Study authors | Duration between first and last data collection time-point | Year of first and last data time-point | % male | Age or grade range | Number of smokers | Definition of smoker | Number of quitters | % quitters | Program exposure? |
---|---|---|---|---|---|---|---|---|---|
Alexander et al., 1983 | 1 year | 1979–1980 | 50 | 10–12 year old students | 551 | Smoked in last month; approximately 10% of the sample had smoked in the last month at pretest | 242 | 44 | Yes |
Ary, Biglan, 1988 | 1 year | NR | 50 | Grades 7, 9, and 10 | 64 | Smoked in last week | 23 | 36 | No |
Chassin, Presson, Sherman, 1984 | 1 year | 1981–1982 | 50 | Grades 6–11 | 178 | Monthly; 77% were weekly smokers at pretest | 33 | 18.5 | No |
Chassin, Presson, Sherman, Edwards, 1991 | 7 years | 1980–1988 | 50 | Grades 6th through young adulthood (mean age at last wave = 21.8 years) | 1056 | Monthly smoking or greater; 27% of the sample were monthly smokers at pretest | 338 | 32 | No |
Chen, White, Pandina, in press | 7 years | 1985/87–1992/94 | 41 | 18, 21, 24 year old at baseline | 324 | Greater than 1 cpd | 57 | 18 | No |
Ellickson, McGuigan, Klein, in press | 5 years | 1990–1995 | 44 | 18 year old at baseline | 2151 | Smoked at cigarette within the last year | 1093 | 51 | Yes |
Green, 1979 | 5 years | 1974–1979 | NR | 12-to-18 year old at baseline | 1200 | NR | 324 | 27 | No |
Hansen, Collins, Johnson, Graham, 1985 | 3 months | 1981 | 32 | 15 to 16.5 yrs. | 392 | Identify as a "smoker" yes or no; Mean = 7 cigarettes per day at pretest | 129 | 33 | Yes |
Hansen, McNeal, under review | 1 year; a series of contiguous years | 1993–2000 | 48 | Grades 6–11 | 1894 | Monthly | 563 | 30 | No |
Laoye, Cresswell, Stone, 1972 | 2 years | 1966–1968 | 50 | Grades 7–10 | 375 regular smokers 830 occasional smokers | Regular – smoked every day Occasional – "once in a while" | 98 regular smokers/446 of full smoker sample | 26 regular smokers/37 of full smoker sample | No |
Paavola, Vartiainen, Puska, in press | 13 years | 1978–1993 | 49 | 15–28 year old; 15 year old at baseline | 183 | Occasional or daily smoking; occasional smoker equals less than once per month to 1–2 times per week; approximately 29% of the sample had smoked occasionally or daily at pretest (16%, daily) | 64 | 34 (26% of daily smokers, 46% of occasional smokers) | Yes |
Sargent, Mott, Stevens, 1998 | 3 years | 1987–1989 | 58 | 16–18 year old rural youth; 16 years old at baseline | 276 | Smoked in last month; approximately 20% of the sample had smoked in the last month at pretest; 55% were daily smokers | 79 | 29 | No |
Skinner, Massey, Krohn, Lauer, 1985 | 3 years | 1980–1982 | 50 | Grades 7–12 | 642; perhaps 96 (15%) were weekly smokers | Smoked once or twice | 96 | 15 | No |
Stein, Newcomb, Bentler, 1996 | 12 years | 1976–1988 | 29 | Grades 7–9 through young adulthood (mean age at last wave = 25.5 years) | 18 regular 259 triers or occasional | Ever tried smoking | 169 | 61 | No |
Sussman et al., unpublished data (Project TNT data) | 1 year | 1991–1992 | 50 | 8th grade at baseline | 76 | Weekly smoking; approximately 8% of the sample were weekly smokers at pretest | 28 | 37 | Yes |
Sussman et al., 1998 | 1 year | 1994–1995 | 58 | 14-to-19 year old (mean age = 16.7 years) | 593 | Smoked in last month; approximately 57% smoked within the last month at pretest | 125 | 21 | Yes |
Zhu et al., 1999 | 4 years | 1989–1993 | 53 | 12-to-19 year old at baseline | 633 | Smoked more than 100 cigarettes in life and in last 30 days; 60% were daily smokers; over all smokers mean of ~7.5 cpd | 99 | 16 | No |