Table 4. Estimated Marginal Means for Between Subjects Effects Tests.
| 95% CONFIDENCE INTERVAL | ||||||
|---|---|---|---|---|---|---|
| DEPENDENT VARIABLE | IMPAIRING MEDICATION | STIMULANT USE GROUP | MEAN | STANDARD ERROR | LOWER BOUND | UPPER BOUND |
| Major Lapses (>1000 ms) | Aggregate | Taking Amphetamine | .123 | .076 | ‒.027 | 2.73 |
| Not Taking Amphetamine | .042 | .024 | ‒.006 | .090 | ||
| Opiates/Opioids | Taking Amphetamine | .167 | .105 | ‒.040 | .373 | |
| Not Taking Amphetamine | .037 | .035 | ‒.031 | .106 | ||
| Benzodiazepines | Taking Amphetamine | .143 | .097 | ‒.048 | .334 | |
| Not Taking Amphetamine | .031 | .045 | ‒.058 | .121 | ||
| Anticholinergics | Taking Amphetamine | 0 | .256 | ‒.506 | .506 | |
| Not Taking Amphetamine | 0 | .071 | ‒.140 | .140 | ||
| Polypharmacy | Taking Amphetamine | .182 | .077 | .029 | .334 | |
| Not Taking Amphetamine | .098 | .033 | .034 | .163 | ||
| Minor Lapses (500–1000 ms) | Aggregate | Taking Amphetamine | 2.007 | .324 | 1.368 | 2.646 |
| Not Taking Amphetamine | .708 | .103 | .504 | .912 | ||
| Opiates/Opioids | Taking Amphetamine | .933 | .447 | ‒.048 | 1.715 | |
| Not Taking Amphetamine | .704 | .149 | .410 | .997 | ||
| Benzodiazepines | Taking Amphetamine | 1.286 | .413 | .470 | 2.102 | |
| Not Taking Amphetamine | .594 | .193 | .212 | .997 | ||
| Anticholinergics | Taking Amphetamine | 5.000 | 1.094 | 2.841 | 7.159 | |
| Not Taking Amphetamine | .615 | .303 | .017 | 1.214 | ||
| Polypharmacy | Taking Amphetamine | .909 | .330 | .258 | 1.560 | |
| Not Taking Amphetamine | .918 | .140 | .642 | 1.194 | ||
| Mean Reaction Time (ms) | Aggregate | Taking Amphetamine | 281.756 | 8.900 | 264.192 | 299.321 |
| Not Taking Amphetamine | 265.038 | 2.845 | 259.424 | 270.652 | ||
| Opiates/Opioids | Taking Amphetamine | 255.000 | 12.282 | 230.763 | 279.237 | |
| Not Taking Amphetamine | 252.889 | 4.094 | 244.810 | 260.968 | ||
| Benzodiazepines | Taking Amphetamine | 273.571 | 11.371 | 251.132 | 296.011 | |
| Not Taking Amphetamine | 270.812 | 5.318 | 260.317 | 281.308 | ||
| Anticholinergics | Taking Amphetamine | 332.000 | 30.084 | 272.631 | 391.369 | |
| Not Taking Amphetamine | 269.385 | 8.344 | 252.919 | 285.851 | ||
| Polypharmacy | Taking Amphetamine | 266.455 | 9.071 | 248.554 | 284.355 | |
| Not Taking Amphetamine | 267.066 | 3.852 | 259.464 | 274.667 | ||