Table 5.
Correlation between iron status biomarkers and CSHQ total score and subscales in the ID group (Spearman’s correlation test was used for ferritin; Pearson’s correlation test was used for transferrin and iron).
| CSHQ Total | Bedtime Resistance |
Sleep Onset Delay |
Sleep Duration |
Sleep Anxiety | Night Wakings |
Parasomnias | SDB | Daytime Sleepiness |
||
|---|---|---|---|---|---|---|---|---|---|---|
| Ferritin (ng/mL) |
Rho p-value |
−0.059 0.812 |
−0.436 0.062 |
0.433 0.064 |
0.200 0.412 |
−0.266 0.272 |
0.060 0.808 |
−0.141 0.565 |
−0.053 0.830 |
0.195 0.424 |
| Transferrin (mg/dL) |
r p-value |
−0.193 0.428 |
0.225 0.354 |
−0.406 0.085 |
−0.253 0.295 |
0.055 0.824 |
−0.164 0.501 |
−0.157 0.522 |
−0.249 0.303 |
−0.257 0.287 |
| Iron (µg/dL) |
r p-value |
−0.022 0.927 |
−0.149 0.543 |
−0.316 0.188 |
−0.280 0.245 |
0.094 0.701 |
0.167 0.495 |
−0.068 0.784 |
0.002 0.992 |
0.191 0.435 |
SDB: sleep-disordered breathing.