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Prevalence of childhood overweight and obesity in Malaysia: a systematic review and meta-analysis

Chua KY, Chua KY, Chinna K, Lim CL, Seneviwickrama M

Clin Exp Pediatr, 2024 Nov 13.
PMID: 39533723 DOI: 10.3345/cep.2024.00899

The incidence of childhood obesity is increasing worldwide. National surveys in Malaysia have shown similar trends. This review aimed to increase our understanding of the prevalence and associated factors of childhood overweight, obesity, and excess weight in Malaysia. A systemat-ic review and meta-analysis were conducted of studies reporting the prevalence of overweight and obesity in Malaysian children aged < 18 years. Systematic searches were conducted in Oc-tober 2023 and repeated in March 2024 of the PubMed, Scopus, and Web of Science databases. The grey literature was also included. Study selection, data extraction, and quality assessments were conducted by paired independent researchers. A meta-analysis of prevalence and 95% confidence interval (CI) using a random-effects model and heterogeneity (I2) was calculated. Publication bias was investigated using Egger's test. This review included 33 studies (N=273,710) conducted between 1996 and 2022. Overall, the childhood overweight, obesity and excess weight prevalence was 13.9% (95% confidence interval [CI], 13.0-14.8%), 11.8% (95% CI, 10.9-12.8%), and 24.0% (95% CI, 22.3-25.7%), respectively. Boys had a significant-ly higher proportion of obesity (12.5% [95% CI, 11.1-14.1%] vs. 9.1% [95% CI, 8.1-10.1%]) and excess weight (25.7% [95% CI, 23.5-28.1%] vs. 20.7% [95% CI, 18.8-22.8%]) than girls. Sarawak natives had a higher prevalence of obesity (17.7% [95% CI, 16.0-19.5%]). Annually, the obesity prevalence increased by 0.3% (95% CI, 0.1-0.6%; p=0.006) and excess weight prevalence increased by 0.6% (95% CI, 0.3-1.0%; p=0.002). Heterogeneity was high (I2>90%), and publication bias was possible (p<0.001). Variability was not significantly affected by the critical appraisal score or sample size. In conclusion, the prevalence of childhood overweight, obesity, and excess weight in Malaysia doubled over 26 years. Future studies of the prevalence of childhood excess weight should follow a standardized reference for body mass index by age to ease interstudy comparisons.
Fulltext Health seeking behavior among Malaysians with acute diarrheal disease

Tee GH, Kaur G, Ramanathan P, Amal NM, Chinna K

Southeast Asian J Trop Med Public Health, 2011 Mar;42(2):424-35.
PMID: 21710867

About 1.8 million people die annually from acute diarrheal disease globally. A nationwide cross-sectional survey was conducted via face-to-face interview with eligible subjects to determine the incidence and health seeking behavior of Malaysians with acute diarrheal disease (ADD). An acute diarrheal episode was defined as having three or more loose stools in any 24 hour period during the four weeks period prior to the interview. The exclusion criteria included pre-existing chronic diarrhea, such as with cancer of the bowel, ulcerative colitis or Chrohn's disease. Forty three point three percent of those with ADD (95% CI 41.3-45.4) sought treatment for the illness. Younger age groups (0-4 years, 67.7%; 95% CI 61.5-73.4; 5-9 years, 56.5%; 95% CI 48.6-64.1) were more likely to seek care for ADD. Seventy-one point eight percent of those seeking treatment, (95% CI 69.0-74.4) did so within 12 hours of the onset of symptoms. Most people with ADD sought treatment at private clinics. The main reasons given for not seeking treatment were the illness was mild and did not warrant treatment and the practice of self-medication (22.4%; 95% CI 20.0-24.9). These findings show self-medication is a major health seeking behavior among Malaysians with ADD. Self-medication of ADD deserves more in-depth study to ensure it is safe.
Keywords: NHMS-2006
Study name: National Health and Morbidity Survey (NHMS-2006)
Fulltext Utility of Equivalence and Cognition Models in Enhancing Validity of Translated Questionnaires: A Methodological Example Using the Heart Quality-of-Life Questionnaire

