Positive effects | Medical users (N=254) | Misusers (N=441) | p-valueb | ||
---|---|---|---|---|---|
n (%) | 95%CI a | n (%) | 95%CI† | ||
Improved concentration | 231 (95.9) | 92.5-98.0 | 364 (89.0) | 85.6-91.9 | 0.002 |
Stay awake / study longer | 82 (34.0) | 28.1-40.4 | 235 (57.5) | 52.5-62.3 | <0.0001 |
Motivation to study | 115 (47.7) | 41.3-54.2 | 205 (50.1) | 45.3-55.0 | 0.6 |
More energy | 92 (38.2) | 32.0-44.6 | 204 (49.9) | 45.0-54.7 | 0.004 |
Improved results | 133 (55.2) | 48.7-61.6 | 170 (41.6) | 36.7-46.5 | 0.0008 |
Sport performance | 16 (6.6) | 3.8-10.§ | 14 (3.4) | 1.9-5.7 | 0.06 |
Other | 44 (17.4) | 12.3-22.6 | 46 (10.6) | 7.8-13.8 | 0.01 |