Table 1
Comparison of Day and Shift workers on demographic variables.
| Variables | Type of work | Total (n = 60) | X2 | P | |
|---|---|---|---|---|---|
| Shift workers (n = 30) | Day workers n = 30) | ||||
| Age (%) | |||||
| 20–30 years | 8 (26.7) | 8 (26.7) | 16 (26.7) | 1.673 | 0.643 |
| 31–40 years | 18 (60) | 15 (50) | 33 (55) | ||
| 41–50 years | 4 (13.3) | 6 (20) | 10 (16.7) | ||
| 50< | 0 (0) | 1 (3.3) | 1 (1.7) | ||
| Marital status (%) | |||||
| Married | 29 (96.7) | 26 (86.7) | 55 (91.7) | 1.964 | 0.161 |
| Unmarried | 1 (3.3) | 4 (13.3) | 5 (8.3) | ||
| Education (%) | |||||
| Diploma | 9 (30) | 7 (23.3) | 16 (26.7) | 1.404 | 0.705 |
| Associated Diploma | 5 (16.7) | 7 (23.3) | 12 (20) | ||
| Undergraduate | 14 (46.7) | 12 (40) | 26 (43.3) | ||
| Graduate | 2 (6.7) | 4 (13.3) | 6 (10) | ||
[i] Note: * p < 0.05
Table 2
Comparison of shift and day workers on PSQI.
| Variables | Shift workers (n = 30) | Day workers (n = 30) | Z-Score | P | |||
|---|---|---|---|---|---|---|---|
| Mean/S.D. | Median | Mean/S.D. | Median | ||||
| PSQI global score | 6.60/3.223 | 6.50 | 4.43/2.473 | 4 | –3.223 | 0.001* | |
| Subjective sleep quality | 1.13/0.860 | 1 | 0.83/0.531 | 1 | –1.285 | 0.199 | |
| Sleep latency | 1.23/1.135 | 1 | 0.83/0.913 | 1 | –1.332 | 0.183 | |
| Sleep duration | 1.47/0.937 | 1.50 | 0.97/0.809 | 1 | –2.029 | 0.042* | |
| Habitual sleep efficiency | 0.57/0.728 | 0 | 0.23/0.568 | 0 | –2.302 | 0.021* | |
| Sleep disturbance | 1.23/0.679 | 1 | 0.83/0.592 | 1 | –2.299 | 0.021* | |
| Use of sleep medication | 0.0 | 0 | 0.0 | 0 | 0.00 | 1 | |
| Daytime dysfunction | 1/1.050 | 1 | 0.73/0.785 | 1 | –0.809 | 0.419 | |
[i] Note: * p < 0.05
Table 3
Comparison of shift and day workers on Corsi Block-Tapping Task (CBTT).
| Groups | Sample | Mean | SD | Median | Z-score | P |
|---|---|---|---|---|---|---|
| Shift workers | 30 | 4.93 | 0.70 | 5 | –2.354 | 0.019* |
| Day workers | 30 | 5.45 | 0.66 | 5 |
[i] Note: * p < 0.05
Table 4
Comparison of the groups on Berg’s Card Sorting Task (BCST) and Continuous Performance Task (CPT).
| Variables | Shift workers (n = 30) | Day workers (n = 30) | T-Value | P | |||
|---|---|---|---|---|---|---|---|
| Mean | S.D. | Mean | S.D. | ||||
| BCST | |||||||
| Perseverative error | 29.70 | 11.23 | 23.40 | 8.03 | 2.49 | 0.015* | |
| Completed categories | 4.40 | 2.343 | 5.57 | 2.09 | –2.03 | 0.047* | |
| CPT | |||||||
| Omission error | 9.20 | 9.15 | 5.20 | 4.36 | 2.15 | 0.037* | |
| Commission error | 18.60 | 7.25 | 14.83 | 6.67 | 2.09 | 0.041* | |
| Reaction time | 397.55 | 50.05 | 404.68 | 44.33 | –.0.58 | 0.561 | |
[i] Note: * p < 0.05