Displaying publications 1 - 20 of 317 in total

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  1. Ahmad Fuad Abdul Rahim, Mohd Jamil Yaacob, Muhamad Saiful Bahri Yusoff
    ASEAN Journal of Psychiatry, 2010;11(1):13-24.
    MyJurnal
    Objective: To determine the construct validity and the internal consistency of the Medical Student Stressor Questionnaire (MSSQ) among medical students hence in the future it could be used as a valid and reliable instrument to identify stressors among medical students. Methods: The blueprint for the development of MSSQ was developed after a review of literature on the subject and a discussion with experts in the field. It comprised of 40 items
    with six hypothetical groups. The face validity of the questionnaire was established through discussion with 141 final year medical students whereas content validity was established through discussion with experts from field of Medical Education and Psychiatry. It was administered to a total of 761 medical students. Data was analysed using Statistical Package Social Sciences (SPSS) version 12. Factor analysis was applied to test construct validity of the MSSQ. Reliability analysis (Cronbach’s alpha and item total correlation) was applied to test internal consistency of the MSSQ. Results: The total Cronbach’s alpha value of the MSSQ was 0.95. All the preliminary 40 items were included in the MSSQ as the items had item total correlation value of more than 0.3. The items were loaded nicely into the six pre-determined hypothetical groups as their factor loading values were more than 0.3.
    Conclusion: This study showed that MSSQ had good psychometric value. It is a valid and reliable instrument in identifying stressors among medical students.
    Matched MeSH terms: Factor Analysis, Statistical
  2. Ramli Musa, Mohd Ariff Fadzil, Zaini Zain
    ASEAN Journal of Psychiatry, 2007;8(2):82-89.
    MyJurnal
    Background: Up to date, there are handful questionnaires that have been validated in Bahasa Malaysia (BM). This study aimed to translate the Depression Anxiety Stress Scales 21-item (DASS-21) and measure its psychometric properties. Objectives: To determine the construct validity and acceptability of the DASS, BM. Methods: Two forward and backward translations were done in BM in accordance to guideline, and its validation was determined by using confirmatory factor analysis. A total of 263 subjects were selected by systematic random sampling to represent Malaysian population for reliability and validity purposes. Results: The BM DASS-21 had very good Cronbach’s alpha values of .84, .74 and .79, respectively, for depression, anxiety and stress. In addition, it had good factor loading values for most items (.39 to .73). Correlations among scales were between .54 and .68. Conclusions: BM DASS-21 is correctly and adequately translated to Bahasa Malaysia with high psychometric properties. Further studies are required to support these findings.
    Matched MeSH terms: Factor Analysis, Statistical
  3. Hasanah Che Ismail, Shamshunnisah Abu Bakar
    ASEAN Journal of Psychiatry, 2009;10(2):100-114.
    MyJurnal
    Objective: Self-esteem is an important component of psychological health. In Malaysia, Rosenberg’s self-esteem scale remained the single most popular utilized scale for studying global self-esteem. This study aims to design a language, culture and illness specific self-esteem questionnaire. Methods: The study consisted of 2 phases. The first phase was to generate items for the new self-esteem questionnaire (SSES) in Bahasa Malaysia. Literature review on the concept of selfesteem and its’ content was conducted. This was followed by expert opinion from professional care-givers. The items were qualitatively validated by healthy subjects and patients with schizophrenia from the same locality, culture and language. The second phase consists of quantitative validation of the items. Items in the new scale were analyzed based on the responses from 165 stable schizophrenia outpatients. The validated Malay version of Rosenberg Self-Esteem scale (RSES) was used concurrently as a comparison. Results: The SSES displayed good internal consistency for its two domains
    (Cronbach’s alpha=0.88, 0.81) and test-retest reliability (ICC), ranged from 0.44 to 0.87. Its construct validity was confirmed by confirmatory factor analysis. The concurrent validity of SSES and RSES using Pearson correlation was 0.77. The Cronbach’s alpha for the validated Malay version of RSES is 0.67. Conclusion: This study presents a new self-esteem questionnaire (SSES) which has high concurrent validity with the standard RSES and confirms the reliability and validity of SSES in Malay patients with Schizophrenia.

