| Year/Group | 
        Mean Birth 
          Weight (g) | 
        Weight (g) at 
          Initial Disposition | 
       
      
        | 2009 | 
          | 
          | 
       
      
        |  HFT centers | 
        1005 | 
        2200 | 
       
      
        |  VON database | 
        1047 | 
        2221 | 
       
      
        | 2010 | 
          | 
          | 
       
      
        |  HFT centers | 
        1024 | 
        2247 | 
       
      
        |  VON database | 
        1048 | 
        2245 | 
       
      
        | 2011 | 
          | 
          | 
       
      
        |  HFT centers | 
        1022 | 
        2168 | 
       
      
        |  VON database | 
        1055 | 
        2255 | 
       
      | 
  
  
    | HFT: High flow therapy; VON: Vermont Oxford Network. | 
  
  
    | Table 2: Mean birth weight distribution by year. |