Hind M. AlOsaimi. Department of Pharmacy Services Administration, King Fahad Medical City, Riyadh Second Health Cluster, Riyadh, Saudi Arabia.
Rawabi Saad. Department of Medicine, Tabuk University , Tabuk, Saudi Arabia.
Turki G. Alalyani. Irada and Mental Health Complex, Ministry of Health, Al-Baha, Saudi Arabia. tgalalyani@moh.gov.sa
Shatha S. Al-Majnooni. Department of Pharmaceutical Practices, Umm Al-Qura University, Makkah, Saudi Arabia.s442000457@st.uqu.edu.sa
Kadi S. Alsubaie. College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh Saudi Arabia.442012885@sm.imamu.edu.sa
Amnnah A. Aljuwaiser. Department of Medicine, Aberdeen, Scotland, United Kingdom; amnnahaljuwaiser@gmail.com
Sarah J. Al-Marashi. Department of Medicine, Taibah University, Madinah, Saudi Arabia.tu4052974@taibahu.edu.sa
Raghad F. Aljeaid. Department of Medicine, Almaarefa University, Riyadh, Saudi Arabia. 181220098@student.um.edu.sa
Rahaf A. Alzaidi. Faculty of Medicine, University of Jeddah, Jeddah, Saudi Arabia.2005983@uj.edu.sa
Abeer S. Almutairi. Social worker Department , Northern Area Armed Forces Hospital, King Khalid Military, Hafr Al Batin 31991 , Kingdom of Saudi Arabia
Razan S. Alsheikh. Department of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia. razanalshaikh112@gmail.com
Deema S. Alkahmous. Department of Pharmacy, Almaarefa University, Diriyah, Saudi Arabia; 182220490@student.um.edu.sa
Abdularhman R. Almudayhish. Department of Pharmacy, Almaarefa University, Diriyah, Saudi Arabia; 191120140@student.um.edu.sa
Faisal M. Alanazi. College of Pharmacy, Northern Border University, Rafha, Saudi Arabia; fasialmeshal@gmail.com
Mohammed Kanan*. Department of Pharmaceutical Care, Rafha General Hospital, Rafha, Saudi Arabia. Mokaalshammari@moh.gov.sa
Abstract
Introduction: Patient-reported outcomes in pharmaceutical therapy play a crucial role in understanding medication experiences and their impact on quality of life among chronic disease patients. This study aims to explore patient-reported outcomes in pharmaceutical therapy among chronic disease patients in Saudi Arabia, with a focus on medication experiences and their impact on quality of life. Methods: The study utilized a cross-sectional design, collecting self-reported data from participants recruited primarily from healthcare settings. Participants completed the PROMPT-QOL questionnaire, which assessed various domains related to medication use and quality of life. Results: The findings revealed positive attitudes towards medication use and perceived effectiveness among participants. However, they also reported experiencing various side effects and impacts, particularly in intimate aspects of life such as sexual desire or relationships, vision, hearing, speech, and social activities. Notably, participants placed significant value on clear and comprehensive medication information, indicating the importance of patient education in promoting adherence and satisfaction. Conclusion: The study underscores the critical role of effective information provision and holistic patient care in optimizing pharmaceutical therapy outcomes. Healthcare providers should prioritize patient education, foster therapeutic relationships, and involve patients in shared decision-making to enhance treatment outcomes and overall quality of life for chronic disease patients. Additionally, longitudinal and comparative studies are needed to further explore medication experiences and healthcare disparities across different populations and settings.
