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. 2020 Jun 29;93(2):251–264.

Table 4. Robustness checks.

(1) (2) (3) (4) (5)
THC & CBD continuous Max symptom relief 1 hour relief 2 hours relief 3 hours relief
C. indica 0.194 0.318* 0.356 0.343 0.223
(0.189) (0.141) (0.200) (0.210) (0.185)
C. sativa -0.108 0.046 0.111 0.075 -0.077
(0.184) (0.164) (0.208) (0.237) (0.190)
Pipe -0.082 -0.068 -0.070 -0.090 -0.082
(0.287) (0.328) (0.282) (0.269) (0.281)
Vape -0.094 -0.114 -0.141 0.018 -0.028
(0.318) (0.340) (0.338) (0.285) (0.323)
THC 10-19% -0.202 -0.484 -0.428 -0.312
(0.156) (0.259) (0.232) (0.208)
THC 20-35% -0.324 -0.604* -0.592* -0.516*
(0.186) (0.294) (0.293) (0.253)
CBD 1-9% 0.189 0.352 0.352 0.133
(0.182) (0.213) (0.202) (0.169)
CBD 10-35% 0.313 0.522 0.524* 0.324
(0.236) (0.277) (0.245) (0.221)
THC % -0.025
(0.013)
CBD % 0.009
(0.011)
Starting Symptom Level -0.646** -0.690** -0.637** -0.687** -0.648**
(0.052) (0.048) (0.053) (0.051) (0.052)
Constant 0.503 0.160 0.261 0.382 0.305
(0.418) (0.337) (0.386) (0.389) (0.380)
Number of sessions 915 915 849 897 914
R2 0.369 0.432 0.379 0.409 0.379
Number of users 387 387 378 384 387

Notes: All regressions are estimated using a fixed effects model. C. indica and C. sativa are relative to Hybrid, and Pipe and Vape are relative to Joint. In column 1, continuous THC and CBD levels are used. In columns 2-5, THC categories are relative to THC between 0 and 10%, and CBD categories are relative to 0% CBD. Unstandardized coefficients are shown with standard errors, clustered at the individual user level, in parentheses. ** p<0.01, * p<0.05.