Table 3.
Correlation between serum 25(OH)D levels and PSQI components.
| Serum 25-Hydroxyvitamin D Level | ||||
|---|---|---|---|---|
| PSQI Complex | Shift Workers (n = 150) |
Non-Shift Workers (n = 203) |
||
| r | p-Value | r | p-Value | |
| Component 1; subjective sleep quality | 0.140 | 0.088 | −0.024 | 0.737 |
| Component 2; sleep latency | −0.029 | 0.725 | 0.080 | 0.254 |
| Component 3; sleep duration | 0.132 | 0.108 | −0.037 | 0.596 |
| Component 4; habitual sleep efficiency | 0.066 | 0.421 | 0.053 | 0.450 |
| Component 5; sleep disturbance | 0.070 | 0.396 | −0.023 | 0.744 |
| Component 6; use of sleep medicine | −0.172 | 0.036 * | 0.081 | 0.248 |
| Component 7; daytime dysfunction | −0.200 | 0.014 * | 0.039 | 0.578 |
Data are presented as r and p-value. r, Pearson’s correlation coefficient. * p < 0.05 denotes statistical significance.