Keywords: PROMPT-QOL questionnaire, patient education, pharmaceutical therapy, foster therapeutic relationships, quality of life
INTRODUCTION
Pharmaceutical therapy is the treatment of diseases with drugs other than surgery or radiation therapy. Pharmaceutical services and products play an important role in improving patient’s outcome and quality of life1,2. While pharmaceutical therapy holds immense potential for improving health outcomes, it also presents challenges and complexities that extend beyond mere efficacy and safety considerations. Understanding the holistic impact of pharmaceutical therapy on patients’ lives, encompassing their subjective experiences, perceptions, and overall well-being, is crucial for optimizing healthcare delivery and enhancing patient-centered care. Pharmaceutical therapy may be effective in reducing complications and in improving the quality of life of patients but undesirable effects like irrational drug use, adverse drug reaction or side effects, drug interactions, medication error, fear, inconvenience or medication non-adherence may be caused by pharmaceutical therapy3,4. These drug related problems may lead to treatment failure, more illness and increase health expenditure to the patients5,6. People understand the need of medicine use for chronic conditions, yet problems can occur during the treatment with medicine use7 . Some drugs have narrow therapeutic index, they cause toxicity at low doses so it is necessary to administer them at low effective dose. In elder patients, due to ageing process distribution and excretion of drugs is affected because of physiological changes. Liver size decreases with age, so the liver blood flow and excretion of drug is impaired so reduce the dose of narrow therapeutic index drugs and monitor the therapy8 . Patients having chronic hepatic diseases have poor quality of life. Patients with liver disease suffer from depression and their quality of life is affected9 . Kidney disorder can be acute and chronic, drug use in this state can be harmful. Kidney patients are affected by comorbid diseases and they are mostly prescribed many medicines. Due to ageing process, some drug interactions occur so risk of adverse drug reaction is more in elderly patients with kidney disease. Compliance problem is common among them10. Compliance to the pharmaceutical therapy is also important. According to the literature clinical guidelines and specialists care may lead to the better disease management, but also create burdensome to the patients by prescribing multiple medicines and this increasing use of medicines lead to the problems. Polypharmacy in elderly result in increased cognitive dysfunction that has adverse effects on mood and social functioning. Long term use of these medicines may provide not direct positive feedback in term of efficacy, but adverse effects including difficulties distress or place a burden on patients, so long term use of medicines adversely affects the quality of life11. Some patients hold negative views toward medicines, resisting in taking medicine because of dependence or harm but there also exist positive views about it. People have less knowledge of their disease, mode of transmission, diagnosis and treatment. There is need to educate the people and aware them about it to reduce the prevalence rate and complications12.
Measurement of treatment outcomes from the patient’s perspective are termed patient reported outcome measures5 . In the ever-evolving landscape of healthcare, the pursuit of patient-centered care and the optimization of patient wellbeing have become paramount13. The concept of patientreported outcome measures (PROs) has gained prominence in contemporary healthcare, emphasizing the importance of incorporating patients’ perspectives and voices into clinical decision-making and healthcare delivery. PROs provide a comprehensive assessment of various dimensions of patients’ lives, including physical, emotional, social, and functional well-being, thereby offering insights beyond traditional clinical endpoints. Within the realm of pharmaceutical therapy, PROs serve as invaluable tools for assessing the effectiveness, tolerability, and overall impact of medications from the patient’s standpoint14. A health care provider should understand the drug related needs of the patient. Things that should be considered are safety, effectiveness, indications and ease so that drug related problems can be solved and patient’ s quality of life can be improved15. Patient reported outcomes are helpful in understsnding the needs of the patient and also for improving their quality of life16. There are different instruments for measuring quality of life e.g. quality of life scale (QLS), quality of life interview (QOLI), Wisconsin quality of life index (W-QLI), Quality of life depression scale (QLDS), Quality of life inventory(QOLI), Medical outcome study shortform 36items (SF-36), World health organization quality of life instrument (WHOQOL) etc. These insruments measure quality of life in difeerent ways. Quality of life includes physical, psychological and social aspects17. For asessing quality of life and effects of pharmaceutical therapy on patients lives, patient reported outcome measures technique has been used. For pharmaceutical therapy, Hepler and Strand and Cipolle at al conducted a study to improve patient’s health related quality of life (HRQoL). Health related quality of life can be measured by using either generic disease specific instruments. Existing tools are not enough to assess the impact of medication therapy5 . Murawski and Bentley in the US conducted