Table 2.
Analysis of delta cortisol, delta melatonin and sleep-related variables between day-shift and night-shift workers in southern Brazil (n=36).
| Variables | Day-shift | Night-shift | p-value |
|---|---|---|---|
|
Sleep duration, working day Raw |
6.66 (6.22; 7.15) | 3.68 (3.07; 4.41) | 0.000 |
| Adj | 6.42 (5.91; 6.87) | 3.94 (3.32; 4.65) | 0.000 |
| Midpoint of sleep, working day | |||
| Raw | 2.98 (2.64; 3.4) | 11.16 (9.84; 12.14) | 0.000 |
| Adj | 3.47 (2.79; 4.8) | 10.74 (8.84; 12.18) | 0.000 |
| Sleep duration, free day | |||
| Raw | 8.65 (8.03; 9.35) | 7.57 (6.61; 8.4) | 0.072 |
| Adj | 9.2 (8.4; 10.17) | 6.97 (5.68; 8.14) | 0.003 |
| Midpoint of sleep, free day | |||
| Raw | 4.07 (3.7; 4.44) | 4.3 (3.55; 5.00) | 0.554 |
| Adj | 4.26 (3.73; 4.73) | 4.19 (3.39; 4.87) | 0.896 |
|
Jet lag Raw |
>1.17 (0.64; 1.59) | -6.21 (-8.08;-3.76) | >0.000 |
| Adj | 0.97 (-0.21; 1.74) | -6 (-7.83;-3.89) | 0.000 |
|
Delta cortisol Raw |
>0.76 (0.55; 1) | 0.37 (-0.03; 0.81) | >0.121 |
| Adj | 0.56 (0.32; 0.8) | 0.56 (0.16; 1.01) | 0.986 |
|
Delta melatonina Raw |
>3.68 (-3.33; 11.39) | -2.42 (-10.02; 3.02) | >0.249 |
| Adj | 6.91 (-1.15; 17.63) | -5.18 (-14.65; 2.38) | 0.075 |
Notes: Raw: Results by Student t-test; Adj: Results by ANCOVA adjusted by alcohol; 95%CI obtained with 1,000 bootstrap resamples.