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  1. Tanvejsilp P, Taychakhoonavudh S, Chaikledkaew U, Chaiyakunapruk N, Ngorsuraches S
    Value Health Reg Issues, 2019 May;18:78-82.
    PMID: 30641410 DOI: 10.1016/j.vhri.2018.11.004
    OBJECTIVES: To describe the process, challenges, and future direction of health technology assessment (HTA), focusing on the drug selection of the National List of Essential Medicines (NLEM) in Thailand.

    METHODS: Literature and government documents were reviewed and analyzed by authors with experiences in HTA and drug policy in the country.

    RESULTS: The structure of HTA and its process in the drug selection of the NLEM were described, followed by the outcomes of the use of HTA. Examples of lowering drug prices, as a result of price negotiation using HTA, were presented. A few examples were also provided to demonstrate how decisions were made from considering factors beyond cost-effectiveness findings. Finally, challenges on various issues including improvement of HTA structure and process were discussed for the future direction of HTA in Thailand.

    CONCLUSIONS: HTA has been adopted as a tool for the drug selection of the NLEM to help Thailand achieve universal health coverage. Nevertheless, various challenges exist and need to be addressed.

  2. Jimam NS, Ismail NE, Dayom WD
    Value Health Reg Issues, 2020 Sep;22:15-22.
    PMID: 32007751 DOI: 10.1016/j.vhri.2019.08.478
    OBJECTIVES: To evaluate the validity and reliability of the 5-level EuroQol 5-dimensional questionnaire (EQ-5D-5L) through classical test theory and the Rasch measurement model.

    METHODS: Three hundred patients treated for uncomplicated malaria in selected primary healthcare facilities of Plateau state, Nigeria, completed the EQ-5D-5L scale. Classical test theory was used to establish validity and Cronbach's alpha reliability of the scale. Rasch analysis was used to confirm the unidimensionality, item fitness, item and person separations and reliabilities, and targeting of item difficulty to patient ability levels and presentation on Wright map (item-person map).

    RESULTS: The outcome of classical test theory revealed unidimensional scale with average variance extracted values > 0.5, and the square root of the average variance extracted for construct was greater than the correlation coefficients, indicating convergent and discriminant validities of the scale whose Cronbach's alpha coefficient (α) was 0.87. Rasch analysis indicated variance explained values of 88.3% and the eigenvalues of the first contrast was 1.3, further confirming the unidimensionality of the scale, whose fit index values were within accepted ranges. The high item and person separation and reliability values indicated the instrument's strength in detecting and evenly spreading items and persons on the Wright map based on item difficulty and the respondents' ability levels, respectively.

    CONCLUSION: The EQ-5D-5L scale performed well in uncomplicated malaria, hence, it is recommended for use in the assessment of health-related quality of life in this patient population.

  3. Teoh SL, Ngorsuraches S, Lai NM, Chaiyakunapruk N
    Value Health Reg Issues, 2021 May;24:167-172.
    PMID: 33714105 DOI: 10.1016/j.vhri.2020.09.003
    OBJECTIVES: Globally, nutraceuticals have been increasingly used. Nevertheless, the consumer preferences for nutraceuticals have not been quantitatively investigated. This study used discrete choice experiment (DCE) to examine consumer preferences and willingness to pay for nutraceuticals.

    METHODS: Four attributes (ie, the scientific proof of effectiveness, the scientific proof of safety, the source of recommendation, and cost) were identified from a systematic review and focus group interviews. They were used to develop a DCE questionnaire. Consumers at community pharmacies in Malaysia were asked to respond to 8 DCE choice sets. A conditional logit model was employed to obtain the relative importance of each attribute and to estimate respondents' WTP for nutraceuticals.

    RESULTS: A total of 111 valid responses were analyzed. A negative constant term in the developed model indicated that generally the respondents preferred not to use nutraceuticals before they considered the study attributes. The respondents preferred nutraceuticals with no side effect, clear evidence of effectiveness, and recommendation of a healthcare professional. The respondents were willing to pay $252/month more for nutraceuticals proven with no side effect than for those without proof of safety, and $102/month more for nutraceuticals proven with clear effectiveness than for those without proof of effectiveness.