a study on pharmaceutical therapy related quality of life containing 33 items in 2001 but the study has low validity and less understandability to the patients1 . Renberg and his Swedish team also conducted a study related to patient therapy related quality of life but this study also has low validity because patients had not understood the questions. The two other approaches including short form survey (SF-36) and patient generated index (PGI) were also used to measure health related quality of life (HRQoL). PGI helped health care practitioner to identify, evaluate and resolve health related problems and outcomes of pharmaceutical care provision1,18. Responsiveness, precision and relevancy led to the evaluation of pharmaceutical therapy-related quality of life (PTRQoL). PTRQoL will improve our ability to recognize differences in impact on patient’s HRQoL that will further allow new meaningful exploration into patient’s tolerance and compliance and will permit the practitioner to identify patient’s problems with therapy readily and efficiently. PTRQoL fill the gap in outcome measures applicable to pharmaceutical realm. Health-related quality of life (HRQoL), having evolved during the last 20 years or so, as a health outcome is relatively new19. Health-related quality of life (HRQoL) plays an important role in patient’s life for recognition of impact of disease and treatment on psychological, social and physical functioning. HRQoL is an important step of medication therapy management (MTM) for medication therapy review. Short-form health survey (SF-36) is one of the most widely used HRQoL measures that are not sensitive enough to recognize the pharmacist’s interventions or pharmaceutical care (PC) impacts on patient’s life. Pharmacists can play their role in improving quality of life of the patients by informing and educating them about medicine effects and side effects20.
Saudi Arabia has experienced remarkable growth and development in its healthcare sector over the past few decades. This progress is marked by advancements in medical technologies, increased access to healthcare services, and improvements in healthcare infrastructure21. However, as the Kingdom continues to evolve, so do the expectations and demands of its citizens when it comes to healthcare. One of the key pillars of healthcare excellence is the emphasis on patient-centered care, a concept that has gained considerable traction in recent years. To achieve this, understanding how patients experience the effects of pharmaceutical therapy on their quality of life is paramount. Given the diverse population and healthcare landscape in Saudi Arabia, it is crucial to tailor healthcare interventions to meet the specific needs and preferences of its citizens. This study aims to delve into the assessment of Patient-Reported Outcome Measures of Pharmaceutical Therapy for Quality of Life (PROPMPT-QOL) in Saudi Arabia, shedding light on the significance of this research, its objectives, and the methodology to be employed.
METHOD
STUDY DESIGN AND DURATION
An observational study was conducted over a period of 10 months, to assess Patient Reported Outcome Measures of Pharmaceutical Therapy for Quality of Life (PROPMPT-QOL) among the Saudi population.
STUDY PARTICIPANTS
Patients with a disease duration of more than 3 months were enrolled in the study. Participants were recruited from various healthcare settings, including clinics, hospitals, community pharmacies, and the community itself. The recruitment process involved identifying potential subjects from hospital medical records and community pharmacy prescription records. These individuals were included in the study based on predefined inclusion and exclusion criteria.
INCLUSION CRITERIA
The study’s inclusion criteria encompassed individuals aged 18 years and above, with a disease duration exceeding three months, and currently undergoing medication for more than three months. No restrictions were imposed based on gender, ethnicity, or mental health status. Additionally, participants were required to demonstrate a willingness to provide informed consent, ensuring their voluntary participation in the research.
DATA COLLECTION
Data collection for this study utilized the PROMPT-QOL questionnaire. This questionnaire was developed drawing upon theories related to pharmaceutical therapy-related quality of life (PTRQoL), quality of life (QOL), and healthrelated quality of life (HRQoL). The questionnaire comprised nine domains with a total of 43 questions, covering various aspects of patients’ experiences with pharmaceutical therapy. Within these domains, participants were assessed for the impact of medication on various facets of their lives, including mobility, exertion, pain, sleep, skin, appearance, vision, hearing, speech, digestion, excretion, memory, eating, daily activities, and social interactions. Psychological impacts were evaluated by examining medicine interactions, adverse effects on body organs, medicine resistance, medicine dependence, polypharmacy, changes in medication type or strength, comfort with taking medication in front of others, feelings of boredom regarding regular medication intake, and perceived health status. Questions related to convenience and availability focused on aspects such as appropriate dosage forms, ease of carrying medication, medication availability, medicationrelated expenses, medication quality, service process, and waiting times. To gauge overall quality of life, participants were asked about their satisfaction with medication use, overall happiness, and perceived improvements in their daily lives.
