Table 2 Score distributions, skewness, floor and ceiling effects and internal consistency for EHP-30
From: Psychometric evaluation of the Swedish version of the 30-item endometriosis health profile (EHP-30)
Subscale of EHP-30 | Median | 25th percentile | 75th percentile | Coefficient of skewness | Floor effect | Ceiling effect | Cronbachs alpha |
|---|---|---|---|---|---|---|---|
Pain | 34 | 16 | 57 | 0.03 | 0.08 | 0.00 | 0.96 |
Control & Powerlessness | 58 | 33 | 75 | −0.22 | 0.03 | 0.02 | 0.92 |
Emotional Wellbeing | 42 | 29 | 62 | −0.08 | 0.04 | 0.00 | 0.91 |
Social Support | 50 | 25 | 69 | −0.18 | 0.09 | 0.02 | 0.88 |
Self-Image | 50 | 25 | 67 | −0.05 | 0.09 | 0.02 | 0.83 |
Total | 44 | 26 | 60 | −0.15 | 0.01 | 0.00 | 0.97 |