Table 2.
Order of cigarette and marijuana initiation among U.S. 12th grade students, 2000–2019
| Any cigarette initiation % (SE) | Any marijuana initiation % (SE) | Neither % (SE) | Cigarettes only % (SE) | Marijuana only % (SE) | Cigarettes first % (SE) | Same grade % (SE) | Marijuana first % (SE) | |
|---|---|---|---|---|---|---|---|---|
| Among all respondents | ||||||||
| Years combined | 36.3 (0.49) | 40.3 (0.38) | 50.8 (0.41) | 8.9 (0.20) | 13.0 (0.28) | 14.4 (0.28) | 8.3 (0.16) | 4.7 (0.12) |
| By year | ||||||||
| 2000 | 56.0 (1.52) | 44.1 (1.41) | 38.6 (1.46) | 17.3 (0.99) | 5.5 (0.49) | 27.1 (1.21) | 8.9 (0.65) | 2.7 (0.34) |
| 2001 | 55.1 (1.49) | 45.7 (1.40) | 38.3 (1.39) | 15.9 (1.03) | 6.5 (0.61) | 27.4 (1.11) | 9.2 (0.70) | 2.6 (0.35) |
| 2002 | 50.2 (1.50) | 43.3 (1.39) | 42.5 (1.42) | 14.2 (0.92) | 7.3 (0.75) | 23.9 (1.04) | 9.1 (0.64) | 3.0 (0.36) |
| 2003 | 48.2 (1.34) | 42.1 (1.31) | 44.4 (1.25) | 13.5 (0.85) | 7.4 (0.56) | 21.8 (0.92) | 9.2 (0.57) | 3.7 (0.39) |
| 2004 | 46.6 (1.30) | 40.6 (1.28) | 45.8 (1.25) | 13.6 (0.88) | 7.6 (0.61) | 19.5 (0.88) | 8.9 (0.57) | 4.6 (0.40) |
| 2005 | 43.8 (1.34) | 40.6 (1.49) | 47.8 (1.35) | 11.6 (0.76) | 8.4 (0.61) | 17.9 (1.02) | 10.0 (0.58) | 4.3 (0.41) |
| 2006 | 41.7 (1.42) | 39.4 (1.52) | 49.6 (1.54) | 11.0 (0.85) | 8.7 (0.68) | 15.8 (0.84) | 9.3 (0.59) | 5.6 (0.59) |
| 2007 | 39.3 (1.50) | 37.8 (1.52) | 52.1 (1.60) | 10.1 (0.68) | 8.7 (0.63) | 15.2 (0.84) | 9.7 (0.65) | 4.3 (0.42) |
| 2008 | 38.1 (1.33) | 37.3 (1.34) | 53.0 (1.44) | 9.7 (0.64) | 8.9 (0.62) | 14.4 (0.77) | 9.2 (0.63) | 4.8 (0.41) |
| 2009 | 36.8 (1.49) | 38.1 (1.32) | 52.3 (1.45) | 9.5 (0.77) | 10.8 (0.82) | 13.5 (0.78) | 9.1 (0.57) | 4.7 (0.43) |
| 2010 | 34.6 (1.41) | 38.1 (1.56) | 53.8 (1.62) | 8.1 (0.69) | 11.6(0.80) | 11.7 (0.68) | 9.7 (0.61) | 5.1 (0.52) |
| 2011 | 34.1 (1.37) | 41.4 (1.32) | 52.2 (1.33) | 6.4 (0.53) | 13.7 (0.86) | 12.5 (0.82) | 9.6 (0.54) | 5.5 (0.53) |
| 2012 | 33.8 (1.50) | 42.0 (1.52) | 51.3 (1.50) | 6.7 (0.57) | 14.9 (0.98) | 12.1 (0.77) | 9.1 (0.63) | 5.8 (0.51) |
| 2013 | 31.6 (1.38) | 41.5 (1.45) | 52.1 (1.48) | 6.4 (0.64) | 16.3 (0.96) | 10.8 (0.71) | 8.5 (0.65) | 6.0 (0.47) |
| 2014 | 29.5 (1.23) | 40.0 (1.19) | 54.5 (1.23) | 5.5 (0.52) | 16.0 (0.91) | 9.7 (0.76) | 8.4 (0.60) | 5.9 (0.53) |
