Focus: Thai CHB-21, Thai HLS-14; n=1,048 post-CAG.
Goals: Cut-off for cardiac outcomes; predictive accuracy vs risk scores.
Status: IRB-approved (2023–ongoing).
Principal Investigator: Aeckapholpholladet Detkaew.
Funding: Self-funded (no external grant support).

— Research Instruments —

1. CHB-21 – Cardiac Health Behavior Scale (Thai Version).
Developed under academic permission by Aeckapholpholladet Detkaew (Master’s Thesis, Burapha University, 2021).
- Back-translation reviewed and face-validated by the original developer. Included in Project I (IRB 2023). 

2. HLS-14 – Health Literacy Scale (Thai & Cardiac-Adapted Versions).
Developed under academic permission by Aeckapholpholladet Detkaew (2022).
- Back-translation reviewed and face-validated by the original developer. Included in Project I (IRB 2023).  

Focus: Thai PSQI, Thai Mini-MASQ, Thai PSS-10, Thai DMI, C-MRCI; n=1,040 post-CAG.
Goals: Cut-off for AF, mortality, major cardiac events.
Status: IRB-approved (2024–ongoing).
Principal Investigator: Aeckapholpholladet Detkaew.
Funding: Self-funded (no external grant support). 

— Research Instruments —

1. Mini-MASQ – Mini-Mood and Anxiety Questionnaire (Thai Version).
Developed under academic permission by Aeckapholpholladet Detkaew (2023), based on the original Mini-MASQ.
- Back-translation reviewed and face-validated by the original developers. Included in Project II (IRB 2024).  

2. DMI – Detkaew Medication-Adherence Index.
Developed by Aeckapholpholladet Detkaew (2024) as an original research instrument for evaluating real-world medication-taking behavior.
- Currently under validation in Project II (IRB 2024).

3. C-MRCI – Clinical and Medication Regimen Complexity Index.
Developed by Aeckapholpholladet Detkaew (2025) as a new research instrument conceptually derived from the MRCI framework to assess overall treatment complexity.
- Currently under validation in Project II (IRB 2024; Amendment 2025). 

4. PSQI – Pittsburgh Sleep Quality Index (Thai Version).
Thai version by Sitasuwan T et al. (2014), used under academic permission from the University of Pittsburgh (2023).
- Included in Project II (IRB 2024).

5. PSS-10 – Perceived Stress Scale (Thai Version).
Thai version authorized for academic use via MAPI Research Trust (RST Assessments LLC, 2023), with permission acknowledged from Sheldon Cohen.
- Included in Project II (IRB 2024). 

Focus: Thai IWPQ, Thai RQ, Thai POS Scale; n=400 working-age adults.
Goals: Cross-cultural comparison with Italy (n=302).
Status: IRB-approved (2025–ongoing).
Principal Investigator: Aeckapholpholladet Detkaew.
Funding: Self-funded (no external grant support).

— Research Instruments —

1. IWPQ – Individual Work Performance Questionnaire (Thai Version).
Developed under academic permission by Aeckapholpholladet Detkaew (2023) in collaboration with one of the original developers.
- Back-translation reviewed and face-validated by the original developers. Included in Project III (IRB 2025). 

2. RQ – Responsibility Questionnaire (Thai Version).
Developed under academic permission by Aeckapholpholladet Detkaew (2024), based on the original RQ.
- Back-translation reviewed and face-validated by the original developers. Included in Project III (IRB 2025).  

3. POS Scale – Perceived Occupational Stress Scale (Thai Version).
Developed under academic permission by Aeckapholpholladet Detkaew (2025) in collaboration with one of the original developers (listed as IRB co-investigator).
- Back-translation reviewed and face-validated by the original developer. Included in Project III (IRB 2025).