Lee WL, Lim Abdullah K, Chinna K, Abidin IZ

J Nurs Res, 2020 Dec 07;29(1):e136.
PMID: 33284136 DOI: 10.1097/jnr.0000000000000414

BACKGROUND: The cross-cultural adaptation of questionnaires has tenuous theoretical underpinnings that limit the rigor of data collection and the meaningful analysis of cognitive interview data. An adaptation of existing models of equivalence and cognition provides structure to the comprehensive investigation of various equivalence types in enhancing the validity of translated questionnaires.
PURPOSE: In this study, a framework comprising equivalence and cognition models was used to assess and finalize the Heart Quality-of-Life (HeartQoL)-Bahasa Malaysia (BM) questionnaire, which was derived from both forward-backward (FB) and dual-panel (DP) translation methods.
METHODS: Investigation and finalization of two initial versions of the questionnaire were conducted based on findings from an expert assessment (n = 3 sociolinguists blinded to translation methods) and cognitive interviews with purposively sampled patients (FB: n = 11; DP: n = 11). The equivalence model of Herdman et al. and the question-and-answer model of Collins were adapted to form a "cognition-and-equivalence" model to guide data collection and analysis through modified cognitive interviews. The final HeartQoL-BM was completed by 373 patients with ischemic heart disease from two medical centers, and the data were analyzed using confirmatory factor analysis to assess the evidence of equivalence.
RESULTS: Findings from the expert assessment and cognitive interview showed the existence of semantic and item equivalence on almost all of the FB and DP items, identified some subtle potential equivalence gaps, and guided the process of item finalization. Confirmatory factor analysis, including tests of factorial invariance on the final two-factor model of HeartQoL-BM, confirmed conceptual, item, measurement, and operational equivalence, which supports functional equivalence.
CONCLUSIONS: The potential use of the cognition-and-equivalence model for modified cognitive interviewing and the application of the six equivalence types of Herdman et al. were supported by the HeartQoL-BM showing functional equivalence with its source. HeartQoL-BM is a potentially valid measure of health-related quality of life for patients with ischemic heart disease independent of conditions such as angina, myocardial infarction, and heart failure.
Fulltext Prevalence and factors associated with the use of traditional medicines among human immunodeficiency virus and acquired immunodeficiency syndrome patients in Sokoto, Nigeria

Oche OM, Sadiq UA, Oladigbolu RA, Chinna K

Ann Afr Med, 2018;17(3):125-132.
PMID: 30185681 DOI: 10.4103/aam.aam_39_17

BACKGROUND: In resource-scarce settings like Nigeria, access to conventional drugs and antiretroviral therapy (ART) is highly limited, hence the resort to use of traditional herbal medicine by a significant number of people living with human immunodeficiency virus and acquired immunodeficiency syndrome (HIV/AIDS) (PLWHAs). Traditional medicine (TM) continues to provide health coverage for most of the people in developing countries, and it is equally becoming increasingly popular in western countries.
AIM: This study aims to present the status and use of TM and determine the factors associated with its use among patients with HIV/AIDS on highly active ART in a tertiary health institution in Sokoto, Northwest Nigeria.
METHODOLOGY: This was a descriptive, cross-sectional study involving HIV/AIDS patients attending antiretroviral treatment center of the Usmanu Danfodiyo University Teaching Hospital (UDUTH), Sokoto, Nigeria. The study population comprised PLWHAs attending the ART clinic of the hospital (UDUTH). A total of 271 respondents were recruited into the study and administered a set of pretested structured questionnaire. Ethical approval for this study was obtained from the ethical committee of the teaching hospital.
RESULTS: Only 11 (4.2%) of the respondents had used TM before, of whom 9 (5%) were females and 2 (2.7%) were males with P = 0.399. Only one of the respondents had side effects following the use of TM, and the most common reason for the use of TM was as a result of too much weight loss.
CONCLUSION: Although the use of TM among the study participants in Sokoto was low, there is need to educate PLWHAs about the possible risks of interactions following the concurrent use of TM and ART.
Frail Elders in an Urban District Setting in Malaysia: Multidimensional Frailty and Its Correlates

