Ngiap Chuan Tan

Prof. Dr. Ngiap Chuan Tan

orcid

Research Focus & Metrics

Academic Career Length

28Years (1999-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 December 2017 in JAMA
Verified
Journal Article
Open access
PDF file
DTDaniel Shu Wei Ting
Daniel Shu Wei Ting
CCCarol Yim-Lui Cheung
Carol Yim-Lui Cheung
GLGilbert Lim
Gilbert Lim
GTGavin Siew Wei Tan
Gavin Siew Wei Tan
NQNguyen D. Quang
Nguyen D. Quang
TWTien Yin Wong
Tien Yin Wong
By 2040, it is projected that approximately 600 million people will have diabetes, with one-third expected to have diabetic retinopathy.1-3 Screening for diabetic retinopathy, coupled with timely referral and treatment, is a universally accepted strategy for blindness prevention.2 However, programs for screening diabetic retinopathy are challenged by issues related to implementation, availability of human assessors, and long-term financial sustainability.2,4-7

1 December 2016 in Ophthalmology
Verified
Journal Article
Closed access
HNHai V. Nguyen
Hai V. Nguyen
GTGavin Siew Wei Tan
Gavin Siew Wei Tan
RTRobyn Jennifer Tapp
Robyn Jennifer Tapp
SMShweta Mital
Shweta Mital
DTDaniel Shu Wei Ting
Daniel Shu Wei Ting
ELEcosse Lamoureux
Ecosse Lamoureux

1 August 2002 in QJM: An International Journal of Medicine
Verified
Journal Article
Open access
PDF file
NTNgiap Chuan Tan
Ngiap Chuan Tan
LCL.‐L. Chan
L.‐L. Chan
Eng King TanEng King Tan
Eng King Tan
Hemifacial spasm (HFS) is characterized by tonic and clonic contractions of the muscles innervated by the ipsilateral facial nerve. It is important to distinguish this from other causes of facial spasms, such as psychogenic facial spasm, facial tic, facial myokymia, blepharospasm, and tardive dyskinesia. Magnetic resonance imaging and angiography studies frequently demonstrate vascular compression of the root exit zone of the facial nerve. Importantly, an underlying space‐occupying lesion needs to be excluded in patients with associated atypical features such as facial numbness and weakness. Botulinum toxin injection to the facial muscles is an effective treatment for HFS, with few disabling side‐effects.

1 January 2018 in The Lancet Respiratory Medicine
Verified
Journal Article
Open access
DPDavid B Price
David B Price
RBRoland Buhl
Roland Buhl
ACAdrian Chan
Adrian Chan
DFDaryl Freeman
Daryl Freeman
EGElizabeth Gardener
Elizabeth Gardener
TLTherese S Lapperre
Therese S Lapperre
Chronic non-specific respiratory symptoms are difficult to manage. This trial aimed to evaluate the association between baseline fractional exhaled nitric oxide (FeNO) and the response to inhaled corticosteroids in patients with non-specific respiratory symptoms. In this double-blind randomised placebo-controlled trial, we enrolled undiagnosed patients, aged 18-80 years, with cough, wheeze, or dyspnoea and less than 20% bronchodilator reversibility across 26 primary care centres and hospitals in the UK and Singapore. Patients were assessed for 2 weeks before being randomly assigned (1:1) to 4 weeks of treatment with extrafine inhaled corticosteroids (QVAR 80 μg, two puffs twice per day, equivalent to 800 μg per day beclomethasone dipropionate) or placebo. Randomisation was stratified by baseline FeNO measurement: normal (≤25 parts per billion [ppb]), intermediate (>25 tp <40 ppb), and high (≥40 ppb). The primary endpoint was change in Asthma Control Questionnaire (ACQ7) mean score. We used generalised linear modelling to assess FeNO as a predictor of response, estimating an interaction effect between FeNO and treatment on change in ACQ7. We did our primary and secondary analyses in the per-protocol set, which excluded patients with non-completion of the primary endpoint, non-compliance to treatment (ascertained by patient report), and study visits made outside the predefined visit windows. This study is registered on ClinicalTrials.gov, number NCT02294279. Between Feb 4, 2015, and July 12, 2016, we randomly assigned 294 patients to extrafine inhaled corticosteroid treatment (n=148) or placebo (n=146). Following exclusions due to protocol violations, we analysed 214 patients (114 extrafine inhaled corticosteroids and 100 placebo). We observed a significant interaction between baseline FeNO and treatment group for every 10 ppb increase in baseline FeNO, with the change in ACQ7 greater in the extrafine inhaled corticosteroids group than in the placebo group (difference between groups 0·071, 95% CI 0·002 to 0·139; p=0·044). The most common adverse events were nasopharyngitis (18 [12%] patients in the treatment group vs 13 [9%] in the placebo group), infections and infestations (25 [17%] vs 21 [14%]), and respiratory, thoracic, and mediastinal disorders (13 [9%] vs 17 [12%]). FeNO measurement is an easy and non-invasive tool to use in clinical practice in patients with non-specific respiratory symptoms to predict response to inhaled corticosteroids. Further research is needed to examine its role in patients with evidence of other airway diseases, such as chronic obstructive pulmonary disease. Sponsored by OPRI with partial funding by Circassia and study drugs provided by TEVA.

