Table 5. Sensitivity of the SF-36v2 and the QOL-DAv2.0 in average daily dose of methadone intake (mg): scores (mean ± SD) and relative efficiency (RE) (N = 1212).
| Average daily dose of methadone intake (mg) | F | RE† | ||||
| ≤ 20 (n = 23) | 21–60 (n = 886) | >60 (n = 303) | ||||
| SF-36v2 | ||||||
| Physical component summary (PCS) | 51.31±5.43 | 48.74±7.82 | 48.07±8.40 | 2.15 | 1.82 | |
| Mental component summary (MCS) | 44.27±8.93 | 41.27±10.86 | 40.05±10.46 | 2.53 | 2.14 | |
| Physical functioning (PF) | 53.05±5.02 | 49.98±7.34 | 49.13±7.62 | 3.71* | 3.14 | |
| Role-physical (RP) | 49.64±8.00 | 45.55±10.46 | 44.79±10.61 | 2.49 | 2.11 | |
| Bodily pain (BP) | 48.99±8.90 | 48.52±10.81 | 47.40±11.14 | 1.26 | 1.07 | |
| General health (GH) | 42.60±12.06 | 39.85±10.92 | 39.20±11.23 | 1.18△ | 1.00 | |
| Vitality (VT) | 51.82±8.27 | 47.19±10.30 | 45.80±10.80 | 4.61* | 3.91 | |
| Social functioning (SF) | 47.31±9.07 | 44.62±10.00 | 44.00±10.33 | 1.33 | 1.13 | |
| Role-emotional (RE) | 43.76±11.82 | 41.88±12.09 | 40.45±11.73 | 2.00 | 1.69 | |
| Mental health (MH) | 45.30±8.86 | 41.86±10.54 | 40.80±10.33 | 2.57 | 2.18 | |
| QOL-DAv2.0 | ||||||
| Physiology (PH) | 32.96±5.88 | 29.58±6.96 | 29.07±7.40 | 3.39* | 2.87 | |
| Psychology (PS) | 36.43±7.73 | 33.35±8.63 | 33.07±8.72 | 1.62 | 1.37 | |
| Society (SO) | 40.39±6.75 | 36.12±7.59 | 35.59±7.57 | 4.38* | 3.71 | |
| Symptoms (ST) | 47.83±8.61 | 44.52±8.99 | 42.94±9.20 | 5.34** | 4.53 | |
| Total score | 157.61±26.22 | 143.58±27.76 | 140.67±28.40 | 4.39* | 3.72 | |
† RE: relative efficiency was calculated as the ratio of F-statistics. The RE with significant F-statistics was in bold.
△
The scale with the smallest F-statistics was used as the denominator in RE calculation.
*
P<0.05. ** P<0.01.