Table 2. Demographic differences among trajectory groups.
| Nonpersistent light smokers N=26 | Nonpersistent moderate smokers N = 36 | Persistent moderate smokers N=94 | Persistent heavy smokers N=59 | |||||||||
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| Variables | M | SD | M | SD | M | SD | M | SD | ||||
| Maternal age | 23.3 | 3.2 | 23.8 | 6.6 | 24.0 | 4.7 | 24.7 | 5.5 | ||||
| Years of education* | 12.6a | 1.7 | 12.6 | 1.6 | 11.7b | 1.5 | 11.6b | 1.8 | ||||
| Age when first smoked | 16.6 | 1.4 | 15.3 | 3.2 | 15.6 | 3.1 | 14.7 | 3.1 | ||||
| Close relatives smoke* | 1.3a | .87 | 1.2 | .88 | 1.5 | .86 | 1.8b | .89 | ||||
| Friends smoke | 1.4 | 1.1 | 1.6 | 1.0 | 1.8 | 0.97 | 1.8 | 1.0 | ||||
| % white* | 23% | 39% | 29% | 51% | ||||||||
| % on TANF | 4% | 8% | 17% | 19% | ||||||||
| % on food stamps | 54% | 39% | 60% | 61% | ||||||||
| % on medicaid | 65% | 64% | 66% | 76% | ||||||||
| % working for pay* | 42% | 47% | 69% | 49% | ||||||||
| % married/cohabiting | 50% | 56% | 41% | 46% | ||||||||
| % with smoking partner | 54% | 75% | 71% | 78% | ||||||||
| % other household smokers | 15% | 11% | 27% | 32% | ||||||||
Note. Means with different superscripts were significantly different from each other.
*
Variables were significantly different across the groups at p < .05.