Table 3.
Description of sleep variables according to gender and work shift, of workers in southern Brazil (n: 130)
| MCTQ | General | Women | Men | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Day | Night | p-value | Day | Night | p-value | Day | Night | p-value | |
| Sleep midpoint working days (hours) | 3:41 (2:48 to 4:31) | 5:30 (4:09 to 10:30) | < 0.001** | 3:45 (2:47 to 4:27) | 4:45 (4:09 to 10:17) | < 0.001** | 3:38 (2:47 to 4:38) | 9:25 (5:07 to 12:38) | < 0.001** |
| Sleep duration working days (hours) | 7:03 ± 1:39 | 6:00 ± 2:27 | 0.007* | 7:11 ± 1:48 | 6.09 ± 2:39 | 0.040* | 6:57 ± 1:20 | 5:50 ± 2:20 | 0.080* |
| Sunlight working days (hours) | 1:00 (0:18 to 2:00) | 1:00 (0:25 to 3:00) | 0.433** | 1:00 (0:30 to 2:00) | 2:00 (0:40 to 3:00) | 0.081** | 2:00 (1:00 to 3:30) | 1:00 (0:45 to 3:08) | 0.262** |
| Sleep midpoint days off (hours) | 4:47 (4:03 to 5:42) | 4:30 (3:48 to 5:53) | 0.772** | 4:50 (3:40 to 6:00) | 4:30 (4:00 to 5:40) | 0.650** | 4:40 (4:08 to 5:30) | 4:57 (3:06 to 6:21) | 0.783** |
| Sleep duration days off (hours) | 8:10 ± 1:59 | 7:40 ± 2:12 | 0.046** | 8:18 ± 2:21 | 7.54 ± 2:14 | 0.111** | 8:01 ± 1:45 | 7:09 ± 2:18 | 0.191** |
| Sunlight days off (hours) | 3:00 (2:00 to 5:00) | 3:00 (1:09 to 4:09) | 0.168** | 2:45 (2:00 to 4:53) | 2:30 (1:00 to 5:00) | 0.741** | 4:00 (3:00 to 6:30) | 3:00 (1:11 to 4:00) | 0.048** |
| Social jetlag | 1:03 (0:06 to 1:56) | − 0:27 (− 6:26 to 0:06) | < 0.001** | 1:00 (0:00− 2:17) | 0:00 (− 5:47 to 0:12) | < 0.001** | 1:15 (0:30− 1:45) | − 1:30 (− 7:50 to 0:05) | < 0.001** |
| Does not use alarm clock on days off | 59 (85.5) | 35 (62.5) | 0.006## | 40 (85.1) | 26 (65.0) | 0.053## | 19 (86.4) | 9 (56.3) | 0.088## |
| Awakes with the alarm clock | 26 (52.0) | 7 (24.1) | 0.029## | 18 (54.5) | 4 (20.0) | 0.029## | 8 (47.1) | 3 (33.3) | 0.797## |
* Student t test; ** Mann–Whitney test
##Pearson’s Chi Square test with continuity