From: Effect of Massachusetts House Bill No. 4196 on electronic cigarette use: a mixed-methods study
 | N | Percentage |
---|---|---|
Daily e-cigarette use | ||
 Prior to June 1 | 28 | 77.78 |
 After June 1 | 28 | 77.78 |
 Change | 0 | 0 |
Any combustible cigarette use | ||
 Prior to June 1 | 3 | 8.33 |
 After June 1 | 4 | 11.11 |
 Change | 1 | 33.33 |
Any vaporizable THC use | ||
 Prior to June 1 | 6 | 16.67 |
 After June 1 | 7 | 19.44 |
 Change | 1 | 16.67 |
Any combustible marijuana use | ||
 Prior to June 1 | 6 | 16.67 |
 After June 1 | 7 | 19.44 |
 Change | 1 | 16.67 |