Skip to main content

Table 1 The four experimental groups

From: Effects of tryptophan-rich breakfast and light exposure during the daytime on melatonin secretion at night

Group Poor*Dim Rich*Dim Poor*Bright Rich*Bright
Number of subjects 10 7 9 7
Age (years)*1 22.1 (4.6) 21.4 (2.5) 21.0 (2.4) 21.4 (2.1)
Height (cm)*1 170.9 (6.1) 175.1 (5.1) 173.1 (4.0) 174.3 (6.3)
Weight (kg)*1 57.7 (5.6) 62.1 (7.4) 64.1 (7.1) 62.0 (5.8)
BMI*1 19.9 (2.3) 20.3 (2.9) 21.2 (1.9) 20.6 (2.5)
Tryptophan content of breakfast Poor*2 Rich*3 Poor*2 Rich*3
Lighting condition during the daytime Dim*4 Dim*4 Bright*5 Bright*5
  1. *1Mean (SD) is shown for age, height, weight, and BMI.
  2. *2Tryptophan content of 55 mg.
  3. *3Tryptophan content of 476 mg.
  4. *4< 50 lx between 07:30 h and 18:00 h.
  5. *5> 5,000 lx between 07:30 h and 18:00 h.