    CONCLUSIONS: Consumers weighed relatively high on the availability of safety and effectiveness proofs when they chose nutraceuticals. The study highlights on the crucial need to inform consumers using clinical evidences of nutraceuticals as the information is highly preferred by consumers.

  4. Endarti D, Riewpaiboon A, Thavorncharoensap M, Praditsitthikorn N, Hutubessy R, Kristina SA
    Value Health Reg Issues, 2018 May;15:50-55.
    PMID: 29474178 DOI: 10.1016/j.vhri.2017.07.008
    OBJECTIVES: To gain insight into the most suitable foreign value set among Malaysian, Singaporean, Thai, and UK value sets for calculating the EuroQol five-dimensional questionnaire index score (utility) among patients with cervical cancer in Indonesia.

    METHODS: Data from 87 patients with cervical cancer recruited from a referral hospital in Yogyakarta province, Indonesia, from an earlier study of health-related quality of life were used in this study. The differences among the utility scores derived from the four value sets were determined using the Friedman test. Performance of the psychometric properties of the four value sets versus visual analogue scale (VAS) was assessed. Intraclass correlation coefficients and Bland-Altman plots were used to test the agreement among the utility scores. Spearman ρ correlation coefficients were used to assess convergent validity between utility scores and patients' sociodemographic and clinical characteristics. With respect to known-group validity, the Kruskal-Wallis test was used to examine the differences in utility according to the stages of cancer.

    RESULTS: There was significant difference among utility scores derived from the four value sets, among which the Malaysian value set yielded higher utility than the other three value sets. Utility obtained from the Malaysian value set had more agreements with VAS than the other value sets versus VAS (intraclass correlation coefficients and Bland-Altman plot tests results). As for the validity, the four value sets showed equivalent psychometric properties as those that resulted from convergent and known-group validity tests.

    CONCLUSIONS: In the absence of an Indonesian value set, the Malaysian value set was more preferable to be used compared with the other value sets. Further studies on the development of an Indonesian value set need to be conducted.

  5. Dilokthornsakul P, Chaiyakunapruk N, Jeanpeerapong N, Lee TA
    Value Health Reg Issues, 2014 May;3:222-228.
    PMID: 29702931 DOI: 10.1016/j.vhri.2014.04.013
    OBJECTIVES: To evaluate whether there are differences in propensity score (PS) and treatment effects estimated using conventional and calendar time-specific PS (CTS-PS) approaches.

    METHODS: A retrospective database analysis at a university-affiliated hospital in Thailand was used. Diabetic patients receiving glucose-lowering medications from July 2008 to June 2011 were included. Patients were categorized into those exposed and not exposed to thiazolidinediones (TZDs). PSs were estimated by using conventional PS and CTS-PS. In the CTS-PS, PS was separately estimated for three specific calendar time periods. Patients were matched 1:1 using caliper matching. The outcomes were cardiovascular and all-cause hospitalizations. The TZD and non-TZD groups were compared with Cox proportional hazard models.

    RESULTS: A total of 2165 patients were included. The average conventional PS was 0.198 (95% confidence interval [CI] 0.195-0.202), while the average PS in the CTS-PS approach was 0.212 (0.206-0.218), 0.180 (0.173-0.188), and 0.205 (0.197-0.213) for July 2008 to June 2009, July 2009 to June 2010, and July 2010 to June 2011, respectively. The average difference in PS was 0.012 (P < 0.001), -0.009 (P ≤ 0.002), and 0.000 (P = 0.950) in the three calendar time periods. The adjusted hazard ratios of the conventional PS-matched cohort were 0.97 (95% CI 0.39-2.45) and 0.97 (95% CI 0.78-1.20) for CVD-related and all-cause hospitalizations, while the adjusted hazard ratios of the CTS-PS-matched cohort were 1.11 (95% CI 0.43-2.88) and 1.12 (95% CI 0.91-1.39), respectively.

    CONCLUSION: CTS-PS is different from PS estimated by using the conventional approach. CTS-PS should be considered when a pattern of medication use has changed over the study period.

