Table 1 Study characteristics.
Characteristics | Mean | SD |
|---|---|---|
Participants (n = 656) | ||
Age (years)a | 31.51 | 5.87 |
n | % | |
|---|---|---|
Sexa | ||
Female | 273 | 42.66 |
Male | 367 | 57.34 |
Sample sizeb | ||
Experimental group | 438 | NA |
Control group | 435 | NA |
Study (n = 21) | ||
Type of shift work | ||
Rotating shift | 7 | 33.33 |
Night shift | 14 | 66.67 |
Simulated shift | ||
Yes | 12 | 57.14 |
No | 9 | 42.86 |
Treatment period | ||
Day only or mixed time | 10 | 47.62 |
Night only | 11 | 52.38 |
Research design | ||
Randomized controlled trial | 9 | 42.86 |
Randomized crossover trial | 12 | 57.14 |
Use of intention-to-treat analysis | ||
Intention-to-treat | 10 | 47.62 |
Per protocol | 11 | 52.38 |
