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Fulltext A simplified guide to determination of sample size requirements for estimating the value of intraclass correlation coefficient: a review

Mohamad Adam Bujang, Nurakmal Baharum

Archives of Orofacial Sciences, 2017;12(1):1-11.
MyJurnal

Intraclass correlation coefficient (ICC) measures the extent of agreement and consistency among
raters for two or more numerical or quantitative variables. This review paper aimed to present several tables that
could illustrate the minimum sample sizes required for estimating the desired effect size of ICC, which is a
measurement of the magnitude of an agreement. Determination of the minimum sample size under such
circumstances is based on the two fundamentally important parameters, namely the actual value of the ICC and
the number of observations made by each subject. The sample size calculations are derived from Power Analysis
and Sample Size (PASS) software where the alpha and minimum required power is fixed at 0.05 and higher than
0.80 respectively. A discussion on how to use these tables for determining sample sizes required for each of the
various scenarios and the limitations associated with their use in each of these scenarios is provided.
Fulltext Reliability of Bahasa Malaysia version of family environment scale and its measurement issues

Khairani Omar, Noor Azimah Muhammad, Farihna Mohamed Fadhlullah, Ramli Musa, Jamaiyah Hanif, Adam Bujang

ASEAN Journal of Psychiatry, 2010;11(1):44-55.
MyJurnal

Objective: Family Environment Scale (FES) is one of the most widely used instruments to measure many family aspects. Cross cultural adaptation of the original FES is essential prior to local utilization as different cultures percept their family environments differently. We attempted to translate the FES into the Bahasa Malaysia language for adolescents, evaluate its reliability using internal consistency and compare its results with the original
study. Methods: This is a cross-sectional study, involving adolescents aged 12-17 from four secondary schools. The adolescents were selected using quota sampling for different age, ethnic and academic performance. The study was divided into four phases, namely: i) translation of FES, ii) pilot test iii) internal consistency reliability test and iv) comparison of the study results with the original FES. Results: A total of 295 adolescents participated in this study. All of the reliability measurements generated (ranged between Cronbach’s alpha 0.10 - 0.70) were lower than those originally reported for this instrument (ranged between Cronbach’s alpha 0.61 -0.78). Five subscales in the Bahasa Malaysia version were found to be less than Cronbach’s alpha 0.5, which were below the acceptable level for practical or research use. There was considerable variation observed between the sample population of this study and that of the original study, which could be due to the social cultural differences. Conclusion: The Bahasa Malaysia version of FES requires further culturally
appropriate revision. A new measuring scale could also be devised to provide an accurate evaluation of the family environment as perceived by Malaysian adolescents, which has acceptable levels of reliability and validity.
Group-based exercise interventions for community-dwelling older people in Southeast Asia: A systematic review

Bong May Ing J, Singh DKA, Tan MP, Adam Bujang M, Tiong IK, Whitney J, et al.

Australas J Ageing, 2023 Dec;42(4):624-637.
PMID: 37465973 DOI: 10.1111/ajag.13227

OBJECTIVES: Southeast Asia (SEA) is a rapidly ageing and a diversely populated region that requires strategies to maintain its populations' physical activity and sense of well-being. While the benefits of group exercise programs are known, the characteristics and types of exercises in terms of their effectiveness for physical function and fidelity of the programs have yet to be defined within this population.
METHODS: Ovid, MEDLINE, Scopus, PEDro (Physiotherapy Evidence Database), EBSCOHOST, Cochrane library and Open Grey databases were searched to identify relevant studies. Methodological quality was assessed using the PEDro Scale and the Newcastle Ottawa Scale (NOS). Meta-analysis was undertaken when the same outcome measures were reported in a minimum of two studies with appropriate data. (PROSPERO: CRD42020177317).
RESULTS: Eleven studies with 900 participants were included, out of which 395 participants were allocated to group exercise programs and 383 completed the program. Culturally adapted Thai dance programs and multicomponent exercise programs were the most-commonly reported group exercises. The Timed Up and Go test (TUG) and attendance rates were the most-frequently reported outcomes. Meta-analysis demonstrated significant improvement in physical function assessed using the Timed Up and Go test (Random effect model -1.27 s, 95% CI -1.65, -0.88, I2 = 74%). In two studies, adherence (81% and 94%) and dropout rates (4% and 19%) were reported.
CONCLUSIONS: Group-based exercise programs in Southeast Asia consisting mostly of culturally adapted Thai dance programs and multicomponent exercise programs appear to have positive effects on physical function. However, better descriptions of fidelity, including adherence, are required in future studies.
Fulltext Reliability and validity of the revised Summary of Diabetes Self-Care Activities (SDSCA) for Malaysian children and adolescents