Sathasivam J, Kamaruzzaman SB, Hairi F, Ng CW, Chinna K

Asia Pac J Public Health, 2015 Nov;27(8 Suppl):52S-61S.
PMID: 25902935 DOI: 10.1177/1010539515583332

In the past decade, the population in Malaysia has been rapidly ageing. This poses new challenges and issues that threaten the ability of the elderly to independently age in place. A multistage cross-sectional study on 789 community-dwelling elderly individuals aged 60 years and above was conducted in an urban district in Malaysia to assess the geriatric syndrome of frailty. Using a multidimensional frailty index, we detected 67.7% prefrail and 5.7% frail elders. Cognitive status was a significant correlate for frailty status among the respondents as well as those who perceived their health status as very poor or quite poor; but self-rated health was no longer significant when controlled for sociodemographic variables. Lower-body weakness and history of falls were associated with increasing frailty levels, and this association persisted in the multivariate model. This study offers support that physical disability, falls, and cognition are important determinants for frailty. This initial work on frailty among urban elders in Malaysia provides important correlations and identifies potential risk factors that can form the basis of information for targeted preventive measures for this vulnerable group in their prefrail state.
Fulltext Psychometric properties of the malay version of the Dutch Eating Behaviour Questionnaire (DEBQ) in a sample of Malaysian adults attending a health care facility

Subramaniam K, Low WY, Chinna K, Chin KF, Krishnaswamy S

Malays J Med Sci, 2017 Aug;24(4):64-73.
PMID: 28951691 MyJurnal DOI: 10.21315/mjms2017.24.4.8

OBJECTIVE: This study aims to investigate the psychometric properties of the Malay version of the Dutch Eating Behaviour Questionnaire (DEBQ) among Malaysian adults.
METHOD: The Malay version of the DEBQ instrument was administered to 398 outpatients (269 women and 129 men) at the University of Malaya Medical Centre (UMMC). Confirmatory Factor Analysis (CFA) was conducted to study the construct validity of the instrument. Composite reliability coefficient, Raykov's rho, was used to determine the internal consistency.
RESULTS: The proposed three-factor structure for the DEBQ instrument was appropriate, although three items (Items 21, 14 and 27) showed problematic loadings with inappropriate model fit and were removed. The modified version had an appropriate model fit χ(2)/df = 2.129, TLI = 0.908, CFI = 0.918, RMSEA = 0.053 (90%CI = 0.048-0.058), close-fit P-value = 0.136 and satisfactory internal consistency of 0.914 for emotional eating scale, 0.819 for external eating scale and 0.856 for restrained eating scale.
DISCUSSION: The Malay version of the DEBQ is a valid instrument to study eating behaviour traits among Malaysian adults. Further research is warranted to determine if Items 14 and 27 are appropriate for the Malaysian population.
Study site: Pharmacy, University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia
Validation of the Malay, English, and Chinese Translations of the 9-Item Shared Decision Making Questionnaire (SDM-Q-9) in Breast Cancer Patients Making Treatment Decisions

Shunnmugam B, Ng CJ, Aishah Mohd Taib N, Chinna K

Asia Pac J Public Health, 2021 11;33(8):914-922.
PMID: 34467767 DOI: 10.1177/10105395211036625