    Study site: Psychiatric clinic, Hospital Universiti Sains Malaysia (HUSM), Kelantan and Hospital Kota Bharu, (HKB), Kelantan
    Matched MeSH terms: Factor Analysis, Statistical
  4. Zahiruddin Othman, Muhammad Najib Muhammad Alwi, Kamarul Imran Musa, Muhammad Najib Muhammad Alwi, Ruzita Jamaluddin
    ASEAN Journal of Psychiatry, 2009;10(1):54-74.
    MyJurnal
    Objective: Many studies have emphasized the significance of verbal memory for the functional outcome in schizophrenia. A preserved capability to encode and recall verbal information is essential for the long-term efficacy of psychoeducational programs and other
    psychological intervention to ensure the successful transfer of newly acquired skills or knowledge into everyday life. Aims of this study aimed to validate the MVALT among schizophrenia patients in HUSM. Methods: The subjects were 15 schizophrenia patients
    conveniently selected from the patients that attended follow up at the psychiatry clinic in HUSM or inpatients who have been admitted during the study period and 15 healthy control subjects as a comparison. Reliability and validity of the MVAVLT were analyzed. Results: The validation study showed that the Malay version Auditory Verbal Learning Test (MVAVLT) had a good validity (factor analysis 0.66 to 0.98) and test-retest reliability (pearson correlation ranged from 0.24 to 0.84) and has been shown to be sensitive in
    discriminating between normal and schizophrenia patients. In line with the previous research, the schizophrenia patients performed significantly worse than healthy control in all indexes measured in MVAVLT. Conclusion: The screening of deficits in verbal learning
    and memory among the schizophrenia patients is important, for early detection and treatment since it can be helpful for clinicians and psychologists in their counseling sessions. Subsequently, it helps patients to reduce such cognitive difficulties and their impact by using specific rehabilitation with the usage of newer antipsychotic agents.
    Matched MeSH terms: Factor Analysis, Statistical
  5. Nurul Hazrina Mazlan, Affizal Ahmad
    ASEAN Journal of Psychiatry, 2012;13(2):146-156.
    MyJurnal
    Objectives: The aim of this study is to validate the Malay version of the Aggression Questionnaire (AQ) for the purpose of the future study related to aggression. Furthermore, the study seeks to identify types of aggression hold by the female inmates.

    Methods: A cross-sectional study was designed involving 90 Malaysian female prisoners. The analyses include descriptive analysis, confirmatory factor analysis, and reliability testing. After one-week interval, a test-retest was conducted.

    Results: The preliminary analysis confirmed that factor analysis was appropriate for the Malay-translated version of the AQ. The four factors structure was assessed but the factor loadings are remarkable different from the original versions. The total Cronbach's alpha coefficients is very high (α= 0.91). The Pearson's correlation however is low (r = 0.48) but acceptable for the instrument. Reliability of the subscales and the factors were also found satisfactory. Consequently, anger and hostility were identified as the most common types of aggression among the participants, followed by verbal aggression. In contrast, physical aggression was the least scored type of aggression.

