Table 4. Estimates of the effects of the Pittsburgh Sleep Quality Index on the Headache Impact Test-6 score using path analysis models in migraine and TTH.
| Migraine | TTH | |||||
|---|---|---|---|---|---|---|
| β | SE | p | β | SE | p | |
| Total effects | 0.274 | 0.033 | 0.004 | 0.293 | 0.087 | 0.004 |
| Direct effect | 0.207 | 0.115 | <0.001 | 0.224 | 0.062 | 0.004 |
| Total indirect effects | 0.067 | 0.016 | 0.004 | 0.069 | 0.060 | 0.265 |
| Indirect effect via | 0.039 | 0.013 | 0.004 | 0.043 | 0.026 | 0.059 |
| Indirect effect via headache severity | 0.028 | 0.009 | 0.004 | 0.026 | 0.050 | 0.592 |
SE: standard error, TTH: tension-type headache, β: standardized regression coefficient.