Table 2.
Bivariate Spearman correlations between key study variables (N = 534,176).
| Tobacco policy | Cannabis policy | Overall policy | Tobacco retailer density | Cannabis retailer density | Summed retailer density | Tobacco use | Cannabis use | Co-use | |
|---|---|---|---|---|---|---|---|---|---|
| Tobacco policy | 1.000 | ||||||||
| Cannabis policy | −0.240 | 1.000 | |||||||
| Overall policy | 0.415 | 0.743 | 1.000 | ||||||
| Tobacco retailer density | 0.079 | −0.070 | −0.021 | 1.000 | |||||
| Cannabis retailer density | 0.048 | −0.065 | −0.038 | 0.095 | 1.000 | ||||
| Summed retailer density | 0.079 | −0.071 | −0.021 | 0.998 | 0.125 | 1.000 | |||
| Tobacco use | −0.024 | −0.001 | −0.011 | -0.003 | −0.005 | −0.004 | 1.000 | ||
| Cannabis use | 0.003 | −0.021 | −0.015 | 0.005 | −0.001 | 0.005 | 0.601 | 1.000 | |
| Co-use | −0.009 | −0.014 | −0.016 | 0.002 | −0.004 | 0.002 | 0.822 | 0.878 | 1.000 |
Note: Individual-level data come from 2017 to 2018 California Health Kids Survey; Jurisdiction-level data are from American Community Survey (2015–2019 5-year estimates); Policy strength data for tobacco and vape came from American Lung Association 2017 State of Tobacco Control Grades; Cannabis policy strength data came from the California Cannabis Local Laws Database for 2018; Retailer locations were purchased from a commercial data provider.