    Conclusion: The Malay-translated version of the AQ was found to be valid and reliable to be used in future studies.
    Matched MeSH terms: Factor Analysis, Statistical
  6. Kaur, Satpal, Nor Zuraida Zainal, Wah, Yun Low, Ramasamy, Ravindran, Sidhu, Jaideep Singh
    ASEAN Journal of Psychiatry, 2014;15(2):186-195.
    MyJurnal
    Objective: Type D personality, tendency trait to experience increased NA (Negative Affect) and SI (Social Inhibition) has been associated with negative psychological conditions linked to heart disease. This study aimed to examine the psychometric properties of the Malay version of Type D personality scale (DS14) among Malaysian patients with coronary artery disease (CAD). Methods: In this cross-sectional study 195 patients diagnosed with CAD were selected from National Heart Institute, Kuala Lumpur. They completed the questionnaire including demographic information and the Malay version of DS14 and Hospital Anxiety and Depression Scale (HADS). Results: The structural validity, as demonstrated by exploratory factor analysis of the DS14 was acceptable. The Cronbach's α coefficient for the NA and SI subscales were 0.876 and 0.732, respectively. With the standardized cut-off of NA ≥ 10 and SI ≥ 10, 28.2% of the patients with CAD were defined as having a Type D personality. Anxiety was significantly higher among patients with Type D personality. Conclusion: The results indicate that the Type D personality (DS14) questionnaire is a valid and reliable tool in the Malaysian population. The prevalence of Type D personality in Malaysia falls close to what has been found in Western countries, at least for CAD patients. This study indicates also that it is possible to use the DS14 among the Malaysian population in future cross-cultural studies. ASEAN Journal of Psychiatry, Vol. 15 (2): July - December 2014: 186-195.
    Matched MeSH terms: Factor Analysis, Statistical
  7. Nurul Hazrina Mazlan, Affizal Ahmad
    ASEAN Journal of Psychiatry, 2014;15(1):54-65.
    MyJurnal
    Objective: This study aims to establish the validity and reliability of the Malay- translated version of the CES-D. Methods: This study employed a cross-sectional study design. The participants were female inmates (n=90) from local prisons which were selected based on purposive-selective sampling. The analyses include face validation, factor analysis, and reliability testing. A test-retest was conducted within a one-week interval. Results: The mean score for depression among the participants is 18.97 (SD=6.51). Further descriptive analysis showed that 58.9% of them scored above the mean score, which is considered high. Preliminary construct validation analysis confirmed that factor analysis was appropriate for the Malay-translated version of the CES-D. Furthermore, the factor analysis showed similar factor loadings to the original English version. The total internal consistency of the translated version, which was measured by Cronbach’s alpha coefficient, was equal to 0.75. The test-retest reliability of the total score, measured by Pearson’s correlation was equal to 0.69. Conclusions: Face validity, construct validity, and reliability analysis were found satisfactory for the Malay-translated version of the CES-D. The Malay-translated version of the CES-D was found valid and reliable to be used in future studies, with comparable properties to the original version and to previous studies. ASEAN Journal of Psychiatry, Vol. 15 (1): January - June 2014: 54-65.
    Matched MeSH terms: Factor Analysis, Statistical
  8. Sullman MJ, Stephens AN, Yong M
    Accid Anal Prev, 2014 Oct;71:1-9.
    PMID: 24863369 DOI: 10.1016/j.aap.2014.04.019
    The present study examined the types of situations that cause Malaysian drivers to become angry. The 33-item version of the driver anger scale (Deffenbacher et al., 1994) was used to investigate driver anger amongst a sample of 339 drivers. Confirmatory factor analysis showed that the fit of the original six-factor model (discourtesy, traffic obstructions, hostile gestures, slow driving, illegal driving and police presence), after removing one item and allowing three error pairs to covary, was satisfactory. Female drivers reported more anger, than males, caused by traffic obstruction and hostile gestures. Age was also negatively related to five (discourtesy, traffic obstructions, hostile gestures, slow driving and police presence) of the six factors and also to the total DAS score. Furthermore, although they were not directly related to crash involvement, several of the six forms of driving anger were significantly related to the crash-related conditions of: near misses, loss of concentration, having lost control of a vehicle and being ticketed. Overall the pattern of findings made in the present research were broadly similar to those from Western countries, indicating that the DAS is a valid measure of driving anger even among non-European based cultures.
    Matched MeSH terms: Factor Analysis, Statistical
  9. Khoo S, Engelhorn R
    Adapt Phys Activ Q, 2011 Jan;28(1):27-39.
    PMID: 21282846