Jalaludin MY, Fuziah MZ, Hong JYH, Mohamad Adam B, Jamaiyah H

Malays Fam Physician, 2012;7(2-3):10-20.
PMID: 25606251 MyJurnal

BACKGROUND: Self-care plays an important role in diabetes management. One of the instruments used to evaluate self-care in patients with diabetes is the Summary of Diabetes Self-Care Activities (SDSCA) questionnaire. A validated instrument in the Malay language is used to assess self-care practice among children and adolescents with diabetes in Malaysia.
OBJECTIVE: To translate and evaluate the psychometric properties of the revised version of the SDSCA questionnaire in the Malay language.
METHODS:Forward and backward translations were performed. An expert panel reviewed all versions for conceptual and content equivalence. The final version was administered to paediatric patients with diabetes between August 2006 and September 2007. Reliability was analysed using Cronbach's alpha and validity was assessed using exploratory factor analysis.
RESULTS: A total of 117 patients aged 10-18 years were enrolled from nine hospitals. The reliability of overall core items was 0.735 (with item 4) while the reliabilities of the four domains were in the range of 0.539-0.838. As core item number 4 was found to be problematic and it was subtituted by item 5a (from the expanded SDSCA) to suit local dietary education and practice; and the reliabilities of the overall core item (0.782) and the four domains (0.620 - 0.838) improved. Factor loadings of all the items were greater than 0.4, loaded into the original domains, and accounted for 73% of the total variance.
CONCLUSION: The Malay translation of the revised English SDSCA is reliable and valid as a guide for Malaysian children and adolescents suffering from diabetes.
KEYWORDS: Adolescents Diabetes self-care; Children; Malay-translated version of SDSCA
Study site: Pediatric Clinic, University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia
Fulltext Validation of the Malay version of Berlin questionaire to identify Malaysian patients for obstructive sleep apnea

Yunus A, Seet W, Md Adam B, Jamaiyah H

Malays Fam Physician, 2013;8(1):5-11.
PMID: 25606261 MyJurnal

Objective: To validate the Malay version of Berlin Questionnaire (BQ) as a tool to screen for patients at risk of obstructive sleep apnea (OSA) in primary care Background: Most patients with OSA are unrecognised and untreated. Thus, the BQ has been used as a tool to screen for patients at risk for OSA. However, this tool has not been validated in Malay version. Materials and Methods: A parallel back-to-back translation method was applied to produce the Malay version (Berlin-M). The Malay version was administered to 150 patients in a tertiary respiratory medical centre. Concurrent validity of the Berlin-M was determined using the Apnea Hypopnea Index (AHI) as the gold standard measure. The test-retest reliability and internal consistency of the Berlin-M were determined. Results: Most patients were males (64.0%) and majority of them were Malays (63.3%). Based on the sleep study test, 121 (84.0%) were classified as high risk while 23 (16.0%) as low risk using the Apnea Hypopnea Index (AHI) ≥5 as the cutoff point. The test–retest reliability Kappa value showed a good range between 0.864 – 1.000. The Cronbach’s alpha of BQ was 0.750 in category 1 and 0.888 in category 2. The sensitivity and specificity were 92% and 17% respectively. Conclusion: The BQ showed high sensitivity (92%) but low specificity (17%). Therefore, though the Berlin-M is useful as a screening tool, it is not a confirmatory diagnostic tool.
Fulltext Validation of the Kessler's psychological distress scale (K10 & K6) in a Malaysian population

Tiong, Xun Ting, Nur Sara Shahira Abdullah, Mohamad Adam Bujang, Fatin Ellisya Sapri, Selvasingam Ratnasingam, Chong, Kok Joon, et al.

ASEAN Journal of Psychiatry, 2018;19(1):0-0.
MyJurnal

Objective: A quick assessment tool for screening individuals with depression or anxiety is pertinent in mental-health set up. This study aims to validate the K10 and the K6 to screen patients with non-specific
psychological distress in a Malaysian population.

