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 | 4.140104 | 3.051848 | 1.36 | 0.177 |
  Trend | − 1.373532 | 0.2321417 | − 5.92 | 0.000* |
 USA | ||||
  Level | 95.65063 | 3.482517 | 27.47 | 0.000* |
  Trend | − 1.295596 | 0.3823137 | − 3.39 | 0.001* |
After EVALI | ||||
 GBA | ||||
  Level change | − 0.8664863 | 4.936645 | − 0.18 | 0.861 |
  Trend change | 0.7472639 | 0.6716606 | 1.11 | 0.268 |
 USA | ||||
  Level change | 3.427075 | 4.571001 | 0.75 | 0.455 |
  Trend change | − 1.770607 | 0.9661419 | − 1.83 | 0.069 |
After mass ban | ||||
 GBA | ||||
  Level change | − 14.18386 | 6.428874 | − 2.21 | 0.029* |
  Trend change | − 1.189679 | 0.941033 | − 1.26 | 0.208 |
 USA | ||||
  Level change | 0.1329325 | 7.218978 | 0.02 | 0.985 |
  Trend change | 2.631157 | 1.278143 | 2.06 | 0.042* |
After ban ended | ||||
 GBA | ||||
  Level change | − 0.0827453 | 4.759094 | − 0.02 | 0.986 |
  Trend change | 2.808323 | 0.6655645 | 4.22 | 0.000* |
 USA | ||||
  Level change | − 3.341619 | 2.741816 | − 1.22 | 0.225 |
  Trend change | 0.0170775 | 1.126806 | 0.02 | 0.988 |
After COVID− 19 | ||||
 GBA | ||||
  Level change | 6.271158 | 4.28192 | 1.46 | 0.145 |
  Trend change | − 0.7918229 | 0.7104741 | − 1.11 | 0.267 |
USA | ||||
  Level change | − 1.653717 | 3.959569 | − 0.42 | 0.677 |
  Trend change | − 0.3092617 | 0.8731348 | − 0.35 | 0.724 |
After tax | ||||
 GBA | ||||
  Level change | 0.5203217 | 3.957587 | 0.13 | 0.896 |
  Trend change | 0.9910441 | 0.7555539 | 1.31 | 0.192 |
 USA | ||||
  Level change | 2.519472 | 3.075552 | 0.82 | 0.414 |
  Trend change | − 1.39879 | 0.8390774 | − 1.67 | 0.098 |