    Understanding the motivations for people to volunteer with the management and execution of major sporting events is important for the recruitment and retention of the volunteers. This research investigated volunteer motivations at the first National Special Olympics held in Ames, Iowa, USA in July 2006. A total of 289 participants completed the 28 item Special Event Volunteer Motivation Scale. The top motivations related to the purposive incentives of wanting to help make the event a success and to do something good for the community. Factor analysis revealed a five-factor model, with the altruistic factor (purposive) being the most important. A MANCOVA was also used to compare subjects using both gender and experience as independent variables. Small but significant differences in motivation were observed.
    Matched MeSH terms: Factor Analysis, Statistical
  10. Jaafar MH, Villiers-Tuthill A, Sim SH, Lim MA, Morgan K
    Aging Ment Health, 2020 04;24(4):620-626.
    PMID: 30596467 DOI: 10.1080/13607863.2018.1550631
    Objectives: The Brief Ageing Perceptions Questionnaire (B-APQ) has five domains that explore views about own ageing. The aim of this study was to validate the B-APQ for use among older adults in Malaysia and to explore socio-demographic variations in ageing self-perceptions.Method: Older adults aged 50 years and above were randomly selected to complete a set of questionnaires. Cronbach's α was used to measure internal consistency, while corrected item-total correlations and correlation with DASS-21 and the CASP-19 scores were employed to assess convergent and discriminant validity. Confirmatory Factor Analysis (CFA) was conducted to confirm the factorial structure of the B-APQ. Difference in self-perceptions of ageing across socio-demographic variables was assessed.Results: Internal consistency for each of the domains was good. Item-total correlations within each domain were strong (>0.6) or very strong (>0.8). Convergent and discriminant validity were supported by significant correlations with DASS-21 depression and CASP-19 scores. CFA results indicated good model fit with the original B-APQ model. Presence of chronic illness also has a significant impact on B-APQ domain scores.Conclusion: The B-APQ is a valid and reliable instrument which can be used to assess self-perceptions of ageing among older Malaysian adults.
    Matched MeSH terms: Factor Analysis, Statistical
  11. Zeldin S, Krauss SE, Collura J, Lucchesi M, Sulaiman AH
    Am J Community Psychol, 2014 Dec;54(3-4):337-47.
    PMID: 25216734 DOI: 10.1007/s10464-014-9676-9
    Youth participation in program and community decision making is framed by scholars as an issue of social justice, a platform for positive youth development and effective citizenry, and a strategy for nation building. Recent literature reviews have consistently identified youth-adult partnership (Y-AP) as an effective type of youth participation across highly diverse contexts. These same reviews, however, note that indicators of Y-AP have not been conceptualized and validated for measurement purposes. The present study addresses this limitation by developing a brief measure of Y-AP that is explicitly grounded in current theory, research, and community practice. The measure was administered to youth in the United States, Malaysia, and Portugal (N = 610). Validation was assessed through factor analysis and tests of factorial, discriminant, and concurrent validity. Results confirmed the two predicted dimensions of the Y-AP measure: youth voice in decision making and supportive adult relationships. These two dimensions were also found to be distinct from other measures of program quality: safety and engagement. As predicted, they also significantly correlated with measures of agency and empowerment. It is concluded that the measure has the potential to support community efforts to maximize the quality of youth programs.
    Matched MeSH terms: Factor Analysis, Statistical
  12. Yusof, Z.Y.M., Jaafar, N.
    Ann Dent, 2013;20(1):13-19.
    MyJurnal
    Long term evaluations of impacts of community
    based health promotion programmes are not an easy or
    straightforward task to do due to lack of validated and
    reliable indices. Objective: To develop and test an index
    to measure schoolchildren’s oral health knowledge,
    attitudes, and behaviour as a result of a school-based health
    promotion programme in Malaysia called the Doktor
    Muda (Junior Doctor) Programme (DMP). Materials and
    Methods: The index was developed in English based on
    the DMP module and translated into Malay. The Malay
    version was tested on 174, 11-12 year old schoolchildren.
    Psychometric analysis of the index involved content and
    face validity tests as well as factor analysis, internal and
    test-retest reliability. Results: Factor analysis yielded 3
    factors with groups of items viz. oral health knowledge
    (OHK), oral health attitudes (OHA) and oral health
    behaviour (OHB). The Cronbach’s alpha coefficients of the
    three factors were 0.61, 0.73, and 0.64, respectively. The
    Kappa coefficients were 0.70, 0.77 and 0.73, respectively
