Table 2.
Demographic characteristics of the studied sample.
| Authors (year) | Sample (n) | Mean age (SD) | Gender | Marital status | Work shift | ||
|---|---|---|---|---|---|---|---|
| M | F | Single | Married | ||||
| Jung & Lee (2016)14 | 1.431 | 27,8 (4,67) | 28 (2%) | 1.403 (98%) | 1.141 (80%) | 290 (20%) | Rotating with 4.9-night shifts per month |
| Gumenyuk et al (2015)15. | 37 | 35,41 (9,35) | 14 (38%) | 23 (62%) | NI | NI | Night work |
| Yazdi et al. (2012)17 | 160 | 31,3 (5,3) | 0 | 160 (100%) | 75 (47%) | 85 (53%) | Night and rotating work |
| Ursin et al. (2009)16 | 7.782 (2.046 shift workers) | 40 a 45 | 3.264 (42%) | 4.518 (58%) | NI | NI | Night work and watches |
| Takahashi et al. (2008)18 | 731 (509 shift workers) | 33,6 (11,1) | 162 (22,2%) | 569 (77,8%) | NI | NI | Rotating two-shift system; rotating three-shift system; other system * |
Abbreviations: NI: Not informed;
*
Night duty or on-call.