Table 3.
The Three Latent Classes Model of Substance Use and Related Covariates
| Latent Class | |||
|---|---|---|---|
| Non User | Tobacco and Illicit Drug User | Poly Drug User | |
| Latent class prevalence | 0.875 | 0.087 | 0.038 |
| Item-response probabilities | |||
| Cigarette smoking (last month)a | 0.007 | 0.730b | 0.630 |
| Hookah smoking (last month) | 0.036 | 0.599 | 0.713 |
| Alcohol use (last month) | 0.007 | 0.391 | 0.736 |
| Prescription-type opioids use (last month) | 0.070 | 0.117 | 0.723 |
| Methylphenidate use (last month) | 0.002 | 0.023 | 0.501 |
| Sedative-hypnotics use (last month) | 0.026 | 0.096 | 0.774 |
| Illicit drugs use (life time) | 0.019 | 0.505 | 0.953 |
| Covariates | OR (95% CI) | OR (95% CI) | OR (95% CI) |
| Age (p=0.800) | Reference | 1.01 (0.95–1.07) | 1.07 (0.96–1.19) |
| Gender (being male)(p<0.001) | Reference | 3.47 (1.99–6.06)c | 1.71 (0.55–5.37) |
| Having extra marital sex (last month) (p<0.001) | Reference | 4.37 (1.49–12.87)c | 28.29 (8.45–94.76)c |
| Living alone (p=0.002) | Reference | 5.41 (2.29–12.83)c | 4.29 (1.01–18.35)c |
| Religious beliefs(p=0.007) | Reference | 0.97 (0.96–0.99)c | 1.02 (0.99–1.07) |
| Familial support (p=0.026) | Reference | 0.97 (0.94–0.99)c | 0.94 (0.89–0.98)c |
Notes: The probability of a “No” response can be calculated by subtracting the item-response probabilities shown above from 1. aProbability of a “Yes”. bItem-response probabilities >0.5 in bold to facilitate interpretation. cSignificant OR.