Table 2.
The final reduced multivariable logistic regression models
| |
1. Vietnamese-immigrant/Mekong Delta Vietnamese Final Model |
2. Vietnamese-immigrants/Australian-born Final Model |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Predictor variables | df | Wald Chi-Square | p value | OR | 95% C.I. | df | Wald Chi-Square | p value | OR | 95% C.I. | ||
|
Main effects | ||||||||||||
| |
Female (Reference: Male) |
1 |
20.12 |
<.000 |
2.0 |
1.5–2.7 |
1 |
109.40 |
<.000 |
2.3 |
1.9–2.7 |
|
| |
Unemployment (Reference: Paid Employment) |
1 |
15.19 |
<.000 |
2.3 |
1.5–3.5 |
1 |
19.10 |
<.000 |
1.8 |
1.4–2.4 |
|
| |
Substance Use Disorder (Reference: No SUD) |
1 |
9.66 |
<.000 |
4.0 |
1.7–9.6 |
1 |
134.01 |
<.000 |
3.5 |
1.8–6.8 |
|
| |
PTE (Reference: 0 PTE) |
|
|
|
|
|
|
|
|
|
|
|
| |
|
1–2 PTEs |
1 |
0.00 |
0.959 |
1.0 |
0.8–1.3 |
1 |
5.42 |
0.020 |
0.9 |
0.2–3.0 |
| |
|
3+ PTEs |
1 |
19.58 |
<.000 |
2.0 |
1.7–2.3 |
1 |
137.12 |
<.000 |
1.9 |
1.6–2.3 |
| |
Age group |
|
|
|
|
|
|
|
|
|
|
|
| |
|
Age: 18–29 years |
1 |
4.64 |
0.031 |
0.6 |
0.4–1.0 |
Reference |
|
|
1.0 |
|
| |
|
Age: 30–44 years |
Reference |
|
|
1.0 |
|
1 |
15.06 |
<.000 |
1.4 |
1.2–1.7 |
| |
|
Age: 45+ years |
1 |
0.21 |
0.650 |
0.9 |
0.6–1.3 |
1 |
0.27 |
0.601 |
0.9 |
0.8–1.2 |
| |
Number of medical conditions (Reference: 0 medical conditions) |
|
|
|
|
|
|
|
|
|
|
|
| |
|
Medical conditions: 1 condition |
1 |
0.16 |
0.686 |
1.9 |
1.3–2.6 |
1 |
0.58 |
0.445 |
1.0 |
0.7–1.2 |
| |
|
Medical conditions: 2 or more conditions |
1 |
30.54 |
<.000 |
3.9 |
2.6–5.9 |
1 |
36.81 |
<.000 |
2.2 |
1.8–2.7 |
| |
Population group (Ref: Vietnamese-immigrant) |
|
5.65 |
0.017 |
1.3 |
1.0–1.6 |
1 |
14.52 |
<.000 |
1.3 |
1.1–1.5 |
|
|
Interaction effects | ||||||||||||
| |
Population group by Age |
2 |
8.86 |
0.012 |
|
|
2 |
18.90 |
<.000 |
|
|
|
| |
Population group by Age by PTE exposure |
4 |
7.53 |
0.110 |
|
|
4 |
12.29 |
0.015 |
|
|
|
| |
|
|
|
|
|
|
2 |
14.99 |
<.001 |
|
|
|
| Population group by Age by Substance use disorder | ||||||||||||
Presented are the final reduced multivariable logistic regression models for Analysis 1: Vietnamese-immigrant/Mekong Delta Vietnamese; Analysis 2: Vietnamese-immigrant/Australian-born. Both main and interaction effects are included, with reference group indicated in the left column where applicable. Interpreting findings at the main effect level must be treated with caution in the presence of a significant interaction effect (indicated by italicized OR and 95% C.I. indices). Note: different reference groups are used for the age variable between analysis 1 and 2.