This study aims to test the psychometric properties of the Malay, English, and Chinese 9-Item Shared Decision Making Questionnaire (SDM-Q-9) in breast cancer patients making treatment decisions. The original German SDM-Q-9 was translated to Malay using the back-translation method. A total of 222 newly diagnosed breast cancer patients making treatment decisions were sampled conveniently from three breast clinics between August 2015 and February 2016. A total of 66 patients answered the SDM-Q-9 in Malay, 87 in English, and 69 in Chinese. Data were analyzed using SPSS and AMOS software. SDM-Q-9 demonstrated good reliability in the three translations. All the items correlated well except for Item 1 in English. The factor loadings were within acceptable range except for Item 1 in Malay, Items 1 and 2 in English, and Items 7 and 9 in Chinese SDM-Q-9. However, no items were deleted in accordance with experts' opinions and the previous SDM-Q-9 validation studies. The Malay, English, and Chinese SDM-Q-9 demonstrated good reliability and validity.
Fulltext Psychometric properties and validation of the Positive and Negative Suicide Ideation (PANSI) Inventory in an outpatient clinical population in Malaysia

Sinniah A, Oei TP, Chinna K, Shah SA, Maniam T, Subramaniam P

Front Psychol, 2015;6:1934.
PMID: 26733920 DOI: 10.3389/fpsyg.2015.01934

The PANSI is a measure designed to assess the risk and protective factors related to suicidal behaviors. The present study evaluated the psychometric properties and factor structure of the Positive and Negative Suicide Ideation (PANSI) Inventory in a sample of clinical outpatients at a major hospital in Malaysia. In this study, 283 psychiatric patients and 200 medical (non-psychiatric) patients participated. All the patients completed the PANSI and seven other self-report instruments. Confirmative factor analysis supported the 2-factor oblique model. The internal consistency of the two subscales of PANSI-Negative and the PANSI-Positive were 0.93 and 0.84, respectively. In testing construct validity, PANSI showed sizable correlation with the other seven scales. Criterion validity was supported by scores on PANSI which differentiated psychiatric patients from medical patients. Logistic regression analyses showed PANSI can be used to classify the patients into suicidal or non-suicidal. The PANSI is a reliable and valid instrument to measure the severity of suicidal ideation among clinical outpatients in Malaysia.
Study site: Psychiatric clinic, Medical clinic, Ear, Nose and Throat (ENT) clinic, Ophthalmology clinic and orthopedic clinic, Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM), Kuala Lumpur, Malaysia
Scale, Questionnaire and Device: Positive and Negative Suicide Ideation Inventory (PANSI), Depression Anxiety Stress Scale (DASS-21), Reasons for Living Inventory (RFL), Beck Hopelessness Scale (BHS), Provision of Social Relations (PSR), Satisfaction with Life Scale (SWLS), Rosenberg Self Esteem Scale (RSE), The Adult Trait Hope Scale (ATHS)
Fulltext HIV/AIDS Related Stigma and Discrimination against PLWHA in Nigerian Population

Dahlui M, Azahar N, Bulgiba A, Zaki R, Oche OM, Adekunjo FO, et al.

PLoS One, 2015;10(12):e0143749.
PMID: 26658767 DOI: 10.1371/journal.pone.0143749

HIV/AIDS remain a major public health concern in Nigeria. People living with HIV/AIDS (PLWHA) face not only personal medical problems but also social problems associated with the disease such as stigma and discriminatory attitudes. This study provides an insight into HIV/AIDS related stigma and discrimination against PLWHA in Nigeria.
Validation of the Malay version of the Quality of Life Questionnaire of the European Foundation for Osteoporosis (QUALEFFO-41) in Malaysia

Nagammai T, Mohazmi M, Liew SM, Chinna K, Lai PS

Qual Life Res, 2015 Aug;24(8):2031-7.
PMID: 25648757 DOI: 10.1007/s11136-015-0933-7

