Table 2.
Background characteristics of participants
| Intervention-ICU (n = 55) | Control-ICU (n = 58) | p b | |||
|---|---|---|---|---|---|
| Median | Rangea | Median | Rangea | ||
| Age | 43 | (35–50) | 42 | (36–53) | 0.74 |
| Years employed in the ICU | 10 | (4–20) | 10 | (5–21) | 0.40 |
| Work hours per week | 37 | (33–37) | 34 | (32–37) | 0.44 |
| Number of shifts per monthc | 8 | (6–10) | 7 | (5–8) | 0.02 |
| N | % | N | % | p d | |
|---|---|---|---|---|---|
| Live with partner | 46 | (84) | 47 | (81) | 0.72 |
| Children living at home | 36 | (65) | 35 | (60) | 0.57 |
| Shift type | <0.001 | ||||
| Day/evening | 11 | (20) | 23 | (40) | |
| Day/evening/night | 10 | (18) | 22 | (39) | |
| Day/night | 27 | (49) | 11 | (19) | |
| Only evening | 5 | (9) | 0 | ||
| Only night | 2 | (4) | 1 | (2) | |
| Years with shift work | 0.69 | ||||
| <1 year | 1 | (2) | 1 | (2) | |
| 1 to <10 years | 26 | (47) | 23 | (40) | |
| 10 to <20 years | 18 | (33) | 18 | (31) | |
| 20 years or more | 10 | (18) | 16 | (28) | |
aInterquartile range
bMann–Whitney U test
cExcluding those working full time evening or night
dChi-square test or Fischer’s exact test where appropriate