Table 1.
Descriptive statistics for youth in grades 9 to 12 by gender
| Total (n = 25,893) |
Male (n = 13,206) |
Female (n = 12,687) |
Chi-Square | |||||
|---|---|---|---|---|---|---|---|---|
| Student-Level Characteristics | % | (n)a | % | (n)a | % | (n)a | ||
| Smoking Status | Daily smoker | 9.5 | (2,377) | 9.5 | (1,214) | 9.4 | (1,163) | χ2 = 7.29, df = 2, p = 0.026 |
| Occasional smoker | 8.9 | (2,242) | 8.4 | (1,077) | 9.4 | (1,165) | ||
| Non-smoker | 81.6 | (20,522) | 82.1 | (10,470) | 81.2 | (10,052) | ||
| Susceptibility to smoking | Susceptible | 29.5 | (4,539) | 28.5 | (2,284) | 30.7 | (2,255) | χ2 = 8.48, df = 1, p = 0.004 |
| (never-smokers only) | Not Susceptible | 70.5 | (10,822) | 71.5 | (5,724) | 69.3 | (5,098) | |
| Has an older sibling who smokes | Yes | 29.0 | (4,998) | 28.1 | (2,485) | 30.0 | (2,513) | χ2 = 7.98, df = 1, p = 0.005 |
| No | 71.0 | (12,244) | 71.9 | (6,390) | 70.0 | (5,854) | ||
| Has a parent who smokes | Yes | 38.8 | (10,049) | 38.2 | (5,047) | 39.4 | (5,002) | χ2 = 3.98, df = 1, p = 0.046 |
| No | 61.2 | (15,844) | 61.8 | (8,159) | 60.6 | (7,685) | ||
| Number of close friends who smoke | None | 61.9 | (14,599) | 58.7 | (7,635) | 55.3 | (6,964) | χ2 = 53.80, df = 5, p < 0.001 |
| 1 | 8.1 | (1,922) | 14.7 | (1,916) | 15.9 | (2,006) | ||
| 2 | 10.9 | (2,581) | 9.4 | (1,224) | 10.8 | (1,357) | ||
| 3 | 7.0 | (1,659) | 6.1 | (799) | 6.8 | (860) | ||
| 4 | 4.5 | (1,058) | .7 | (479) | 4.6 | (579) | ||
| 5 | 7.6 | (1,787) | 7.4 | (957) | 6.6 | (830) | ||
| Grade | 9 | 27.7 | (7,168) | 27.7 | (3,664) | 27.6 | (3,504) | χ2 = 11.24, df = 3, p = 0.011 |
| 10 | 26.9 | (6,974) | 27.1 | (3,575) | 26.8 | (3,399) | ||
| 11 | 23.5 | (6,085) | 22.7 | (3,001) | 24.3 | (3,084) | ||
| 12 | 21.9 | (5,666) | 22.5 | (2,966) | 21.3 | (2,700) | ||
a Numbers may not add to total because of missing values or excluded cases