PURPOSE: To assess the validity and reliability of the Malay version of the Quality of Life (QOL) Questionnaire of the European Foundation for Osteoporosis (QUALEFFO-41) in Malaysia.
METHODS: The QUALEFFO-41 was translated from English to Malay and administered to 215 post-menopausal osteoporotic women ≥50 years who could understand Malay, at baseline and 4 weeks. The SF-36 was administered at baseline to assess convergent validity. To assess discriminative validity, patients with and without back pain were recruited.
RESULTS: Confirmatory factor analysis showed that the QUALEFFO-41 had five domains. Good internal consistency was seen in all domains (0.752-0.925) except for the social activity domain (0.692). Test-retest reliability showed adequate correlation for all items (0.752-0.964, p < 0.001). Patients with back pain had significantly worse QOL compared with those without (back pain = 42.2 ± 10.9, no back pain = 33.3 ± 8.9; p < 0.001). The total QUALEFFO-41 score and the SF-36 physical and mental composite scores were significantly correlated (-0.636 and -0.529, p < 0.001, respectively).
CONCLUSIONS: The Malay version of the QUALEFFO-41 was found to be a reliable and valid instrument to evaluate the QOL of osteoporotic patients in Malaysia. To enable the QUALEFFO-41 to be used in a multiracial population, further studies should look into validating other versions of the QUALEFFO-41 in Malaysia.
Obesogenic television food advertising to children in Malaysia: sociocultural variations

Ng SH, Kelly B, Se CH, Chinna K, Sameeha MJ, Krishnasamy S, et al.

Glob Health Action, 2014 Dec;7(1):25169.
PMID: 28672562 DOI: 10.3402/gha.v7.25169

Background Food advertising on television (TV) is well known to influence children's purchasing requests and models negative food habits in Western countries. Advertising of unhealthy foods is a contributor to the obesogenic environment that is a key driver of rising rates of childhood obesity. Children in developing countries are more at risk of being targeted by such advertising, as there is a huge potential for market growth of unhealthy foods concomitant with poor regulatory infrastructure. Further, in developing countries with multi-ethnic societies, information is scarce on the nature of TV advertising targeting children. Objectives To measure exposure and power of TV food marketing to children on popular multi-ethnic TV stations in Malaysia. Design Ethnic-specific popular TV channels were identified using industry data. TV transmissions were recorded for each channel from November 2012 to August 2013 (16 hr/day) for randomly selected weekdays and weekend days during normal days and repeated during school holidays (n=88 days). Coded food/beverage advertisements were grouped into core (healthy), non-core (non-healthy), or miscellaneous (unclassified) food categories. Peak viewing time (PVT) and persuasive marketing techniques were identified. Results Non-core foods were predominant in TV food advertising, and rates were greater during school holidays compared to normal days (3.51 vs 1.93 food ads/hr/channel, p<0.001). During normal days' PVT, the ratio of non-core to core food advertising was higher (3.25 food ads/hr/channel), and this more than trebled during school holidays to 10.25 food ads/hr/channel. Popular channels for Indian children had the lowest rate of food advertising relative to other ethnic groups. However, sugary drinks remained a popular non-core product advertised across all broadcast periods and channels. Notably, promotional characters doubled for non-core foods during school holidays compared to normal days (1.91 vs 0.93 food ads/hr/channel, p<0.001). Conclusions This study highlights non-core food advertising, and predominantly sugary drinks are commonly screened on Malaysian TV channels. The majority of these sugary drinks were advertised by multinational companies, and this observation warrants regulatory attention.
Fulltext Effect of nonsurgical periodontal therapy verses oral hygiene instructions on type 2 diabetes subjects with chronic periodontitis: a randomised clinical trial

Raman RP, Taiyeb-Ali TB, Chan SP, Chinna K, Vaithilingam RD

BMC Oral Health, 2014;14:79.
PMID: 24965218 DOI: 10.1186/1472-6831-14-79

40 subjects with type 2 diabetes and moderate to severe CP were randomly distributed to groups receiving either NSPT or OHI. Periodontal parameters, glycosylated haemoglobin (HbA1c) and high-sensitivity C-reactive protein (hs-CRP) were evaluated at baseline, 2- and 3-months intervals.
Fulltext An individually-tailored multifactorial intervention program for older fallers in a middle-income developing country: Malaysian Falls Assessment and Intervention Trial (MyFAIT)