    (intraclass correlation coefficients = 0.72, 0.70 and 0.78).
    The final questionnaire comprised 33 items, namely; OHK
    11 items, OHA 15 items, and OHB 7 items. Conclusion:
    The Health Promotion Questionnaire Index (HPQI) to
    measure the DMP impact on schoolchildren’s oral health
    knowledge, attitudes, and behaviours was empirically
    verified to be valid and reliable for use among 11-12 year
    old Malaysian schoolchildren.
    Matched MeSH terms: Factor Analysis, Statistical
  13. Al-Dubai S, Ganasegeran K, Barua A, Rizal A, Rampal K
    Ann Med Health Sci Res, 2014 Jul;4(Suppl 2):S104-7.
    PMID: 25184074 DOI: 10.4103/2141-9248.138023
    BACKGROUND: The 10-item version of Perceived Stress Scale (PSS-10) is a widely used tool to measure stress. The Malay version of the PSS-10 has been validated among Malaysian Medical Students. However, studies have not been conducted to assess its validity in occupational settings.
    AIM: The aim of this study is to assess the psychometric properties of the Malay version of the PSS-10 in two occupational setting in Malaysia.
    SUBJECTS AND METHODS: This study was conducted among 191 medical residents and 513 railway workers. An exploratory factor analysis was performed using the principal component method with varimax rotation. Correlation analyses, Kaiser-Meyer-Olkin, Bartlett's test of Sphericity and Cronbach's alpha were obtained. Statistical analysis was carried out using statistical package for the social sciences version 16 (SPSS, Chicago, IL, USA) software.
    RESULTS: Analysis yielded two factor structure of the Malay version of PSS-10 in both occupational groups. The two factors accounted for 59.2% and 64.8% of the variance in the medical residents and the railway workers respectively. Factor loadings were greater than 0.59 in both occupational groups. Cronbach's alpha co-efficient was 0.70 for medical residents and 0.71 for railway workers.
    CONCLUSION: The Malay version of PSS-10 had adequate psychometric properties and can be used to measure stress among occupational settings in Malaysia.
    KEYWORDS: Factor structure; Malaysia; Occupational; Perceived stress scale; Psychometric properties; Validity
    Matched MeSH terms: Factor Analysis, Statistical
  14. Goh CR, Lee KS, Tan TC, Wang TL, Tan CH, Wong J, et al.
    Ann Acad Med Singap, 1996 May;25(3):323-34.
    PMID: 8876896
    Quality-of-life assessment has become an accepted method of evaluation in clinical medicine. The technique is based on a patient's self-assessment of physical, psychological, and social function, as well as the effects of distressing physical symptoms. The most important aspect of quality-of-life assessment is that it brings into focus a patient-centred view of health outcome, which is broader than the physiologic measures which predominate in Western medicine. Strategies for the development and use of assessment questionnaires have evolved over the past 15 years, and numerous questionnaires have been created. Most originate in Western societies, with English as the most common language of development. Adapting such questionnaires for use in other language and cultural settings is an imprecise practice. Language translation and equivalent cultural meaning must both be addressed. This paper reports on the language translation process and results for the Functional Living Index for Cancer (FLIC) as translated into Chinese and Malay in Singapore. We employed a step-wise process beginning with translation/back translation, followed by structured pilot field trials and population sampling. Taped versions of the questionnaire were devised to meet illiteracy problems in the sample population. Paired comparisons of the Chinese and Malay versions of individual questions with their English counterparts show good correlations and similar means most of the time. Factor analysis on a population sample of 246 (112 Chinese, 35 Malay and 98 English speaking) with cancers of minimal, extensive or palliative extent is convergent with that obtained on a North American population. However, a separate analysis of the Chinese questionnaires showed some differences in factor pattern. Specific language and cultural translation difficulties are discussed. Of note is the predicted significant decrease in total FLIC scores with extent of disease within each of the language preference populations, which provides some evidence for the validity for each language version in the Singapore culture(s). Thus, the FLIC translations into Malay and Chinese in Singapore can be considered for use in local trials, subject to ongoing evaluation.
    Matched MeSH terms: Factor Analysis, Statistical
  15. Loke SC, Jong M
    Ann Acad Med Singap, 2008 Jan;37(1):15-20.
    PMID: 18265892
    INTRODUCTION: Patient adherence to treatment is viewed as essential to good metabolic control in diabetes. Our primary objective was to determine if self-reported patient adherence correlated strongly with metabolic control. Our secondary objective was to determine the natural grouping of factors which influence adherence.

