Results from adjusted logistic regression analyses, n=1539
| Model covariates | Low birth weight OR (95% CI) | P value |
| THC positive | 1.9 (1.3 to 2.7) | 0.001 |
| Patient characteristics | ||
| Maternal age | 1.0 (1.0 to 1.0) | 0.960 |
| Comorbidities and risk factors | ||
| Tobacco use | 1.8 (1.2 to 2.6) | 0.002 |
| Alcohol use | 1.2 (0.4 to 3.4) | 0.792 |
| Diabetes | 1.6 (1.0 to 2.6) | 0.054 |
| Hypertension | 1.6 (1.0 to 2.4) | 0.033 |
| Cervical insufficiency | 2.9 (0.9 to 9.2) | 0.072 |
| Multiple gestation | 5.7 (2.8 to 11.4) | <0.001 |
Multivariable logistic regression controlled for tobacco use, alcohol use, diabetes, hypertension, cervical insufficiency and multiple gestation. Note: there was one patient missing age and was excluded from multiple regression models.
Bold values denote statistical significance.
THC, tetrahydrocannabinol.