TABLE 3.
Difference-in-difference estimates for past-month use of cannabis only (no cigarettes)
| Adjusted DID estimate | ||||
|---|---|---|---|---|
| MCL aOR (95% CI) | P_int | RCL aOR (95% CI) | P_int | |
| Overall | 1.021 (0.947, 1.101) | 1.206 (1.088, 1.336) | ||
| Age (years) | ||||
| 12–17 | 0.898 (0.820, 0.983) | 0.014 | 0.737 (0.624, 0.871) | < 0.001 |
| 18–25 | 0.954 (0.882, 1.033) | 0.146 | 0.964 (0.855, 1.087) | < 0.001 |
| 25–34 | 1.032 (0.920, 1.157) | Ref. | 1.401 (1.178, 1.666) | Ref. |
| 35–49 | 0.983 (0.884, 1.094) | 0.471 | 1.374 (1.163, 1.623) | 0.868 |
| 50+ | 1.241 (1.070, 1.438) | 0.030 | 1.338 (1.068, 1.676) | 0.740 |
| F(4) = 5.956 (P < 0.001) | F(4) = 14.988 (P < 0.001) | |||
| Gender | ||||
| Male | 0.986 (0.908, 1.070) | 0.017 | 1.099 (0.977, 1.237) | 0.005 |
| Female | 1.079 (0.990, 1.176) | Ref. | 1.365 (1.190, 1.566) | Ref. |
| F(1) = 5.654 (P = 0.017) | F(1) = 7.844 (P = 0.005) | |||
| Marital status | ||||
| Married | 1.099 (0.980, 1.232) | 0.002 | 1.345 (1.139, 1.587) | 0.020 |
| Widowed/divorced/separated | 1.179 (1.012, 1.373) | 0.002 | 1.351 (1.063, 1.715) | 0.094 |
| Never married | 0.939 (0.863, 1.022) | Ref. | 1.095 (0.972, 1.233) | Ref. |
| F(2) = 7.979 (P < 0.001) | F(2) = 3.388 (P = 0.034) | |||
| Income | ||||
| < $20 000 | 1.001 (0.908, 1.104) | 0.233 | 1.177 (0.983, 1.409) | 0.917 |
| $20 000–74 000 | 0.965 (0.875, 1.064) | 0.045 | 1.244 (1.062, 1.458) | 0.638 |
| ≥ $75 000 | 1.060 (0.973, 1.154) | Ref. | 1.189 (1.041, 1.359) | Ref. |
| F(2) = 2.092 (P = 0.124) | F(2) = 0.148 (P = 0.863) | |||
| Race/ethnicity | ||||
| Non-Hispanic white | 1.077 (0.993, 1.168) | Ref. | 1.211 (1.078, 1.360) | Ref. |
| Non-Hispanic black | 0.983 (0.876, 1.104) | 0.109 | 0.955 (0.719, 1.269) | 0.106 |
| Hispanic | 0.833 (0.732, 0.949) | < 0.001 | 1.305 (1.048, 1.626) | 0.541 |
| Non-Hispanic other | 0.871 (0.738, 1.027) | 0.008 | 1.231 (0.968, 1.566) | 0.895 |
| F(3) = 7.173 (P < 0.001) | F(3) = 1.163 (P = 0.323) | |||
| Educational attainment | ||||
| Less than high school | 0.780 (0.676, 0.901) | < 0.001 | 1.399 (1.089, 1.798) | 0.584 |
| High school or equivalent | 1.050 (0.939, 1.173) | 0.871 | 1.153 (0.950, 1.400) | 0.322 |
| Some college | 1.019 (0.924, 1.125) | 0.480 | 1.141 (0.983, 1.324) | 0.177 |
| College graduate or above | 1.060 (0.951, 1.181) | Ref. | 1.295 (1.100, 1.525) | Ref. |
| F(3) = 6.059 (P < 0.001) | F(3) = 1.172 (P = 0.319) | |||
aOR = adjusted odds ratio; CI = confidence interval; DID = difference-in-difference; MCL = medical cannabis laws; P_int = P-value for the interaction term; RCL = recreational cannabis laws.
Adjusted analyses were adjusted for the other socio-demographic variables listed in the table.