Table 2.
Effects of flower characteristics on symptom relief
| Outcome = symptom change (ending – starting symptom) | (1) | (2) | (3) | (4) |
|---|---|---|---|---|
| Panel A: labeled plant phenotype, omitted category = hybrid | ||||
| C. indica | 0.073 | – | – | 0.425 |
| (0.097) | – | – | (0.309) | |
| C. sativa | 0.034 | – | – | 0.001 |
| (0.076) | – | – | (0.229) | |
|
| ||||
| Panel B: combustion method, omitted category = joint | ||||
| Pipe | – | –0.040 | – | 0.812** |
| (0.129) | – | (0.401) | ||
| Vape | – | 0.292** | – | 1.288** |
| – | (0.118) | – | (0.519) | |
|
| ||||
| Panel C: THC and CBD, omitted categories = THC <10% and CBD <1% | ||||
| THC 10–19% | – | – | 0.125 | 0.072 |
| – | – | (0.254) | (0.244) | |
| THC 20–35% | – | – | –0.049 | 0.022 |
| – | – | (0.268) | (0.269) | |
| CBD 1–9% | – | – | –0.278 | –0.401* |
| – | – | (0.204) | (0.241) | |
| CBD 10–35% | – | – | 0.226 | 0.132 |
| – | – | (0.188) | (0.191) | |
| Starting symptom level | –0.668*** | –0.666*** | –0.660*** | –0.606*** |
| (0.026) | (0.026) | (0.063) | (0.068) | |
| Log dose | –0.206*** | –0.227*** | –0.199 | –0.171 |
| (0.067) | (0.067) | (0.157) | (0.171) | |
| Constant | 0.902*** | 0.853*** | 1.030** | –0.257 |
| (0.211) | (0.203) | (0.522) | (0.726) | |
| Sessions, n | 3,493 | 3,647 | 724 | 632 |
| R 2 | 0.286 | 0.289 | 0.270 | 0.257 |
| Users, n | 1,113 | 1,141 | 311 | 270 |
All regressions are estimated using a fixed-effects model. C. indica and C. sativa are relative to hybrid, THC categories are relative to THC between 0 and 9%, CBD categories are relative to 0% CBD, and pipe and vape are relative to joint. Standard errors, clustered at the individual user level, are shown in parentheses.
***
p < 0.01.
**
p < 0.05.
*
p < 0.10.