Table 3.
Results from latent class growth analysis (LCGA) based on EQ-5D† score trajectories (N = 443).
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|---|---|---|---|---|---|---|
| Latent HRQoL classes
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| Stably High | Stably Moderate | Stably Low | ||||
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| Class assignment‡ | N | % | N | % | N | % |
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| 107 | 24.2 | 260 | 58.7 | 76 | 17.2 | |
| Parameter estimates of trajectories | β | S.E. | β | S.E. | β | S.E. |
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| Constant | 1.207* | (0.058) | 0.871* | (0.023) | 0.613* | (0.049) |
| OAT receipt | −0.027 | (0.047) | −0.017 | (0.021) | −0.023 | (0.040) |
| Illicit opioid use, non-daily | −0.040 | (0.040) | −0.023 | (0.019) | 0.035 | (0.031) |
| Illicit opioid use, daily | −0.084 | (0.053) | −0.056* | (0.025) | −0.014 | (0.045) |
| Stimulant use, non-daily | −0.109* | (0.041) | −0.029 | (0.018) | 0.023 | (0.032) |
| Stimulant use, daily | −0.167* | (0.066) | −0.059 | (0.033) | −0.020 | (0.054) |
| Class membership probability | Log OR | S.E. | Referent class | Log OR | S.E. | |
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| Age at baseline | 0.003 | (0.022) | - | 0.011 | (0.027) | |
| Gender | 0.021 | (0.364) | - | −0.108 | (0.407) | |
| White | −1.461* | (0.652) | - | 1.083 | (1.681) | |
| Aboriginal | −0.519 | (0.677) | - | 0.493 | (1.716) | |
| Physical disability | −0.893* | (0.423) | - | 2.800 | (1.977) | |
| Mental illness, ever | −1.767* | (0.349) | - | 1.184* | (0.519) | |
| HIV+ | 0.046 | (0.362) | - | 0.614 | (0.401) | |
| HCV+ | 0.119 | (0.625) | - | −0.824 | (0.671) | |
*
Statistically significant at the 5% level.
†
EQ-5D is a preference weighted multi-attribute index value for health utility.
‡
Class assignment was based on posterior probability of membership.
N: Number of individuals
HIV+: Human Immunodeficiency Virus positive
HCV+: Hepatitis C positive
Log OR: Log odds ratio
S.E.: Standard Error