General characteristics of the study population
| Variables | Frequency | Proportion (%) |
| Sociodemographic characteristics | ||
| Age in years, mean (SD) | 23.4 (2.6) | |
| Gender | ||
| Male | 214 | 43.6 |
| Female | 277 | 56.4 |
| Institution | ||
| University of Yaoundé 1 | 149 | 30.3 |
| University of Buea | 95 | 19.3 |
| University of Douala | 26 | 5.3 |
| University of Bamenda | 136 | 27.7 |
| ISTM Yaoundé | 33 | 6.7 |
| ISSM Baganté | 31 | 6.3 |
| Catholic University, Kumbo | 21 | 4.4 |
| Academic Level, median (IQR) | 5.0 (4.0–7.0) | |
| Number of social media accounts | 3.0 (2.0–4.0) | |
| Type of social media account* | ||
| 491 | 100.0 | |
| 395 | 80.7 | |
| Google+ | 62 | 12.6 |
| Telegram | 35 | 7.1 |
| 220 | 44.8 | |
| Snapchat | 92 | 18.7 |
| 91 | 18.5 | |
| Others | 81 | 16.5 |
| Time spent on social media per day, median (IQR) | 4.0 (3.0–6.0) | |
| Past history | ||
| Family history of ADHD | ||
| Yes | 14 | 2.9 |
| No | 477 | 97.1 |
| Ever been diagnosed with ADHD? | ||
| Yes | 6 | 1.2 |
| No | 485 | 98.8 |
| Ever been diagnosed with learning disability | ||
| Yes | 3 | 0.6 |
| No | 488 | 99.4 |
| History of chronic disease | ||
| Yes | 46 | 9.4 |
| No | 445 | 90.6 |
| History of head injury | ||
| Yes | 41 | 8.4 |
| No | 450 | 91.6 |
| History of heart disease | ||
| Yes | 17 | 3.5 |
| No | 474 | 96.5 |
| Ever been told you snore in your sleep? | ||
| Yes | 184 | 37.5 |
| No | 307 | 62.5 |
| Recreational drug use | ||
| Yes | 37 | 7.5 |
| No | 454 | 92.5 |
| Type of recreational drug use (n=37) | ||
| Cannabis | 7 | 18.9 |
| Marijuana | 7 | 18.9 |
| Tramadol | 19 | 51.4 |
| Others | 4 | 10.8 |
| History of severe depression | ||
| Yes | 59 | 12.0 |
| No | 432 | 88.0 |
| History of anxiety disorder | ||
| Yes | 153 | 31.2 |
| No | 338 | 68.8 |
*Majority of the participants have more than one social media account.
ADHD, attention deficit/hyperactivity disorder; ISSM, Institut Supérieure des Sciences Médicale; ISTM, Institut Supérieure des Technologies Médicale.