Table 4.
Estimable covariates for the underlying full model by study and by mapping matrix pattern
| Study | N | Covariate position in the full model | Mapping matrix pattern | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |||
| 1+ | 348 | X | X | X | X | X | - | X | X | X | - | X | - | X | 1 |
| 2 | 230 | X | X | X | X | X | X | - | X | - | X | - | - | - | |
| 8a | 1486 | X | X | X | X | X | X | - | X | - | X | - | - | - | 2 |
| 8b | 2155 | X | X | X | X | X | X | - | X | - | X | - | - | - | |
| 8c | 600 | X | X | X | X | X | X | - | X | - | X | - | - | - | |
| 9 | 302 | X | X | X | - | X | X | X | X | X | X | X | X | X | 3 |
| 10.1 | 348 | X | X | X | - | - | - | X | X | - | - | X | - | - | 4 |
| 11 | 383 | X | X | X | - | - | X | - | X | X | X | - | X | - | 5 |
| 12 | 167 | X | X | X | X | X | - | X | X | X | - | X | - | X | 6 |
| 13/14 | 109 | X | X | X | X | - | X | X | X | X | X | X | - | X | 7 |
| 18 | 215 | X | X | X | X | X | X | - | X | X | X | - | X | - | 8 |
| 20 | 928 | X | X | X | X | - | - | X | X | - | - | X | - | - | 9 |
| 21 | 216 | X | X | X | X | X | X | X | X | X | X | X | X | X | 10 |
| 22 | 509 | X | X | X | - | X | - | X | X | - | - | X | - | - | 11 |
Notes. “X” indicates estimable parameters whereas “−” indicates inestimable parameters. Covariate in the full model are (0) Intercept; (1) Man (= 1 vs. woman = 0); (2) White (= 1 vs. non-white = 0); (3) First-year (= 1 vs. other = 0); (4) PBS (Estimated latent trait (θ) scores for utilizing protective behavioral strategies) at Baseline; (5) PF (stand-alone personalized feedback intervention) (= 1 vs. control = 0); (6) MI + PF (in-person motivational intervention with personalized normative feedback profile) (= 1 vs. control = 0); (7) LS (Linear slope of time in month); (8) QS (Quadratic slope of time in month); (9) LS × PF (vs. control); (10) LS × (MI + PF) (vs. control); (11) QS × PF (vs. control); (12) QS × (MI + PF) (vs. control). N represents sample size at baseline. += Study 1 did not have a control group, thus, PF served as a comparison group.