    MATERIALS AND METHODS: Data were collected using a questionnaire set with 5-point Likert scales. Primary analysis was done using Spearman's correlation coefficient between self-reported composite adherence scores and HbA1c. Secondary analysis was done using exploratory factor analysis.

    RESULTS: The primary analysis suggests that patient adherence to the treatment regime is weakly correlated to metabolic control. Calculated Spearman's rho was 0.197, with a two-tailed P value of 0.027. The secondary analysis demonstrates the natural clustering of factors that influence patient adherence to treatment. A 6-factor solution was found to account for most of the variance in the data. We also found that feelings of frustration, anxiety, and depression were associated with a lack of knowledge about diabetes treatment. In addition, belief in traditional medicine correlated strongly with ethnicity.

    CONCLUSION: A good treatment regime for type 2 diabetes mellitus influences metabolic outcome far more than patient adherence.
    Matched MeSH terms: Factor Analysis, Statistical
  16. Swami V, Maïano C, Todd J, Ghisi M, Cardi V, Bottesi G, et al.
    Appetite, 2021 11 01;166:105588.
    PMID: 34224761 DOI: 10.1016/j.appet.2021.105588
    The construct of intuitive eating is most often measured using the 23-item Intuitive Eating Scale-2 (IES-2), but previous studies have typically relied solely on confirmatory factor analysis (CFA) to understand IES-2 dimensionality. In contrast, a bifactor exploratory structural equation modelling (B-ESEM) framework offers a more realistic account of IES-2 multidimensionality. Here, we assessed the psychometric properties of a novel Italian translation using a combination of exploratory factor analysis and B-ESEM. A total of 950 adults completed the IES-2 alongside measures of positive body image, disordered eating, and psychological well-being. Results indicated that a 4-factor B-ESEM model had adequate fit to the data and that fit was improved when the correlated uniqueness of seven negatively worded IES-2 items was accounted for. This model of IES-2 scores showed adequate internal consistency and good test-retest reliability up to three weeks. Evidence of construct validity was good in terms of a global IES-2 factor, and broadly supported in terms of its specific-factors. These results highlight the utility of a B-ESEM framework for understanding the dimensionality of IES-2 scores and may help scholars better understand the extent to which the IES-2 adequately operationalises the construct of intuitive eating.
    Matched MeSH terms: Factor Analysis, Statistical
  17. Rafiqul IS, Sakinah AM, Zularisam AW
    Appl Biochem Biotechnol, 2015 Jun;176(4):1071-83.
    PMID: 25904039 DOI: 10.1007/s12010-015-1630-2
    Xylose-rich sawdust hydrolysate can be an economic substrate for the enzymatic production of xylitol, a specialty product. It is important to identify the process factors influencing xylitol production. This research aimed to screen the parameters significantly affecting bioxylitol synthesis from wood sawdust by xylose reductase (XR). Enzymatic bioxylitol production was conducted to estimate the effect of different variables reaction time (2-18 h), temperature (20-70 °C), pH (4.0-9.0), NADPH (1.17-5.32 g/L), and enzyme concentration (2-6 %) on the yield of xylitol. Fractional factorial design was followed to identify the key process factors. The screening design identified that time, temperature, and pH are the most significant factors influencing bioxylitol production among the variables with the values of 12 h, 35 °C, and 7.0, respectively. These conditions led to a xylitol yield of 71 % (w/w). This is the first report on the statistical screening of process variables influencing enzyme-based bioxylitol production from lignocellulosic biomass.
    Matched MeSH terms: Factor Analysis, Statistical
  18. Zarei S, Memari AH, Moshayedi P, Mosayebi F, Mansournia MA, Khoo S, et al.
    Arch Iran Med, 2016 Oct;19(10):704-711.
    PMID: 27743435
    BACKGROUND: Given the importance of regular physical activity, it is crucial to evaluate the factors favoring participation in physical activity. We aimed to report the psychometric analysis of the Farsi version of the Physical Activity and Leisure Motivation Scale (PALMS).

