| Author | Patient | Method | Influence factor |
| Halding | 116 patients | Cross-sectional study | Individual differences, psychological factors |
| Hillebregt | 46 patients | Questionnaire | Lack of experience, Lack of support |
| Roberts | Patients in 4sample datasets | PAM-13 scale | Lack of external support, healthy state |
| Mullerova | 4343 patients | Cross-sectional study | High expectations of disease, poor health, lowsatisfaction |
| Stoilkova-Hartmann | 13 pulmonary rehabilitation personnel | CS-PAM scale | Social support, health belief, environment and lifestyle, internal motivation |