TRANSLATION AND VALIDITY
For participants who primarily spoke Arabic, the English version of the PROMPT-QOL questionnaire (9 items) was translated into Arabic, the national language of Saudi Arabia, by a qualified linguist. Subsequently, the translated version was back-translated into English to ensure content accuracy and concordance in meaning between the two versions. Content validity was assessed, and construct validity was established through factor analysis.
DATA ANALYSIS
Data analysis was conducted using GraphPad Prism 5 and IBM SPSS Statistics (version 21). Descriptive statistics, including frequency distributions for categorical variables, were generated. The mean score was also computed. Reliability of the questionnaire was assessed using Cronbach’s alpha, which indicates the degree to which items within a set are closely related. This analysis was performed using the reliability command in SPSS. All data were analyzed to address the research objectives and hypotheses outlined in this study.
RESULTS
Table 1 presents the basic demographic data of the study participants. The majority of participants were between the ages of 18-27 (43.0%), with smaller proportions in the older age groups. Female participants comprised 74.4% of the sample, and the majority resided in urban areas (87.8%). Regarding education, most participants had completed university education (76.7%), followed by tertiary education (16.7%) and secondary education (3.5%). The largest proportion of participants were unemployed (42.7%) or employed in government positions (40.2%). Approximately 58.2% of participants lived with their families, and a similar percentage reported a monthly income of less than 10000. A significant portion of the participants reported suffering from chronic diseases (42.3%) and were currently on medications (55.6%). The majority were taking between 1-3 medications (75.1%), with smaller percentages taking 4-6 or more than 6 medications. When asked about their preference for health care consultation, most participants preferred consulting physicians (74.9%) over pharmacists or self-medication. In terms of sources of medicine-related information, physicians were the primary source (54.4%), followed by pharmacists and the internet. Regarding forms of medicine, the majority used Western medicine exclusively (47.2%), while a smaller percentage used both Western and alternative forms such as yoga (30.8%).
The analysis revealed notable trends in PROPMPT-QOL. Among the highest scores observed, the domain of Medicine Information and Disease Information garnered significant attention, with the Reasons for Using Medicines Regularly scoring the highest at 2.87, followed closely by How to Use Medicines at 2.77 and Indication at 2.60. These results underscore the importance of clear and comprehensive information provision in pharmaceutical therapy, indicating that patients place considerable value on understanding the purpose and proper administration of their medications. Conversely, the lowest scores were observed in the domain of Impacts of Medicine and Side Effects, particularly in categories related to intimate aspects of life. Sexual Desire or Relationship scored the lowest at 0.94, while Vision, Hearing, or Speech and Daily Activities or Socializing with Others scored marginally higher at 1.08 and 1.10, respectively. These findings suggest that medications may have a significant impact on various aspects of patients’ lives, particularly in areas related to personal relationships and daily functioning. These findings suggest that chronic disease patients generally have positive attitudes towards medication use and perceive medications as effective. However, they also experience various side effects and impacts, highlighting the importance of considering holistic approaches to patient care. Additionally, the convenience, availability, and therapeutic relationships with healthcare providers play significant roles in patients’ medication experiences and overall quality of life.
DISCUSSION
This study on PROPMPT-QOL among the Saudi population provides significant insights into how patients perceive and engage with their medication regimens, particularly in terms of information provision and the impact on various aspects of life. The findings indicate a strong preference among participants, primarily young, educated females, for obtaining medicationrelated information from physicians, underscoring the crucial role healthcare providers play in patient education and support. Studies have shown that people who consulted physicians and traditional practitioner have good quality of life22. Patients commonly obtain information from various sources, with the internet and printed material being predominant, leading to improvements. The internet offers extensive information accessibility, including medicine-related details23. Patients interact with existing material and healthcare providers, enhancing their understanding of diseases and medications; however, ensuring the validity of information is paramount24.