| 2015 | 24.1 (1.13) | 40.0 (1.50) | 56.1 (1.47) | 3.9 (0.44) | 19.8(1.28) | 8.7 (0.62) | 5.9 (0.51) | 5.6 (0.48) |
| 2016 | 23.7 (1.23) | 40.3 (1.33) | 55.3 (1.25) | 4.3 (0.48) | 21.0(1.16) | 8.5 (0.76) | 5.6 (0.57) | 5.2 (0.55) |
| 2017 | 21.2 (1.19) | 40.8 (1.49) | 56.0 (1.44) | 3.2 (0.40) | 22.8 (1.35) | 6.3 (0.58) | 6.0 (0.60) | 5.6 (0.47) |
| 2018 | 16.2 (1.12) | 36.8 (1.35) | 60.2 (1.36) | 3.0 (0.33) | 23.6 (0.94) | 4.9 (0.53) | 4.4 (0.48) | 3.9 (0.52) |
| 2019 | 18.2 (1.28) | 37.3 (1.33) | 59.2 (1.43) | 3.5 (0.52) | 22.7 (1.20) | 5.6 (0.67) | 4.8 (0.50) | 4.2 (0.42) |
| p (linear, quadratic)a | <0.001, 0.060 | 0.002, 0.044 | <0.001, <0.001 | <0.001, 0.049 | <0.001, 0.228 | <0.001, 0.726 | <0.001, <0.001 | <0.001, <0.001 |
| Among respondents who had initiated both cigarettes and marijuana | ||||||||
| Years combined | 52.6 (0.57) | 30.3 (0.41) | 17.1 (0.42) | |||||
| By year | ||||||||
| 2000 | 70.1 (1.71) | 23.1 (1.54) | 6.9 (0.84) | |||||
| 2001 | 70.0 (1.76) | 23.4 (1.61) | 6.6 (0.82) | |||||
| 2002 | 66.5 (1.51) | 25.2 (1.45) | 8.4 (1.02) | |||||
| 2003 | 62.9 (1.60) | 26.5 (1.33) | 10.6 (1.03) | |||||
| 2004 | 59.0 (1.72) | 27.1 (1.42) | 13.9 (1.10) | |||||
| 2005 | 55.6 (1.60) | 31.0 (1.61) | 13.4 (1.13) | |||||
| 2006 | 51.4 (1.76) | 30.2 (1.63) | 18.4 (1.61) | |||||
| 2007 | 52.0 (1.84) | 33.3 (1.55) | 14.7 (1.26) | |||||
| 2008 | 50.7 (1.92) | 32.4 (1.64) | 16.9 (1.30) | |||||
| 2009 | 49.5 (1.76) | 33.3 (1.54) | 17.2 (1.49) | |||||
| 2010 | 44.0 (1.65) | 36.5 (1.66) | 19.4 (1.60) | |||||
| 2011 | 45.2 (1.96) | 34.9 (1.54) | 19.9 (1.71) | |||||
| 2012 | 44.8 (1.92) | 33.7 (1.47) | 21.6 (1.59) | |||||
| 2013 | 42.8 (2.11) | 33.6 (1.95) | 23.7 (1.77) | |||||
| 2014 | 40.6 (2.55) | 34.9 (1.87) | 24.5 (2.13) | |||||
| 2015 | 43.3 (2.09) | 29.0 (2.03) | 27.7 (2.13) | |||||
| 2016 | 44.1 (2.60) | 29.1 (2.27) | 26.8 (2.68) | |||||
| 2017 | 35.2 (2.44) | 33.5 (2.36) | 31.3 (2.18) | |||||
| 2018 | 37.0 (3.05) | 33.5 (2.65) | 29.5 (2.97) | |||||
| 2019 | 38.2 (3.34) | 32.7 (2.64) | 29.0 (2.58) | |||||
| p (linear, quadratic)a | <0.001, <0.001 | <0.001, <0.001 | <0.001, 0.001 | |||||
Notes: n indicates unweighted number of cases
(unweighted) = 78,252, all 12th grade respondents; 21,406 among cigarette and marijuana initiates
a
p values obtained from bivariate logistic regression models using both centered linear and quadratic terms