  6. Mohd-Dom TN, Wan-Puteh SE, Muhd-Nur A, Ayob R, Abdul-Manaf MR, Abdul-Muttalib K, et al.
    Value Health Reg Issues, 2014 May;3:117-123.
    PMID: 29702916 DOI: 10.1016/j.vhri.2014.04.012
    OBJECTIVES: The aim of this study was to evaluate the cost-effectiveness of the national public sector specialist periodontal program in the management of periodontal disease.
    METHODS: This was a multicenter, time motion, prospective, economic evaluation study involving a total of 165 patients with periodontitis recruited from five selected specialist periodontal clinics. Treatment costs were measured in 2012 Malaysian ringgit (MYR) and estimated from the societal perspective using step-down and activity-based costing methods, and substantiated by clinical pathways. A cost-effectiveness analysis was done to compare the specialist periodontal program with a hypothetical scenario in which patients attend biannual dental visits only for regular dental check-up and scaling. The incremental cost-effectiveness ratio was defined as the difference in cost per gain in quality-adjusted life-years (QALYs) and clinical attachment levels (CALs). One-way scenario-based sensitivity analyses were carried out to assess the uncertainty of inputs.
    RESULTS: The average cost for managing patients with periodontitis was MYR 376 per outpatient visit and MYR 2820 per annum. Clinically, a gain of an average of 0.3 mm of CAL was attained at post-treatment (paired t test, P < .001). Patients gained an average of 3.8 QALY post-treatment (paired t test, P < .001). For cost-effectiveness analysis, the specialist periodontal program was more cost-effective than the hypothesized biannual dental visits, with incremental cost-effectiveness ratios of MYR 451 and MYR 5713 per additional QALY and millimeter CAL gained, respectively.
    CONCLUSIONS: It is very cost-effective for the public sector to provide specialist periodontal treatment for patients with periodontitis according to the World Health Organization criteria and when compared with conventional biannual dental treatment.
  7. Maimaiti N, Ahmed Z, Md Isa Z, Ghazi HF, Aljunid S
    Value Health Reg Issues, 2013 09 13;2(2):259-263.
    PMID: 29702874 DOI: 10.1016/j.vhri.2013.07.003
    OBJECTIVE: To measure the clinical burden of invasive pneumococcal disease (IPD) in selected developing countries.

    METHODS: This is an extensive literature review of published articles on IPD in selected developing countries from East Asia, South Asia, Middle East, sub-Saharan Africa, and Latin America. We reviewed all the articles retrieved from the knowledge bases that were published between the years 2000 and 2010.

    RESULTS: After applying the inclusion, exclusion, and quality criteria, the comprehensive review of the literature yielded 10 articles with data for pneumococcal meningitis, septicemia/bacteremia, and pneumonia. These selected articles were from 10 developing countries from five different regions. Out of the 10 selected articles, 8 have a detailed discussion on IPD, one of them has s detailed discussion on bacteremia and meningitis, and another one has discussed pneumococcal bacteremia. Out of these 10 articles, only 5 articles discussed the case-fatality ratio (CFR). In our article review, the incidence of IPD ranged from less than 5/100,000 to 416/100,000 population and the CFR ranged from 12.2% to 80% in the developing countries.

    CONCLUSIONS: The review demonstrated that the clinical burden of IPD was high in the developing countries. The incidence of IPD and CFR varies from region to region and from country to country. The IPD burden was highest in sub-Saharan African countries followed by South Asian countries. The CFR was low in high-income countries than in low-income countries.

  8. Aljunid S, Maimaiti N, Ahmed Z, Muhammad Nur A, Md Isa Z, Azmi S, et al.
    Value Health Reg Issues, 2014 May;3:146-155.
    PMID: 29702920 DOI: 10.1016/j.vhri.2014.04.008
    OBJECTIVE: To assess the cost-effectiveness of introducing pneumococcal polysaccharide and nontypeable Haemophilus influenzae protein D conjugate vaccine (PHiD-CV) in the National Immunization Programme of Malaysia. This study compared introducing PHiD-CV (10 valent vaccine) with current no vaccination, as well as against the alternative 13-valent pneumococcal conjugate vaccine (PCV13).