The results of this study highlight several important aspects of medication use among chronic disease patients in Saudi Arabia. Across the domains assessed, participants generally exhibited positive attitudes towards medication use and perceived medications as effective. However, they also reported experiencing various side effects and impacts, underscoring the complex nature of pharmaceutical therapy. Comparing these findings with previous studies provides valuable insights into the consistency and variability of medication experiences across different populations and healthcare systems. For instance, a study by Krijnen et al. (2005) on patients with hypertension and renal artery stenosis found similar trends in medication effectiveness, with participants reporting positive outcomes in symptom relief and disease cure2 . This consistency suggests that perceptions of medication efficacy may be relatively stable across different disease conditions. However, differences may arise in the prevalence and severity of medication side effects and impacts. For example, a study by Neame and Hammond (2005) on patients with rheumatoid arthritis found a higher prevalence of adverse effects on body organs and changes in medicine type or strength compared to the current study7 . This disparity could be attributed to differences in the types of chronic diseases studied and the pharmacological interventions employed. Moreover, variations in healthcare systems and cultural contexts may influence patients’ perceptions and experiences of medication use. A study by Sakthong et al. examined medication therapy-related quality of life among Thai patients and found differences in medication convenience and availability compared to the current study in Saudi Arabia25,26. These differences underscore the importance of considering cultural and contextual factors in designing patient-centered healthcare interventions.
The high scores in the domains of Medicine Information and Disease Information, particularly regarding the reasons for using medicines regularly, how to use them, and their indications, highlight the importance patients place on understanding their treatments. This emphasis on clear and comprehensive medication and disease information aligns with previous studies which have demonstrated that well-informed patients are more likely to adhere to their medication regimens, thereby improving treatment outcomes27,28. The positive correlation between quality information provision and patient adherence suggests that enhancing patient education could be a key strategy in optimizing pharmaceutical therapy outcomes29. Conversely, the lower scores in the domains related to the impacts of medication and side effects, especially concerning intimate aspects of life such as sexual desire or relationships, vision, hearing, speech, and social activities, point to significant areas for improvement in patient care. These findings resonate with studies who reported that side effects and impacts on daily living are among the most common reasons for nonadherence to medication30,31. The results thus underscore the need for healthcare providers to address these concerns proactively, ensuring that patients are fully aware of potential side effects and equipped with strategies to manage them. The study’s revelations about the negative impacts of medication on personal and social aspects of patients’ lives also call for a more holistic approach to patient care, one that goes beyond treating the disease to encompass the overall well-being of the patient.
The findings of this study have several implications for healthcare practice in Saudi Arabia. Firstly, healthcare providers should prioritize patient education and counseling to address medication-related concerns and promote adherence. This may involve providing clear and comprehensive information about medication use, side effects, and management strategies. Secondly, efforts should be made to improve the convenience and accessibility of medications, particularly in rural areas where access to healthcare services may be limited. This could involve enhancing medication distribution systems, reducing medication costs, and expanding telehealth services for remote consultations. Furthermore, fostering therapeutic relationships between patients and healthcare providers is essential for promoting trust, communication, and shared decision-making. Healthcare professionals should strive to engage patients in their care by addressing their concerns, respecting their preferences, and involving them in treatment decisions. In terms of future research, longitudinal studies are needed to explore the long-term effects of medication use on patients’ quality of life and clinical outcomes. Additionally, comparative studies across different populations and healthcare settings can provide valuable insights into the factors influencing medication experiences and healthcare disparities.
Several limitations need to be acknowledged in this study. Firstly, the cross-sectional design prevents establishing causal relationships between medication experiences and quality of life outcomes over time. Secondly, reliance on self-reported data may introduce recall and social desirability biases. Additionally, the study’s sample, recruited primarily from healthcare settings, may not fully represent all chronic disease patients in Saudi Arabia. Language and literacy barriers may have excluded individuals with limited proficiency in English or Arabic, impacting the generalizability of findings. Furthermore, the PROMPT-QOL questionnaire’s domains may not encompass all relevant aspects of pharmaceutical therapy-related quality of life. Finally, the response rate and potential selection bias were not reported, further limiting the study’s external validity.
