.65 (1.60); 326 47; 14  
  Crawling 8.68 (2.56); 329 46; 15  
  Walking 13.39 (3.63); 455 71; 20  
  Solids 9.07 (3.73); 222 26; 6  
  Words 14.05 (6.89); 346 53; 15  
  Sentences 22.11 (9.80); 299 45; 10  
HBW Rolling 4.32 (1.73); 48 0; 0 4315.54 (280.37)
  Sitting 6.61 (1.89); 61 0; 0  
  Crawling 8.40 (1.86); 62 0; 0  
  Walking 13.05 (2.75); 85 0; 0  
  Solids 8.87 (3.84); 39 0; 0  
  Words 12.61 (5.23); 64 0; 0  
  Sentences 18.01 (7.74); 49 0; 0  
  1. NOTE: n’s for ELBW and VLBW are 0 because they did not contribute to the analyses.
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