    METHODS: A lifetime Markov cohort model was adapted using national estimates of disease burden, outcomes of pneumococcal disease, and treatment costs of disease manifestations including pneumonia, acute otitis media, septicemia, and meningitis for a hypothetical birth cohort of 550,000 infants. Clinical information was obtained by review of medical records from four public hospitals in Malaysia from the year 2008 to 2009. Inpatient cost from the four study hospitals was obtained from a diagnostic-related group-based costing system. Outpatient cost was estimated using clinical pathways developed by an expert panel. The perspective assessed was that of the Ministry of Health, Malaysia.

    RESULTS: The estimated disease incidence was 1.2, 3.7, 70, and 6.9 per 100,000 population for meningitis, bacteremia, pneumonia, and acute otitis media, respectively. The Markov model predicted medical costs of Malaysian ringgit (RM) 4.86 billion (US $1.51 billion) in the absence of vaccination. Vaccination with PHiD-CV would be highly cost-effective against no vaccination at RM30,290 (US $7,407) per quality-adjusted life-year gained. On comparing PHiD-CV with PCV13, it was found that PHiD-CV dominates PCV13, with 179 quality-adjusted life-years gained while saving RM35 million (US $10.87 million).

    CONCLUSIONS: It is cost-effective to incorporate pneumococcal vaccination in the National Immunization Programme of Malaysia. Our model suggests that PHiD-CV would be more cost saving than PCV13 from the perspective of the Ministry of Health of Malaysia.

    Study site: UKM Medical Centre, Hospital Kuala Lumpur, Hospital
    Alor Setar, and Hospital Queen Elizabeth, Kota Kinabalu
  9. Taha NA, Ibrahim MI, Rahman AF, Shafie AA, Rahman AH
    Value Health Reg Issues, 2012 May;1(1):82-86.
    PMID: 29702832 DOI: 10.1016/j.vhri.2012.03.006
    OBJECTIVES: To explore the validity and reliability of a disease-specific health-related quality-of-life questionnaire-the Schizophrenia Quality of Life Scale Revision 4 (SQLS-R4)-in patients with schizophrenia in Malaysia.
    METHODS: A total of 222 outpatients with schizophrenia receiving treatment at the Universiti Kebangsaan Malaysia Medical Centre completed the SQLS-R4 in either the Malay or the English language. A generic self-report health-related quality-of-life measure-the EuroQoL group EuroQol five-dimensional questionnaire-and a measure of symptom severity-the Clinical Global Impression-Schizophrenia scale-were also administered to assess validity.
    RESULTS: Good internal consistency reliability was found for both the psychosocial and vitality domains (Cronbach's α = 0.95 and 0.85, respectively). Most items were also significantly correlated with their own scale score (rs ranging from 0.29 to 0.74). There was a moderate correlation between the SQLS-R4 "vitality" domain and the EuroQol five-dimensional questionnaire "usual activities" domain (rs = 0.44) and a large correlation between the SQLS-R4 "psychosocial" domain and the EuroQol five-dimensional questionnaire "anxiety/depression" domain (rs = 0.44-0.57). Most of the symptom dimensions of the Clinical Global Impression-Schizophrenia scale were also moderately correlated with the SQLS-R4 subscale scores.
    CONCLUSIONS: The SQLS-R4 is a valid and reliable health-related quality-of-life instrument for use in minimally ill patients with schizophrenia in Malaysia, but some of the items may be redundant and irrelevant. Validation of SQLS-R4 in different types of patients and various levels of illness severity is required to further verify its application.
    Study site: Psychiatry clinic, Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM), Kuala Lumpur, Malaysia
  10. Nasution A, Syed Sulaiman SA, Shafie AA
    Value Health Reg Issues, 2013 May;2(1):43-47.
    PMID: 29702851 DOI: 10.1016/j.vhri.2013.02.009
    OBJECTIVES: This study evaluated the clinical and economic impacts of clinical pharmacy education (CPE) on infection management among patients with chronic kidney disease (CKD) stages 4 and 5 in Haji Adam Malik Hospital, Indonesia.

