Morning Cortisol Levels and Perceived Stress in Irregular Shift Workers Compared with Regular Daytime Workers

Table 2

Associations of the studied items with the ratio of salivary cortisol level 60 minutes (T1) after awakening to salivary cortisol level immediately (T0) after awakening (T1/T0 ratio).

𝑛=131	𝛽	SE	𝑃 value
Severe stress	0.48	0.21	<0.05
Shift work	0.73	0.13	<0.001
Actual sleep time	−0.15	0.07	<0.05
Gender (female)	0.20	0.12	NS
Age	−0.01	0.01	NS

Multiple linear regression. Adjusted 𝑅²=0.321.