Table 3.
Results of Exploratory Factor Analysis on the MGH-HPS-TR
| Items | Patients (Mean±SD) | Sample (Mean±SD) | Factor loadings |
|---|---|---|---|
| M1. On an average day, how often did you feel the urge to pull your hair? | 2.48±1.23 | 1.42±1.48 | 0.930 |
| M2. On an average day, how intense or ‘strong’ were the urges to pull your hair? | 2.34±1.08 | 1.35±1.35 | 0.947 |
| M3. On an average day, how much control do you have over the urges to pull your hair? | 2.40±1.43 | 1.39±1.42 | 0.931 |
| M4. On an average day, how often did you actually pull your hair? | 2.08±1.23 | 1.17±1.31 | 0.908 |
| M5. On an average day, how often did you make an attempt to stop yourself from actually pulling your hair? | 2.22±1.17 | 1.33±1.39 | 0.844 |
| M6. On an average day, how often were you successful at actually stopping yourself frompulling your hair? | 2.80±1.24 | 1.57±1.61 | 0.914 |
| M7. During the past week how uncomfortable did your hair pulling make you feel? | 2.44±1.40 | 1.35±1.57 | 0.851 |
| Eigenvalue | 5.774 | ||
| Variance (%) | 82.5 |