29 April 2019 in BMC Geriatrics
Verified
Journal Article
Open access
PDF file
FFFoon Yin Fung
Foon Yin Fung
EKEileen Koh
Eileen Koh
RMRahul Malhotra
Rahul Malhotra
TOTruls Ostbye
Truls Ostbye
PLPing Yein Lee
Ping Yein Lee
NTNgiap Chuan Tan
Ngiap Chuan Tan
Sarcopenia is the age-related loss of muscle mass and function, which increases fall risks in older persons. Hyperglycemia relating to Type-2 Diabetes Mellitus (T2DM) is postulated to aggravate sarcopenia. This study aimed to determine the prevalence of sarcopenia among ambulatory community-dwelling older patients, aged 60–89 years, with T2DM in a primary care setting and to identify factors which mitigate sarcopenia. A total of 387 patients were recruited from a public primary care clinic in Singapore. Data on their socio-demography, clinical and functional status, levels of physical activity (International Physical Activity Questionnaire) and frailty status was collected. The Asian Working Group for Sarcopenia (AWGS) criteria were used to define sarcopenia based on muscle mass, grip strength and gait speed. The study population comprised men (53%), Chinese (69%), mean age = 68.3 ± SD5.66 years, lived in public housing (90%), had hypertension (88%) and dyslipidemia (96%). Their mean muscle mass was 6.3 ± SD1.2 kg/m2; mean gait speed was 1.0 ± SD0.2 m/s and mean grip strength was 25.5 ± SD8.1 kg. Overall, 30% had pre-sarcopenia, 24% with sarcopenia and 4% with severe sarcopenia. Age (OR = 1.14; 95%CI = 1.09–1.20;p < 0.001), multi-morbidity (OR = 1.25;95%CI = 1.05–1.49;p = 0.011) diabetic nephropathy (OR = 2.50;95%CI = 1.35–5.13;p = 0.004), hip circumference (OR = 0.86;95%CI = 0.82–0.90;p < 0.001) and number of clinic visits in past 1 year (OR = 0.74; 95%CI = 0.59–0.92;p = 0.008) were associated with sarcopenia. Using AWGS criteria, 58% of older patients with T2DM had pre-sarcopenia and sarcopenia. Age, diabetic nephropathy, hip circumference, multi-morbidity and fewer clinic visits, but not a recent single HBA1c reading, were significantly associated with sarcopenia among patients with T2DM. A longitudinal relationship between clinic visits and sarcopenia should be further evaluated. (250 words)

1 April 2021 in Clinical Nutrition
Verified
Journal Article
Open access
Samuel ChewSamuel Chew
Samuel Chew
NTNgiap Chuan Tan
Ngiap Chuan Tan
MCMagdalin Cheong
Magdalin Cheong
JOJeffery Oliver
Jeffery Oliver
MBMaria Geraldine E. Baggs
Maria Geraldine E. Baggs
STSiew Ling Tey
Siew Ling Tey
The world's over-65 population is expanding rapidly, and the risk of malnutrition is prevalent in this population. Meeting nutritional needs is a recognized strategy to reduce and address multiple debilitating adverse health outcomes associated with malnutrition. The objective of this randomized, controlled trial was to determine the effects of oral nutritional supplement (ONS) containing beta-hydroxy-beta-methylbutyrate (HMB), along with dietary counseling, on health outcomes in community-dwelling older adults at risk of malnutrition. Strengthening Health In ELDerly through nutrition (SHIELD) studied adults aged ≥ 65 years in Singapore who were recruited between August 2017 and March 2019. Participants were community ambulant and classified as medium or high risk for malnutrition using Malnutrition Universal Screening Tool (MUST). Participants (n = 811) were randomly assigned to one of two study treatments for 180 days: (i) two servings/day of ONS containing HMB with dietary counseling (n = 405) or (ii) two servings/day of placebo supplement with dietary counseling (n = 406). The primary composite outcome was 'survival without hospital (re)admission and with at least 5% weight gain to day 180'. Dietary intakes, nutritional and functional outcomes were measured at baseline, 30, 90, and 180 days. A higher proportion in intervention group met the 180-day primary composite outcome compared to placebo (33.4% vs. 8.7%, P < 0.001), largely driven by body weight component (36.2% vs. 9.4%, P < 0.001). Survival and hospital (re)admission rate were not significantly different between the groups. Weight, BMI, and mid upper arm circumference were significantly greater in the intervention group compared to placebo during the study (all P < 0.001), and at days 30, 90, and 180 (all P < 0.05). The odds of having better nutritional status during the study were also significantly higher in the intervention group compared to placebo, as measured using MUST risk (OR = 2.68, P < 0.001) and vitamin D status (OR = 4.23, P < 0.001). Intervention group had significantly higher energy, protein, fat, and carbohydrate intakes than the placebo group (all P ≤ 0.017). Leg strength at day 90 was significantly greater for the intervention group than for the placebo group (LSM ± SE: 12.85 ± 0.22 vs. 12.17 ± 0.22; P = 0.030). Handgrip strength for females was significantly higher at day 180 for the intervention group compared to placebo (LSM ± SE: 14.18 ± 0.17 vs. 13.70 ± 0.17; P = 0.048). Within the low appendicular skeletal muscle mass index (ASMI) subgroup, the intervention group had significantly greater calf circumference at days 90 and 180 compared to placebo (both P ≤ 0.0289). For community-dwelling older adults at risk of malnutrition, daily consumption of specialized ONS containing HMB and vitamin D for six months, along with dietary counseling, significantly improved nutritional and functional outcomes compared to placebo supplement with dietary counseling. www.ClinicalTrials.govNCT03245047.