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Table 2 New Trp Index (mg) based on breakfast habits and validation

From: Can breakfast tryptophan and vitamin B6 intake and morning exposure to sunlight promote morning-typology in young children aged 2 to 6 years?

Corrected average Trp intake according to regularity of breakfast
  Eats at set times every day Almost every day
Aged 2 years   73.9 59.2    
Aged 3 to 5 years   83.8 62.4    
Corrected average Trp intake according to the frequency to take well-balanced breakfast that includes staple, main and side
  Everyday   4 to 5 days/week 2 to 3 days/week   0 to 1 days/week
Aged 2years 134.4   98.0 46.8   12.0
Aged 3 to 5years 139.1   93.4 50.2   13.5
Trp-Index for children aged 3 to 5 years(Trp intake )before and after the correction due to the frequency of a well-balanced breakfast
    Average after correction Average before correction
Eats at set times every day 83.8 125.5
Almost every day 62.4 116.5
Mann-Whitney U-test   z=-4.9,P <0.001 z=-2.7,P= 0.006