Tan PJ, Khoo EM, Chinna K, Hill KD, Poi PJ, Tan MP

BMC Geriatr, 2014;14:78.
PMID: 24951180 DOI: 10.1186/1471-2318-14-78

Background: In line with a rapidly ageing global population, the rise in the frequency of falls will lead to increased healthcare and social care costs. This study will be one of the few randomized controlled trials evaluating a multifaceted falls intervention in a low-middle income, culturally-diverse older Asian community. The primary objective of our paper is to evaluate whether individually tailored multifactorial interventions will successfully reduce the number of falls among older adults.
Methods: Three hundred community-dwelling older Malaysian adults with a history of (i) two or more falls, or (ii) one injurious fall in the past 12 months will be recruited. Baseline assessment will include cardiovascular, frailty, fracture risk, psychological factors, gait and balance, activities of daily living and visual assessments. Fallers will be randomized into 2 groups: to receive tailored multifactorial interventions (intervention group); or given lifestyle advice with continued conventional care (control group). Multifactorial interventions will target 6 specific risk factors. All participants will be re-assessed after 12 months. The primary outcome measure will be fall recurrence, measured with monthly falls diaries. Secondary outcomes include falls risk factors; and psychological measures including fear of falling, and quality of life.
Discussion: Previous studies evaluating multifactorial interventions in falls have reported variable outcomes.
Given likely cultural, personal, lifestyle and health service differences in Asian countries, it is vital that
individually-tailored multifaceted interventions are evaluated in an Asian population to determine applicability of these interventions in our setting. If successful, these approaches have the potential for widespread application in geriatric healthcare services, will reduce the projected escalation of falls and fall-related injuries, and improve the quality of life of our older community.
Trial registration: ISRCTN11674947
Study: Malaysian Falls Assessment and Intervention Trial; MyFAIT
The effect of facilitated tucking on procedural pain control among premature babies

Lopez O, Subramanian P, Rahmat N, Theam LC, Chinna K, Rosli R

J Clin Nurs, 2015 Jan;24(1-2):183-91.
PMID: 25060423 DOI: 10.1111/jocn.12657

To determine the effectiveness of facilitated tucking in reducing pain when venepuncture is being performed on preterm infants.
Fulltext The influence of fasting insulin level in post-gestational diabetes mellitus women receiving low-glycaemic-index diets

Ghani RA, Shyam S, Arshad F, Wahab NA, Chinna K, Safii NS, et al.

Nutr Diabetes, 2014;4:e107.
PMID: 24535618 DOI: 10.1038/nutd.2014.5

Post-gestational diabetes mellitus (GDM) women are recommended weight loss to manage increased cardio-metabolic risks. We investigated the effects of lowering diet glycaemic index (GI) on fasting blood glucose (FBG), serum lipids, body weight and composition of post-GDM women with varying fasting insulin levels (INS). Seventy-seven Asian, non-diabetic women with previous GDM (aged 20-40 years, mean BMI: 26.4±4.6 kg m(-2)) were recruited. At baseline, 20 subjects with INS <2 μIU ml(-1) and 18 with INS 2 μIU ml(-1) received conventional dietary recommendations (CHDR) only. CHDR emphasised energy and fat intake restriction and encouraged increase in dietary fibre intakes. Twenty-four subjects with INS <2 μIU ml(-1) and 15 with INS 2 μIU ml(-1), in addition to CHDR, received low-GI education (LGI). Changes in FBG, serum lipids, body weight and body composition were evaluated. Subjects with INS <2 μIU ml(-1) had similar outcomes with both diets. After 1 year, subjects with INS 2 μIU ml(-1) who received LGI education had reductions in FBG and triglycerides. Subjects who received CHDR observed increase in both FBG and triglycerides (P<0.05). Among all subjects, diet GI was lower and dietary fibre intakes were higher in LGI compared with CHDR subjects (all P<0.05). Thus, in Asian post-GDM women with normal/higher INS, adding low-GI education to CHDR improved management of FBG and triglycerides.
Effect of a reminder system using an automated short message service on medication adherence following acute coronary syndrome

