Table 3.
Examining Distributions of Source Class Membership as a Function of Selected Sociodemographic Characteristics
| Male adolescents %, (n)a |
Female adolescents %, (n)a |
pb | White %, (n)a |
Non-White %, (n)a |
pb | Both parents have less than a college degree %, (n)a |
At least one parent has a college degree %, (n)a |
pb | |
|---|---|---|---|---|---|---|---|---|---|
| Latent Classes of Sources | n=1544 | n=1691 | n=1550 | ||||||
| Friend/relative source (n=686) | 47.7% (297) | 52.3% (326) | p = .701 | 62.8% (431) | 37.2% (255) | p = .759 | 46.8% (294) | 53.2% (334) | p = .585 |
| Friend/purchased sources (n=478) | 57.9% (254) | 42.1% (185) | p < .001 | 69.7% (333) | 30.3% (145) | p = .003 | 44.0% (191) | 56.0% (243) | p = .106 |
| Own leftover prescription (n=286) | 37.2% (100) | 62.8% (169) | p < .001 | 61.9% (177) | 38.1% (109) | p = .618 | 48.0% (132) | 52.0% (143) | p = .916 |
| Multiple sources (n=128) | 44.6% (50) | 55.4% (62) | p = .524 | 59.1% (75) | 40.9% (52) | p = 381 | 49.5% (55) | 50.5% (56) | p = .760 |
| Other sources (n=111) | 45.5% (45) | 54.5% (54) | p = .625 | 47.7% (53) | 52.3% (58) | p = .003 | 67.0% (69) | 33.0% (34) | p < .001 |
Note: Data source was Monitoring the Future study, 2009-2016 cohorts.
a
Respondents can only be assigned to one class based on the latent class analysis. Comparisons are assessing differences between subgroups in the probability of belonging to each class separately (columns will add to approximately 100%; all estimates provided use weights).
b
p values are from Rao-Scott 2 x 2 chi-square tests12 comparing the row percentages (df = 1). Bold type indicates significant differences.