Methods: Translation of the questionnaire was done from English to Malay. Face validity was conducted on patients, and a pilot study was performed to assess the reliability of the K10 questionnaire. Fieldwork was conducted to determine the reliability and validity of the K10 questionnaire based on convenience sampling of healthy individuals and patients diagnosed with psychiatric illness. Malay version for K10 was administered to healthy participants (group without psychological distress) and patients on psychiatric clinic follow up (psychological distress). Data collection was done between August 2016 and September 2016.

Result: A total of 94 subjects were recruited in the study, of which 32 formed the case group. The Cronbach’s alpha coefficients for K10
were 0.837(control) and 0.885 (case), as for K6 were 0.716 (control) and 0.859 (case). The total score of the
K10 and the K6 clearly differentiated between the control and case groups (p

Study site: Sarawak General Hospital
Fulltext Reliability and validity of the Malay translated version of diabetes quality of life for youth questionnaire

Jalaludin MY, Fuziah MZ, Hadhrami MH, Hong JYH, Jamaiyah H, Mohamad Adam B

Malays Fam Physician, 2013;8(1):12-9.
PMID: 25606262 MyJurnal

Many studies reported poorer quality of life (QoL) in youth with diabetes compared to healthy peers. One of the tools used is the Diabetes Quality of Life for Youth (DQoLY) questionnaire in English. A validated instrument in Malay is needed to assess the perception of QoL among youth with diabetes in Malaysia.
Fulltext Diabetic ketoacidosis at diagnosis of type 1 diabetes mellitus in Malaysian children and adolescents

Hong JYH, Jalaludin MY, Mohamad Adam B, Fuziah MZ, Wu LL, Rasat R, et al.

Malays Fam Physician, 2015;10(3):11-18.
PMID: 27570603 MyJurnal

Background: Diabetic ketoacidosis (DKA) is a late presentation of newly diagnosed type 1 diabetes mellitus (DM) in children. The aim of this study was to determine the clinical characteristics of type 1 DM at presentation so that appropriate actions can be taken to promote early diagnosis.
Methods: This was a retrospective cohort review from a patient registry database. Data on all patients younger than 20 years old diagnosed with type 1 DM who had been registered with the Malaysian Diabetes in Children and Adolescents Registry (DiCARE) from its inception in 2006 until 2009 were analysed.
Results: The study included 490 children and adolescents, out of which 57.1% were female. The mean (SD) age at diagnosis was 7.5 (3.7) years, which increased from year 2000 to 2009 [6.6 (3.3) years to 9.6 (3.5) years; p = 0.001]. An increasing percentage of DKA at diagnosis was observed from year 2000 (54.5%) to year 2009 (66.7%), which remained high and leveled between 54.5% and 75.0%. DKA was more common in patients with normal weight (p = 0.002) with no significant association with age, gender, ethnicity and status of family history of diabetes mellitus.
Conclusion: An increasing trend of age at diagnosis of patients with type 1 DM was observed. Besides that, proportion of DKA at diagnosis had remained high over the past decade. This study found that normal weight was associated with status of DKA, thus more detailed investigations are required to determine the risk factors for DKA.
Fulltext Poor glycemic control in younger women attending Malaysian public primary care clinics: findings from adults diabetes control and management registry

Cheong AT, Lee PY, Sazlina SG, Mohamad Adam B, Chew BH, Mastura I, et al.