Khonsari S, Subramanian P, Chinna K, Latif LA, Ling LW, Gholami O

Eur J Cardiovasc Nurs, 2015 Apr;14(2):170-9.
PMID: 24491349 DOI: 10.1177/1474515114521910

Medication non-adherence leads to a vast range of negative outcomes in patients with coronary artery disease. An automated web-based system managing short message service (SMS) reminders is a telemedicine approach to optimise adherence among patients who frequently forget to take their medications or miss the timing.
Psychometric properties of the self-report Malay version of the Pediatric Quality of Life (PedsQLTM) 4.0 Generic Core Scales among multiethnic Malaysian adolescents

Ainuddin HA, Loh SY, Chinna K, Low WY, Roslani AC

J Child Health Care, 2015 Jun;19(2):229-38.
PMID: 24154841 DOI: 10.1177/1367493513504834

Adolescence is the potential period for growth and optimal functioning, but developmental issues like time of transition from childhood to adulthood will create stress and affect the adolescent's quality of life (QOL). However, there is a lack of research tool for measuring adolescent's QOL in Malaysia. The aim of the study was to determine the validity and reliability of the self-report Malay version of the pediatric QOL (PedsQL™) 4.0 Generic Core Scales in assessing the QOL of Malaysian adolescents. A cross-sectional study design using the 23-item self-report Malay version of the PedsQL 4.0 Generic Core Scales was administered on a convenient cluster sampling (n = 297 adolescent) from a secondary school. The internal consistency reliability had Cronbach's α values ranging from .70 to .89. Factor analysis reported a six-factor structure via principal axis factor analysis. In conclusion, the self-report Malay version of the pediatric QOL 4.0 Generic Core Scales is a reliable and valid tool to measure the QOL of multiethnic Malaysian adolescents.
Fulltext Ethnic differences in the prognostic utility of rheumatoid factor isotypes and anticyclic citrullinated peptides in rheumatoid arthritis patients: a cross-sectional study

Gomez EL, Gun SC, Somanath SD, Chinna K, Radhakrishnan AK

Mod Rheumatol, 2013 Jul;23(4):716-21.
PMID: 22854883 DOI: 10.1007/s10165-012-0718-6

OBJECTIVES: The prognostic significance of rheumatoid factor (RF) and anticyclic citrullinated peptide antibody (anti-CCP) in rheumatoid arthritis (RA) remains contentious due to the conflicting lines of evidence. This study aims to determine the association between RF isotypes and anti-CCP with disease severity in RA patients from three ethnic groups.
METHODS: A total of 147 RA patients from three different ethnic groups (Malays, Chinese, and Indians) who fulfilled the 1987 American College of Rheumatology (ACR) revised criteria for RA were recruited into this study. The seroprevalence of RF isotypes immunoglobulin (Ig)A, IgG, and IgM, as well as anti-CCP was determined using commercial enzyme-linked immunosorbent assay (ELISA) kits. Multinomial regression analysis was performed to assess the independent effects of autoantibody status on the development of deforming and erosive RA and the presence of extra-articular manifestations (EAM).
RESULTS: In Chinese patients, we found a significant association (p < 0.05) between IgG RF and anti-CCP and the presence of erosive disease, as well as IgM RF and IgG RF with the presence of joint deformities. In Indian patients, IgM RF was associated with deforming disease, whereas none of the antibodies were associated with disease severity in Malay patients. Multinomial regression analysis revealed that IgG RF was the most important predictor variable for erosive disease in Chinese patients, and IgM RF the only predictor variable associated with deforming disease in both Chinese and Indian RA patients.
CONCLUSIONS: There is variability in the phenotypic association of RF isotypes and anti-CCP in relation to disease severity of RA in the three ethnic groups. RF, in particular, IgG and IgM, may be better prognosticators of severe disease in Chinese and Indian patients.
Prevalence of obesity and factors associated with it in a worksite setting in Malaysia