CONCLUSION
In conclusion, this study contributes significantly to our understanding of patient-reported outcomes in pharmaceutical therapy, emphasizing the critical importance of effective information provision and the need to address the holistic impacts of medications on patients’ lives. By focusing on these areas, healthcare providers can enhance patient adherence, satisfaction, and overall quality of life, ultimately improving treatment outcomes for individuals with chronic conditions.
CONFLICT OF INTEREST
The authors declare no conflicts of interest.
AKNOWLEDGMENT:
The authors would like to thank the Research Center at King FahadMedical City, Riyadh R2, Second Health Cluster, for the valuable and technical support provided for the manuscript.
References
1. BENTLEY, J.P. Pharmaceutical Therapy-Related Quality of Life: Conceptual Development. Journal ot Social and Administrative Pharmacy Vol 2001, 18.
2. Krijnen, P.; Van Jaarsveld, B.; Hunink, M.; Habbema, J. The effect of treatment on health-related quality of life in patients with hypertension and renal artery stenosis. Journal of human hypertension 2005, 19, 467-470.
3. Krähenbühl-Melcher, A.; Schlienger, R.; Lampert, M.; Haschke, M.; Drewe, J.; Krähenbühl, S. Drug-related problems in hospitals: a review of the recent literature. Drug safety 2007, 30, 379-407.
4. Hanlon, J.T.; Lindblad, C.I.; Gray, S.L. Can clinical pharmacy services have a positive impact on drug-related problems and health outcomes in community-based older adults? The American journal of geriatric pharmacotherapy 2004, 2, 3-13.
5. Sakthong, P.; Suksanga, P.; Sakulbumrungsil, R.; Winit-Watjana, W. Development of Patient-reported Outcomes Measure of Pharmaceutical Therapy for Quality of Life (PROMPT-QoL): A novel instrument for medication management. Research in Social and Administrative Pharmacy 2015, 11, 315-338.
6. de Freitas, G.R.M.; Tramontina, M.Y.; Balbinotto, G.; Hughes, D.A.; Heineck, I. Economic impact of emergency visits due to drug-related morbidity on a Brazilian hospital. Value in Health Regional Issues 2017, 14, 1-8.
7. Neame, R.; Hammond, A. Beliefs about medications: a questionnaire survey of people with rheumatoid arthritis. Rheumatology 2005, 44, 762-767.
8. Hanlon, J.T.; Shimp, L.A.; Semla, T.P. Recent advances in geriatrics: drug-related problems in the elderly. Annals of Pharmacotherapy 2000, 34, 360-365.
9. Silva, L.D.; da Cunha, C.C.; da Cunha, L.R.; Araújo, R.F.; Barcelos, V.M.; Menta, P.L.; Neves, F.S.; Teixeira, R.; Rocha, G.A.; Gontijo, E.D. Depression rather than liver impairment reduces quality of life in patients with hepatitis C. Revista Brasileira de Psiquiatria 2015, 37, 21-30.
10. Ponticelli, C.; Sala, G.; Glassock, R.J. Drug management in the elderly adult with chronic kidney disease: a review for the primary care physician. In Proceedings of the Mayo Clinic Proceedings, 2015; pp. 633-645.
11. Krska, J.; Morecroft, C.W.; Poole, H.; Rowe, P.H. Issues potentially affecting quality of life arising from long-term medicines use: a qualitative study. International journal of clinical pharmacy 2013, 35, 1161-1169.
12. Heydari, A.; Ziaee, E.S.; Gazrani, A. Relationship between awareness of disease and adherence to therapeutic regimen among cardiac patients. International journal of community based nursing and midwifery 2015, 3, 23.
13. Epstein, R.M.; Street, R.L. The values and value of patient-centered care. Annals Family Med 2011, 9, 100-103.
14. Chow, A.; Mayer, E.K.; Darzi, A.W.; Athanasiou, T. Patient-reported outcome measures: the importance of patient satisfaction in surgery. Surgery 2009, 146, 435-443.