    METHODS: A quasi-experimental economic evaluation comparing CPE impact on 6-month CKD mortality was conducted on the basis of payer perspective. The experimental group (n = 63) received care by health care providers who were given CPE on drug-related problems and dose adjustment. The control group (n = 80) was based on the historical cohort of patients who received care before the CPE. Measure of clinical outcome applied in this study was number of lives saved/100 patients treated. Cost-effectiveness ratios for CKD stages 4 and 5 patients without CPE and with CPE and incremental cost-effectiveness ratios (ICERs) for CKD stages 4 and 5 patients were analyzed.

    RESULTS: Lives saved (%) in the treatment of CKD without CPE: CKD stage 4, 78.57; CKD stage 5, 57.58. Lives saved (%) in the treatment of CKD with CPE: CKD stage 4, 88.89; CKD stage 5, 65.45. Cost-effectiveness ratios for stage 4 with and without CPEs were Rp3,348,733.27 and Rp3,519,931.009, respectively. Cost-effectiveness ratios for stage 5 with and without CPEs were Rp7,137,874.93 and Rp7,871,822.27, respectively. ICERs were Rp2,045,341.22 for CKD stage 4 and Rp1,767,585.60 for CKD stage 5.

    CONCLUSIONS: Treatment of CKD stages 4 and 5 with CPE was more effective and cost-effective compared with treatment of CKD stages 4 and 5 without CPE. The ICERs indicated that extra costs were required to increase life saved in both stages.

  11. Shafie AA, Hassali MA, Mohamad Yahaya AH
    Value Health Reg Issues, 2013 May;2(1):107-117.
    PMID: 29702838 DOI: 10.1016/j.vhri.2013.02.005
    OBJECTIVE: To describe the health-related quality of life (HRQOL) among nonprescription medicine customers in Malaysia and the factors that affect it.

    METHODS: A nationwide cross-sectional survey was conducted among pharmacy customers in 59 randomly selected community pharmacies in Malaysia. The self-administered questionnaire included the EuroQoL five-dimensional (EQ-5D) questionnaire, the EuroQol visual analogue scale (EQ-VAS), nonprescription medicines purchase, and demographic questions. Data were analyzed by using the multivariate analysis of variance and multiple logistic regressions.

    RESULTS: A total of 2729 customers enrolled in this study, with a mean EQ-5D questionnaire score of 0.92±0.15 and a mean EQ-VAS score of 69.92±24.80. Compared with the Malaysian adult population, nonprescription medicine customers have a lower mean EQ-5D questionnaire score (t =-4.49, P<0.01) and EQ-VAS score (t =-25.87, P<0.01). We found that pain/discomfort (25.6%) and anxiety/depression (13.7%) were the major HRQOL problems. Locality, age, ethnicity, household income per month, type of occupation, and type of nonprescription medicine purchased were associated with health status of nonprescription medicine customers (F22,5286 = 2.555; Wilks' lambda = 0.979; P< 0.01).

    CONCLUSIONS: The HRQOL of nonprescription medicine customers is lower than that of the general Malaysian population. Lower health status was independently associated with older age, living in rural areas, having low income and education level, and purchasing blood and blood-forming medicines from community pharmacy.

  12. Blebil AQ, S Sulaiman SA, A Hassali M, Dujaili JA, Zin AM
    Value Health Reg Issues, 2014 May;3:19-23.
    PMID: 29702926 DOI: 10.1016/j.vhri.2013.09.001
    OBJECTIVES: Assessment of nicotine withdrawal symptoms is an essential part of tobacco dependence treatment. This study aimed to evaluate the psychometric properties of a Malay translated version of the Minnesota Nicotine Withdrawal Scale (MNWS).

    METHODS: The original scale was translated into Malay following the standard guidelines proposed for translation studies. The reliability and validity of the Malay version scale were evaluated on the basis of data collected from 133 participants. The Cronbach's alpha coefficient was calculated to assess the reliability. To validate the psychometric properties of the scale, factor analysis and construct validity were used. This study was conducted at the Quit Smoking Clinic at Penang General Hospital, Penang, Malaysia.