BMC Fam Pract, 2013;14:188.
PMID: 24325794 DOI: 10.1186/1471-2296-14-188

BACKGROUND: Women of reproductive age are a group of particular concern as diabetes may affect their pregnancy outcome as well as long-term morbidity and mortality. This study aimed to compare the clinical profiles and glycemic control of reproductive and non-reproductive age women with type 2 diabetes (T2D) in primary care settings, and to determine the associated factors of poor glycemic control in the reproductive age group women.
METHODS: This was a cross-sectional study using cases reported by public primary care clinics to the Adult Diabetes Control and Management registry from 1st January to 31st December 2009. All Malaysian women aged 18 years old and above and diagnosed with T2D for at least 1 year were included in the analysis. The target for glycemic control (HbA1c < 6.5%) is in accordance to the recommended national guidelines. Both univariate and multivariate approaches of logistic regression were applied to determine whether reproductive age women have an association with poor glycemic control.
RESULTS: Data from a total of 30,427 women were analyzed and 21.8% (6,622) were of reproductive age. There were 12.5% of reproductive age women and 18.0% of non-reproductive age women that achieved glycemic control. Reproductive age group women were associated with poorer glycemic control (OR = 1.5, 95% CI = 1.2-1.8). The risk factors associated with poor glycemic control in the reproductive age women were being of Malay and Indian race, longer duration of diabetes, patients on anti-diabetic agents, and those who had not achieved the target total cholesterol and triglycerides.
CONCLUSION: Women with T2D have poor glycemic control, but being of reproductive age was associated with even poorer control. Health care providers need to pay more attention to this group of patients especially for those with risk factors. More aggressive therapeutic strategies to improve their cardiometabolic control and pregnancy outcome are warranted.
Control of glycemia and other cardiovascular disease risk factors in older adults with type 2 diabetes mellitus: data from the Adult Diabetes Control and Management

Sazlina SG, Mastura I, Ahmad Z, Cheong AT, Adam BM, Jamaiyah H, et al.

Geriatr Gerontol Int, 2014 Jan;14(1):130-7.
PMID: 23581598 DOI: 10.1111/ggi.12070

The aims of the present study were to assess the control of glycemia and other cardiovascular disease risk factors, and the association between age and these controls among older adults with type 2 diabetes in Malaysia.
Fulltext Resting-state electroencephalography (EEG) microstates of healthy individuals following mild sleep deprivation

Khoo SY, Lai WH, On SH, On YY, Adam BM, Law WC, et al.

Sci Rep, 2024 Jul 22;14(1):16820.
PMID: 39039219 DOI: 10.1038/s41598-024-67902-0

Mild sleep deprivation is widespread in many societies worldwide. Electroencephalography (EEG) microstate analysis provides information on spatial and temporal characteristics of resting brain network, serving as an indicator of neurophysiological activities at rest. This study seeks to investigate potential neural markers in EEG following mild sleep deprivation of a single night using EEG microstate analysis. Six-minute resting EEG was conducted on thirty healthy adults within 6 hours of waking in the morning and after at least 18 h of sleep deprivation. Translated and validated Malay language Karolinska Sleepiness Scale was used to assess the participants' degree of sleepiness. Microstate characteristics analysis was conducted on the final 24 subjects based on four standard microstate maps. Microstate C shows a significant increase in mean duration, coverage and occurrence, while microstate D has significantly higher occurrence after sleep deprivation. This study demonstrates notable changes in resting state EEG microstates following mild sleep deprivation. Present findings deepen our understanding of the brain's spatiotemporal dynamics under this condition and suggest the potential utility of neural markers in this domain as components of composite markers for sleep deprivation.
Does ethnicity contribute to the control of cardiovascular risk factors among patients with type 2 diabetes?

Lee PY, Cheong AT, Zaiton A, Mastura I, Chew BH, Sazlina SG, et al.

Asia Pac J Public Health, 2013 Jul;25(4):316-25.
PMID: 22186400 DOI: 10.1177/1010539511430521

This study aimed to examine the control of cardiovascular risk factors among the ethnic groups with type 2 diabetes in Malaysia. The authors analyzed the data of 70 092 adults from the Malaysian diabetes registry database. Malays had the worst achievement of target for most of the risk factors. Indians had poor achievement of control for waist circumference (odds ratio [OR] = 0.6, 95% confidence interval [CI] = 0.6-0.7) and high-density lipoprotein cholesterol (OR = 0.5, 95% CI = 0.4-0.5). As compared with the Malays, the Chinese had a better achievement of target control for the risk factors, including the following: body mass index (OR = 1.3, 95% CI = 1.2-1.4), blood pressure (OR = 1.3, 95% CI = 1.3-1.4), total cholesterol (OR = 1.7, 95% CI = 1.6-1.8), low-density lipoprotein cholesterol (OR = 1.7, 95% CI = 1.6-1.8), glycated hemoglobin A1c (OR = 1.4, 95% CI = 1.3-1.4) and fasting blood glucose (OR = 1.4, 95% CI = 1.3-1.5). Ethnicity, sociocultural factors, and psychobehavioral factors should be addressed in designing and management strategies for the control of cardiovascular risk factors among type 2 diabetes patients.

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