Table 2.
Treatment characteristics by young and older adults who had no prior substance use treatment history
| Unmatched (N=817) |
Matched (N=282) |
|||||
|---|---|---|---|---|---|---|
| Young adults | Older adults |
p value* |
Young adults |
Older adults |
p value* |
|
| (N=146) | (N=671) | (N=141) | (N=141) | |||
| Index (first) substance use treatment | ||||||
| Length of stay (LOS) in weeks, mean (SD) | 5.6 (9.8) | 10.9 (15.3) | <0.0001 | 5.8 (9.9) | 8.8 (14.4) | 0.0414 |
| Additional treatment services, years 2–11 | ||||||
| % having readmissions within or outside the health plan in: | ||||||
| Years 2–5 | 11.0 | 13.1 | 0.4788 | 10.6 | 11.4 | 0.8790 |
| Years 6–7 | 9.6 | 5.8 | 0.0931 | 9.2 | 6.4 | 0.3745 |
| Years 8–9 | 5.5 | 2.5 | 0.1054 | 5.7 | 4.3 | 0.5835 |
| Years 10–11 | 7.5 | 3.0 | 0.0152 | 7.8 | 5.0 | 0.3298 |
| % having readmissions within or outside the health plan as needed in: | ||||||
| Years 2–5 | 40.0 | 54.8 | 0.0027 | 40.8 | 55.5 | 0.0236 |
| Years 6–7 | 36.8 | 48.4 | 0.0194 | 37.5 | 49.5 | 0.0662 |
| Years 8–9 | 28.3 | 41.7 | 0.0074 | 29.3 | 41.9 | 0.0504 |
| Years 10–11 | 39.3 | 42.4 | 0.5499 | 39.8 | 41.1 | 0.8571 |
| % having psychiatric services within or outside in: the health plan | ||||||
| Years 2–5 | 21.9 | 26.4 | 0.2629 | 22.0 | 19.9 | 0.6605 |
| Years 6–7 | 15.1 | 16.7 | 0.6313 | 14.2 | 9.2 | 0.1947 |
| Years 8–9 | 15.8 | 11.5 | 0.1529 | 16.3 | 9.2 | 0.0743 |
| Years 10–11 | 16.4 | 11.0 | 0.0682 | 17.0 | 10.6 | 0.1205 |
| % having psychiatric services within or outside the health plan as needed in: | ||||||
| Years 2–5 | 73.2 | 78.0 | 0.2485 | 73.0 | 74.0 | 0.8607 |
| Years 6–7 | 60.8 | 64.9 | 0.3893 | 60.8 | 61.5 | 0.9216 |
| Years 8–9 | 50.0 | 58.8 | 0.0825 | 50.9 | 62.9 | 0.0724 |
| Years 10–11 | 61.5 | 60.6 | 0.8465 | 62.0 | 65.0 | 0.6615 |
| % having 12-step meeting attendance in: | ||||||
| Years 2–5 | 33.6 | 31.7 | 0.6819 | 34.2 | 32.1 | 0.7413 |
| Years 6–7 | 23.5 | 31.2 | 0.1009 | 23.5 | 26.7 | 0.5854 |
| Years 8–9 | 29.9 | 28.1 | 0.6940 | 30.1 | 27.4 | 0.6662 |
| Years 10–11 | 28.3 | 27.8 | 0.9167 | 27.8 | 26.3 | 0.8064 |
| Mean (sd) of past-year 12-step meeting attendance in: | ||||||
| Years 2–5 | 29.9 (64.2) | 25.8 (58.8) | 0.4959 | 30.4 (65.0) | 21.9 (54.1) | 0.2882 |
| Years 6–7 | 33.2 (79.2) | 23.4 (55.9) | 0.2048 | 31.7 (76.4) | 21.8 (52.1) | 0.2594 |
| Years 8–9 | 40.3 (97.6) | 20.5 (54.5) | 0.0368 | 40.0 (97.7) | 23.6 (58.8) | 0.1544 |
| Years 10–11 | 31.1 (89.8) | 24.4 (66.3) | 0.4610 | 32.1 (91.7) | 24.0 (68.5) | 0.4690 |
Note:
*
p values from Chi-square or Fisher Exact tests for categorical variables, and T-tests for continuous variables.
SD = Standard Deviation.