    RESULTS: The translated scale has excellent reliability, with total Cronbach's alpha of 0.91. The test-retest reliability for the scale presented an excellent reliability and stability of the translated scale with Spearman's rank correlation coefficient (r = 0.876; P < 0.001). There was a significant positive correlation between the exhaled carbon monoxide level, Fagerstrom Test for Nicotine Dependence total score, and number of cigarettes smoked per day and the MNWS total score (r = 0.72, 0.68, and 0.68, respectively; P < 0.001). A principal-components analysis with orthogonal rotation yielded a unidimensional model that includes all the items of the MNWS.

    CONCLUSIONS: The Malay version of the MNWS is a reliable and valid measure of withdrawal symptoms as well as the smoking urge, and it is applicable to clinical practice and research study.

    Study site: Quit Smoking Clinic at Penang General Hospital, Penang, Malaysia.
  13. Lee KKC, Chia Wu DB, Topachevskyi O, Delgleize E, DeAntonio R
    Value Health Reg Issues, 2013 May;2(1):64-74.
    PMID: 29702855 DOI: 10.1016/j.vhri.2013.01.012
    BACKGROUND: Pneumococcal universal vaccination in Hong Kong was introduced in 2009.

    OBJECTIVES: We assessed the health and economic impact of the 10-valent pneumococcal nontypeable Haemophilus influenzae protein D conjugate vaccine (PCV-10) compared with the current 13-valent pneumococcal conjugate vaccine (PCV-13) recommended for Hong Kong in 2011, providing new elements to be considered by public health authorities in the future decision-making process for pneumococcal vaccines in this country.

    METHODS: An analytical model was used to estimate the annual economic and health outcomes of invasive pneumococcal disease (IPD), community-acquired pneumonia, and acute otitis media (AOM), including nontypeable H. influenzae-related AOM, for a birth cohort in Hong Kong from the payer perspective with a 10-year horizon. Clinical impact including morbidity-mortality, quality-adjusted life-years (QALYs), incremental costs, and cost-effectiveness comparing PCV-10 and PCV-13 were estimated. Probabilistic sensitivity analyses by using alternate scenarios were performed.

    RESULTS: Model projections indicate that PCV-13 and PCV-10 have approximately equivalent impact on the prevention of deaths caused by IPD and pneumonia. PCV-13 is projected to prevent 6 additional cases of IPD, whereas PCV-10 is projected to prevent 13,229 additional AOM cases and 101 additional QALYs. For the base case, PCV-10 vaccination is estimated to save 44.6 million Hong Kong dollars (34.1 million Hong Kong dollars discounted). Sensitivity analysis indicated that PCV-10 would generate more QALYs and save costs as compared with PCV-13.

    CONCLUSIONS: Universal infant vaccination with new available pneumococcal vaccines is expected to generate a significant additional impact on reducing the burden of pneumococcal diseases in Hong Kong. PCV-10 vaccination would be potentially a cost-saving strategy compared with PCV-13 vaccination, generating better cost offsets and higher QALY gains.

  14. Azmi S, Goh A, Fong A, Anchah L
    Value Health Reg Issues, 2015 May;6:80-83.
    PMID: 29698198 DOI: 10.1016/j.vhri.2015.03.015
    OBJECTIVES: This study's objectives were to estimate the quality of life (QOL) of Malaysian patients with acute coronary syndrome (ACS) during admission and at 12 months, to explore the factors associated with the QOL, and to compare utility scores derived from tariffs from local and foreign populations.

    METHODS: Data collected from patients with ACS between 2008 and 2009 for a study on cardiac rehabilitation at the Sarawak General Hospital were used for this study. QOL data were obtained using a validated version of the EuroQol five-dimensional questionnaire at baseline and at 12 months. Health utility scores were calculated using visual analogue scale scores and utility tariffs from Malaysia and the United Kingdom.

    RESULTS: Data from 104 subjects from the earlier study was used. The mean age was 56.1 years, with 88.5% being men. The mean hospitalization duration was 6.3 days. The mean utility score was 0.75 at baseline and 0.82 at 12 months. There was a statistically significant improvement in utility from baseline to 12 months based on the Malaysian tariff (P = 0.014) but not with the UK tariff (P = 0.086). The QOL of patients was associated with sex and diagnosis of ST-segment elevation myocardial infarction.

