From: Effect of Massachusetts House Bill No. 4196 on electronic cigarette use: a mixed-methods study
 | Coefficient | Standard error | t statistic | p value |
---|---|---|---|---|
Baseline | ||||
 GBA | ||||
  Level | − 1.260115 | 1.855424 | − 0.68 | 0.498 |
  Trend | − 0.2084171 | 0.1424893 | − 1.46 | 0.146 |
 USA | ||||
  Level | − 7.223334 | 1.684262 | − 4.29 | 0.000* |
  Trend | − 0.1965167 | 0.1554116 | − 1.26 | 0.208 |
After EVALI | ||||
 GBA | ||||
  Level change | − 3.081916 | 1.843995 | − 1.67 | 0.097 |
  Trend change | 0.2512693 | 0.2184791 | 1.15 | 0.252 |
 USA | ||||
  Level change | 3.209894 | 1.221976 | 2.63 | 0.010* |
  Trend change | 0.0570767 | 0.2734974 | 0.21 | 0.835 |
After mass ban | ||||
 GBA | ||||
  Level change | 2.278667 | 1.824167 | 1.25 | 0.214 |
  Trend change | − 0.0303285 | 0.2785707 | − 0.11 | 0.913 |
 USA | ||||
  Level change | 1.288095 | 0.874842 | 1.47 | 0.143 |
  Trend change | 0.6289722 | 0.3434625 | 1.83 | 0.069 |
After ban ended | ||||
 GBA | ||||
  Level change | − 1.300539 | 1.978937 | − 0.66 | 0.512 |
  Trend change | 0.1918814 | 0.237574 | 0.81 | 0.421 |
 USA | ||||
  Level change | − 1.455614 | 1.241793 | − 1.17 | 0.243 |
  Trend change | − 0.3225095 | 0.4276565 | − 0.75 | 0.452 |
After COVID-19 | ||||
 GBA | ||||
  Level change | − 4.319313 | 4.899213 | − 0.88 | 0.380 |
  Trend change | 0.4127087 | 0.6795817 | 0.61 | 0.545 |
 USA | ||||
  Level change | − 11.23393 | 3.299207 | − 3.41 | 0.001* |
  Trend change | 0.7737937 | 0.4751412 | 1.63 | 0.106 |
After tax | ||||
 GBA | ||||
  Level change | − 13.61722 | 3.55943 | − 3.83 | 0.000* |
  Trend change | − 0.4348779 | 0.687841 | − 0.63 | 0.528 |
 USA | ||||
  Level change | − 0.5232736 | 1.81891 | − 0.29 | 0.774 |
  Trend change | − 1.124816 | 0.4704655 | − 2.39 | 0.018* |