From: Effect of Massachusetts House Bill No. 4196 on electronic cigarette use: a mixed-methods study
 | Coefficient | Standard error | t value | p value | 95% confidence interval | |
---|---|---|---|---|---|---|
Baseline | ||||||
 GBA | 4.140104 | 3.051848 | 1.36 | 0.177 | − 1.898052 | 10.17826 |
 USA | 95.65063 | 3.482517 | 27.47 | 0.000* | 88.76039 | 102.5409 |
EVALI | ||||||
 GBA | − 3.6925 | 0.6550 | − 5.6369 | 0.0000* | − 4.9885 | − 2.3964 |
 USA | − 3.0662 | 0.8282 | − 3.7021 | 0.0003* | − 4.7049 | − 1.4275 |
 Difference | − 0.6263 | 0.6432 | − 0.9737 | 0.3320 | − 1.8988 | 0.6463 |
MA ban | ||||||
 GBA | − 2.2510 | 0.7901 | − 2.8490 | 0.0051* | − 3.8142 | − 0.6878 |
 USA | − 0.4350 | 0.7573 | − 0.5745 | 0.5667 | − 1.9334 | 1.0633 |
 Difference | − 1.8159 | 0.6195 | − 2.9312 | 0.0040* | − 3.0417 | − 0.5902 |
After ban ended | ||||||
 GBA | 0.5744 | 0.6246 | 0.9196 | 0.3595 | − 0.6614 | 1.8102 |
 USA | − 0.4180 | 0.5692 | − 0.7343 | 0.4641 | − 1.5442 | 0.7082 |
 Difference | 0.9924 | 0.2911 | 3.4086 | 0.0009* | 0.4164 | 1.5684 |
COVID-19 | ||||||
 GBA | − 0.5267 | 0.5933 | − 0.8877 | 0.3763 | − 1.7005 | 0.6471 |
 USA | − 0.7272 | 0.6887 | − 1.0559 | 0.2930 | − 2.0899 | 0.6355 |
 Difference | 0.2006 | 0.6068 | 0.3305 | 0.7415 | − 0.9999 | 1.4010 |
MA tax | ||||||
 GBA | − 0.9344 | 0.4942 | − 1.8907 | 0.0609 | − 1.9122 | 0.0434 |
 USA | − 2.1260 | 0.5320 | − 3.9965 | 0.0001* | − 3.1785 | − 1.0735 |
 Difference | 1.1916 | 0.4405 | 2.7051 | 0.0078* | 0.3201 | 2.0631 |