Table 1 Socio-demographic, work schedule variables, and sickness absence characteristics
From: Cumulative exposure to shift work and sickness absence: associations in a five-year historic cohort
Characteristic | Number | Percentage | |
|---|---|---|---|
Age, mean (SD) [range] | 7562 | 45.4 (8.0) [22–63] | |
Gender | Male | 6167 | 81.6 |
Female | 1395 | 18.4 | |
Marital status | Married/cohabiting | 5667 | 74.9 |
Single | 1355 | 17.9 | |
Divorced/Widow | 540 | 7.1 | |
Children | No | 2121 | 28.0 |
Yes | 5441 | 72.0 | |
Employment duration (in months), mean (SD) [range] | 7562 | 18.9 (9.2) [4–45] | |
Contract rate 2009 | 0 to 50% | 299 | 4.0 |
51 to 80% | 1178 | 15.6 | |
81 to 99% | 498 | 6.6 | |
100% | 5587 | 73.9 | |
Working overtime | No | 2266 | 30.0 |
Yes | 5296 | 70.0 | |
Knowledge requirements, mean (SD) [range] | 7562 | 34.6 (13.0) [0–90] | |
Special operational requirements, mean (SD) [range] | 7562 | 9.6 (4.0) [0–18] | |
Aggravated working conditions, mean (SD) [range] | 7562 | 9.4 (6.0) [0–22] | |
Shift type group | Day work | 1060 | 14.0 |
Three-shift schedule | 3232 | 42.7 | |
Two-shift schedule | 1615 | 21.4 | |
Transfer out of three-shift | 425 | 5.6 | |
Transfer into three-shift | 595 | 7.9 | |
Other kind of transfer | 635 | 8.4 | |
Number of night shifts 2005–2008 | No night shifts | 2837 | 37.5 |
Night shifts (1 to ≤46) | 1589 | 21.0 | |
Night shifts (47 ≤ 110) | 1572 | 20.8 | |
Night shifts (>110) | 1564 | 20.7 | |
Number of sickness absence days in 2009, mean (SD) [range] | 7562 | 26.6 (45.5) [0–365] | |
Number of sickness absence episodes in 2009, mean (SD) [range] | 7562 | 1.7 (1.5) [0–13] | |
Long-term sickness absence (>7 days) | No | 3886 | 51.4 |
Yes | 3676 | 48.6 | |