Cheong SM, Kandiah M, Chinna K, Chan YM, Saad HA

J Community Health, 2010 Dec;35(6):698-705.
PMID: 20458526 DOI: 10.1007/s10900-010-9274-1

Socio-economic status, lifestyle behaviors, and psychosocial factors have been implicated in the development of overweight and obesity. This study aims to observe the prevalence of overweight and obesity in an academic worksite and to examine the possible association between variables such as socio-economic characteristics, work factors, psychosocial factors, and weight control behaviors and obesity. In this study, the target population were full-time academic and non-academic staff. Body mass index (BMI) and waist circumference (WC) were computed to determine obesity. A pretested self-administered questionnaire was used to obtain information on socio-demographic factors, work related factors, psychosocial factors, and weight control behaviors. Data were obtained on 367 adults of whom 39.2% were males and 60.8% females. Overweight was seen in 31.9% of males and 26.5% of females while 16.1% of them were obese, irrespective of gender. Central obesity was noted in about 37% of males and 39% of females. The results showed that socio-demographic factors (age, gender, and education) and psychosocial factors (perceived health status, body weight perception, and weight-control goals) were significantly associated with BMI. Working hours were also significantly associated with BMI. However, weight control practices (diet-control practices and physical activity practices) were not significantly associated with BMI. In conclusion, this study found a higher prevalence of overweight and obesity among employees of a selected public university in comparison to the general population. Socio-demographic, psychosocial factors, and working hours were found to contribute to obesity in this sample of adults.
Fulltext The prevalence of rheumatoid factor isotypes and anti-cyclic citrullinated peptides in Malaysian rheumatoid arthritis patients

Gomez EL, Gun SC, Somnath SD, D'Souza B, Lim AL, Chinna K, et al.

Int J Rheum Dis, 2011 Feb;14(1):12-7.
PMID: 21303477 DOI: 10.1111/j.1756-185X.2010.01573.x

AIM: The purpose of this study is to compare the prevalence of rheumatoid factor (RF) isotypes and second generation anti-cyclic citrullinated peptides (anti-CCP) in Malaysian rheumatoid arthritis (RA) patients.
METHODS: In this cross-sectional study, 147 established RA patients from three ethnic groups were recruited from a major rheumatology clinic in Malaysia. Enzyme-linked immunosorbent assays (ELISA) for serum RF isotypes IgA, IgG and IgM as well as second-generation anti-CCP were performed and the prevalence of each auto-antibody was compared in the three ethnic groups.
RESULTS: The anti-CCP was the most prevalent auto-antibody in each of the ethnic groups, followed closely by RF IgM and RF IgG. Rheumatoid factor IgA was the least prevalent across all three ethnic groups. The anti-CCP-RF IgM combination provided the best test sensitivity. Seroprevalence of anti-CCP was strongly associated with the presence of each of the RF isotypes. The seroprevalence of RF and anti-CCP did not increase or decrease with advancing age, age at onset and disease duration.
CONCLUSION: When used alone, anti-CCP provides a diagnostic advantage over RF IgM on the basis of test sensitivity. Considering the high cost of the anti-CCP assay, step-wise serum testing with IgM RF followed by anti-CCP may provide a more economically sensible option to optimize test sensitivity for RA.
Study site: Rheumatology clinic, Hospital Tuanku Jaafar, Seremban, Negeri Sembilan, Malaysia

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