    METHODS: The Farsi version of PALMS was completed by 406 healthy adult individuals to test its factor structure and concurrent validity and reliability.

    RESULTS: Conducting the exploratory factor analysis revealed nine factors that accounted for 64.6% of the variances. The PALMS reliability was supported with a high internal consistency of 0.91 and a high test-retest reliability of 0.97 (95% CI: 0.97-0.98). The association between the PALMS and its previous version Recreational Exercise Motivation Measure scores was strongly significant (r= 0.86, P < 0.001).

    CONCLUSION: We have shown that the Farsi version of the PALMS appears to be a valuable instrument to measure motivation for physical activity and leisure.

    Matched MeSH terms: Factor Analysis, Statistical
  19. Azami G, Lam SK, Shariff-Ghazali S, Said SM, Aazami S, Mozafari M, et al.
    Arch Iran Med, 2018 08 01;21(8):356-361.
    PMID: 30113857
    BACKGROUND: The theory if self-efficacy is the central concept of social cognitive theory with emphasis on the constructs of efficacy expectation, outcome expectation. Efficacy expectation is defined as the person's confidence to carry out a specific behavior. Outcome expectation is beliefs that carrying out a specific behavior will lead to a specific outcome. While the benefit of measuring outcome expectations has been established, there has been no large scale within the Iranian context. The purpose of this study is to examine the reliability-validity of the Persian version of the Perceived Therapeutic Efficacy Scale (PTES).

    METHODS: This study was conducted among 160 patients with type 2 diabetes mellitus (T2DM) using a self-administered instrument measuring outcome expectation. We used a methodological study design to assess the validity and reliability of the translated Persian version of the instrument.

    RESULTS: The findings of the present study support the uni-dimensionality of the Persian version of the instrument. The 10 items of the scale account for 73.54% of the total variance and the un-rotated factor loadings ranged from 0.66 to 0.93. Moreover, this study offers support for convergent validity and internal consistency of the scale.

    CONCLUSION: Our study demonstrated good convergent validity, factor structure and internal consistency in a sample of 160 Iranian adults with T2DM. Therefore, the Persian version of the scale is a valid and reliable instrument and can be used in research and clinical settings.

    Matched MeSH terms: Factor Analysis, Statistical
  20. Kaur S, Zainal NZ, Low WY, Ramasamy R, Sidhu JS
    Asia Pac J Public Health, 2015 May;27(4):450-60.
    PMID: 24807887 DOI: 10.1177/1010539514533719
    The Hospital Anxiety and Depression Scale (HADS) is a common screening instrument used to determine the levels of anxiety and depression experienced by a patient and has been extensively used in patients with coronary artery disease (CAD). This study aimed to establish the factor structure of HADS in a Malaysian sample of 189 patients with CAD. Factor analysis of HADS using principal component analysis with varimax rotation yielded 3 factors. Confirmatory factor analysis supported the use of HADS in assessing 3 distinct dimensions of psychological distress--namely, anxiety, anhedonia, and psychomotor retardation. The HADS showed good internal consistency and was found to be a valid measure of psychological distress among Malaysian patients with CAD. However, low mean scores on the original 2 factors--that is, anxiety and depression--and also on the 2 depression subscales--anhedonia and psychomotor retardation--suggests that the recommended cutoff score to screen for psychological distress among CAD patients be reevaluated. Further research to determine the generalizability and consistency for the tridimensional structure of the HADS in Malaysia is recommended.
    Matched MeSH terms: Factor Analysis, Statistical
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