Table 2. Influences of repeated terminations and past treatment time on HRQoL: Linear regression analysis (N = 1212).
| Independent variables | SF-36v2PCS | SF-36v2MCS | QOL-DAv2.0 | |||
|---|---|---|---|---|---|---|
| B (95%CI) | P | B (95%CI) | P | B (95%CI) | P | |
| Univariate analysis | ||||||
| Repeated terminations | ||||||
| Yes | 0.00 | 0.00 | 0.00 | |||
| No | 1.33 (0.41, 2.25) | 0.005 | 0.35 (-0.90, 1.60) | 0.58 | 1.86 (-0.17, 3.89) | 0.07 |
| Past treatment time (year)a | <0.001 | 0.31 | 0.032 | |||
| < 1 | 0.00 | 0.00 | 0.00 | |||
| 1~ | -1.09 (-2.66, 0.48) | 0.17 | -1.23 (-3.37, 0.91) | 0.26 | -1.17 (-4.64, 2.31) | 0.51 |
| 2~ | -1.74 (-3.45, -0.04) | 0.045 | 0.11 (-2.23, 2.43) | 0.93 | -0.16 (-3.95, 3.62) | 0.93 |
| 3~ | -2.26 (-3.90, -0.62) | 0.007 | -0.89 (-3.13, 1.35) | 0.44 | -3.15 (-6.78, 0.48) | 0.09 |
| ≥ 4 | -3.15 (-4.53, -1.78) | <0.001 | -1.61 (-3.48, 0.27) | 0.09 | -3.87 (-6.91, -0.83) | 0.013 |
| Multivariate analysis Ɨ | ||||||
| Repeated terminations | ||||||
| Yes | 0.00 | 0.00 | 0.00 | |||
| No | 0.76 (-0.18, 1.69) | 0.11 | 0.09 (-1.19, 1.37) | 0.89 | 1.17 (-0.89, 3.22) | 0.27 |
| Past treatment time (year)b | 0.004 | 0.63 | 0.30 | |||
| < 1 | 0.00 | 0.00 | 0.00 | |||
| 1~ | -0.76 (-2.33, 0.81) | 0.34 | -1.07 (-3.23, 1.09) | 0.33 | -0.76 (-4.22, 2.71) | 0.67 |
| 2~ | -1.64 (-3.36, 0.09) | 0.06 | 0.20 (-2.17, 2.56) | 0.87 | -0.17 (-3.97, 3.64) | 0.93 |
| 3~ | -1.72 (-3.38, -0.05) | 0.043 | -0.52 (-2.81, 1.77) | 0.65 | -2.28 (-5.95, 1.40) | 0.23 |
| ≥ 4 | -2.39 (-3.80, -0.97) | 0.001 | -1.05 (-2.99, 0.90) | 0.29 | -2.46 (-5.59, 0.66) | 0.12 |
Ɨ Multivariate analysis was done after controlling following variables: age at initial treatment (year: ref. ≤ 30); gender (ref. male); education level (ref. primary and below); marital status (ref. married); employment status (ref. unemployed); age at initial drug use (year: ref. ≤ 20); detoxification before initial MMT (ref. yes); drug using methods over the past 6 months (ref. oral); syringe sharing experiences (ref. yes); and initial morphine urine test (ref. positive).
HRQoL: health-related quality of life. SF-36v2: short-form 36 health survey version 2. PCS: physical component summary. MCS: mental component summary. QOL-DAv2.0: quality of life scale for drug addicts. B: regression coefficient. 95%CI: 95% confidence interval.
a P-value is for the test of effect of past treatment time on HRQoL in univariate analysis.
b P-value is for the test of effect of past treatment time on HRQoL in multivariate analysis.