    CONCLUSIONS: Our results showed that there was a significant improvement in the QOL from baseline to 12 months. Only sex and diagnosis affected the QOL score at baseline because of limited variables available for testing. It also reconfirms the importance of applying the appropriate, country-specific utility tariffs in QOL studies. Despite limitations, the study is useful toward describing QOL among a group of Malaysian patients with ACS.

  15. Abdulelah J, Sulaiman SAS, Hassali MA, Blebil AQ, Awaisu A, Bredle JM
    Value Health Reg Issues, 2015 May;6:53-59.
    PMID: 29698193 DOI: 10.1016/j.vhri.2015.03.006
    BACKGROUND: Various generic instruments exist to assess health-related quality of life (HRQOL) in patients with tuberculosis (TB), but a psychometrically sound disease-specific instrument is lacking.

    OBJECTIVES: The present study aimed to develop and psychometrically validate a multidimensional TB-specific HRQOL instrument relevant to the value of patients with pulmonary TB in Iraq with an eye toward cross-cultural application.

    METHODS: The core general HRQOL questionnaire is composed of the Functional Assessment of Cancer Therapy-General items. A modular approach was followed for the development of the Functional Assessment of Chronic Illness Therapy-Tuberculosis (FACIT-TB) questionnaire in which a set of items assessing quality-of-life (QOL) issues not sufficiently covered by the core Functional Assessment of Cancer Therapy-General items, but considered to be relevant to the target population, was added. Moreover, principal-component analysis was used to determine the new subscale structure of the questionnaire.

    RESULTS: In addition to the 27 items of the core questionnaire, a set of 20 items referring to disease symptoms related to the site of infection, adverse effects, and additional QOL dimensions such as fatigue, social stigma, and economic burden of the illness was included. Factor analysis demonstrated that the FACIT-TB construct comprised five domains.

    CONCLUSIONS: A rigorous method was applied in the development of the FACIT-TB measure to fully understand the impact of TB on patients' QOL. The instrument is psychometrically sound and portrays multiple important dimensions of HRQOL. FACIT-TB is relatively brief, is easy to administer and score, and is appropriate for use in clinical trials and practice.
  16. Tan CS, Hassali MA, Neoh CF, Saleem F, Horne R
    Value Health Reg Issues, 2018 May;15:161-168.
    PMID: 29730249 DOI: 10.1016/j.vhri.2017.12.010
    BACKGROUND: Low rate of adherence was found strongly associated with patients' beliefs across the studies about chronic diseases with hypertension. A crucial move is needed to bridge the gap between appropriate assessment tools and local hypertensive patients' medication adherence.

    OBJECTIVE: To produce a translated version in Malay language of Beliefs about Medicines Questionnaire (BMQ) that was "conceptually equivalent" to the original English version for use in local clinical practice and research.

    METHODS: The forward translation process was conducted by two independent professional translators and back translation was done by two other independent translators. A reliability analysis was conducted on 238 conveniently selected hypertensive patients. Intraclass correlation coefficient (ICC) was used to assess test-retest reliability for the randomly selected 40 patients in a period of 2 weeks. Discriminant validity was tested through Necessity-Concerns differential, BMQ subscales, and other parameters.

    RESULTS: The overall Cronbach alpha for the internal consistency was good (0.860). The subscales of the BMQ demonstrated adequate internal consistency, with Cronbach alpha value of 0.759 for Specific-Necessity, 0.762 for Specific Concern, 0.624 for General-Overuse, and 0.756 for General-Harm. The ICC was excellent (0.922). Discriminant validity revealed that BMQ Specific-Necessity score was significantly inversely correlated with the systolic blood pressure level. Systolic and diastolic blood pressure levels (P = 0.038; P = 0.05) were reported to be significantly correlated with the Necessity-Concerns differential, with Necessity score equal or exceeding Concerns score.

    CONCLUSIONS: The Malay-translated version of BMQ is a reliable and valid tool to assess patient belief about medication, especially medication adherence among the hypertensive patients in Malaysia.
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