15. Saarni, S.I.; Härkänen, T.; Sintonen, H.; Suvisaari, J.; Koskinen, S.; Aromaa, A.; Lönnqvist, J. The impact of 29 chronic conditions on health-related quality of life: a general population survey in Finland using 15D and EQ-5D. Quality of Life Research 2006, 15, 1403-1414.
16. Rothman, M.L.; Beltran, P.; Cappelleri, J.C.; Lipscomb, J.; Teschendorf, B.; Group, M.F.P.-R.O.C.M. Patient-reported outcomes: conceptual issues. Value in Health 2007, 10, S66-S75.
17. Berlim, M.T.; Fleck, M. “ Quality of life”: a brand new concept for research and practice in psychiatry. Revista Brasileira de Psiquiatria 2003, 25, 249-252.
18. Sakthong, P.; Sakulbumrungsil, R.; Winit-Watjana, W. Medication-therapy-related quality of life measurement using the patient-generated index: a pilot study. Int J Pharm Pharm Sci 2013, 5, 153-156.
19. Kheir, N.M.; van Mil, J.F.; Shaw, J.P.; Sheridan, J.L. Health-related quality of life measurement in pharmaceutical care Targeting an outcome that matters. Pharmacy World and Science 2004, 26, 125-128.
20. Arun, K.; Murugan, R.; Kanna, M.; Rajalakshmi, S.; Kalaiselvi, R.; Komathi, V. The impact of pharmaceutical care on the clinical outcome of diabetes mellitus among a rural patient population. International journal of diabetes in developing countries 2008, 28, 15.
21. Young, Y.; Alharthy, A.; Hosler, A.S. Transformation of Saudi Arabia’s health system and its impact on population health: what can the USA learn? Saudi Journal of Health Systems Research 2021, 1, 93-102.
22. Björndell, C.; Premberg, Å. Physicians’ experiences of video consultation with patients at a public virtual primary care clinic: a qualitative interview study. Scandinavian Journal of Primary Health Care 2021, 39, 67-76.
23. Yaacoub, J.-P.A.; Noura, M.; Noura, H.N.; Salman, O.; Yaacoub, E.; Couturier, R.; Chehab, A. Securing internet of medical things systems: Limitations, issues and recommendations. Future Generation Computer Systems 2020, 105, 581-606.
24. Baker, L.; Wagner, T.H.; Singer, S.; Bundorf, M.K. Use of the Internet and e-mail for health care information: results from a national survey. Jama 2003, 289, 2400-2406.
25. Sakthong, P.; Sonsa-Ardjit, N.; Sukarnjanaset, P.; Munpan, W. Psychometric properties of the EQ-5D-5L in Thai patients with chronic diseases. Quality of Life Research 2015, 24, 3015-3022.
26. Sakthong, P. Pharmacotherapy related quality of life in Thai patients with chronic diseases. International Journal of Clinical Pharmacy 2019, 41, 1004-1011.
27. DiMatteo, M.R.; Giordani, P.J.; Lepper, H.S.; Croghan, T.W. Patient adherence and medical treatment outcomes: a metaanalysis. Medical care 2002, 40, 794-811.
28. McDonald, H.P.; Garg, A.X.; Haynes, R.B. Interventions to enhance patient adherence to medication prescriptions: scientific review. Jama 2002, 288, 2868-2879.
29. Ingersoll, K.S.; Cohen, J. The impact of medication regimen factors on adherence to chronic treatment: a review of literature. Journal of behavioral medicine 2008, 31, 213-224.
30. Unni, E.J.; Sternbach, N.; Goren, A. Using the Medication Adherence Reasons Scale (MAR-Scale) to identify the reasons for non-adherence across multiple disease conditions. Patient preference and adherence 2019, 993-1004.
31. Mukhtar, O.; Weinman, J.; Jackson, S.H. Intentional non-adherence to medications by older adults. Drugs & aging 2014, 31, 149-157.