Skip to main content

Table 2 Analysis of variance results for the time courses of salivary melatonin secretion

From: Can tryptophan supplement intake at breakfast enhance melatonin secretion at night?

 

p value

F value(df)

Partial η 2 value

Main effect of TRP

.139

2.55(1, 11)

.188

Main effect of light

.099

3.25(1, 11)

.228

Main effect of time

<.001

25.62(1.81, 19.93) a

.700

Interaction between TRP and light

.391

0.80(1, 11)

.068

Interaction between TRP and time

.111

2.49(1.85, 20.36) a

.184

Interaction between light and time

.118

2.09(3.08, 33.90) a

.160

Interactions between TRP, light, and time

.342

1.16(4.05, 44.54) a

.095

  1. aThe degrees of freedom were modified using the Greenhouse–Geisser method because the assumption of sphericity was not met
  2. TRP tryptophan