| Scale | Subscales | N items | Scale | Language |
| Personal Empowerment Scale [33] | Two subscales: Discretion and Reduction in Chance | 20 | 5-point Likert Scale | English |
| Mental Health Confidence Scale [12] | Three subscales: Optimism, Coping, Advocacy | 16 | 6-point Scale | English |
| Boston Empowerment Scale ―Version 2 [11] | Two super-ordinate factors: (i) Self-orientation: three sub-scales: Self-esteem, Self-efficacy, Optimism (ii) Community orientation: three subscales: Community action, Powerlessness, Effecting change | 25 | 4-point Likert Scale | English |
| Health Promotion Intervention Questionnaire―Original [34] | Four subscales: Alliance, Empowerment, Educational support, Practical support | 19 | 5-Point Likert Scale | Swedish |
| Empowerment Questionnaire for Inpatients (EQuIP)―Original [35] | No subscales reported (Expected sub-scales were information, choice, and communication, but CFA did not confirm this and EFA was not conducted) | 16 | 4-Point Likert Scale | English |
| Consumer Evaluation Of Mental Health Services (CEO-MHS)―Original [36] | Two subscales: Empowerment (consumers’ sense of control over their illness, treatment and stigma), Dehumanization | 26 | 5-Point Likert Scale | English |
| Inpatient Consumer Survey ―Original [37] | Six subscales: Outcome, Dignity, Rights, Participation, Environment, Empowerment (patient choice & communication) | 28 | 5-Point Likert Scale | English |