Publications by authors named "Chor W Sing"

Article Synopsis
  • The study explores the validity of using ICD-9 codes to identify bronchiectasis within Hong Kong's electronic medical record system (CDARS), highlighting the importance of accurate diagnosis in epidemiological research.
  • Researchers reviewed medical records and high-resolution CT scans of 648 bronchiectasis patients from Queen Mary Hospital, achieving a high positive predictive value (PPV) of 92.7%, confirming the accuracy of the coding.
  • This is the first validation study of ICD-9 coding for bronchiectasis in Hong Kong, indicating that ICD-9 code 494 can be relied upon for future clinical research using the CDARS database.
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Background: Electronic health record (EHR) databases can facilitate epidemiology research into various diseases including asthma. Given the diagnostic challenges of asthma, the validity of the coding in EHR requires clarification. We aimed to assess the validity of International Classification of Diseases, 9th Revision (ICD-9) code algorithms for identifying asthma in the territory-wide electronic medical health record system of the Clinical Data Analysis and Reporting System (CDARS) in Hong Kong.

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Objective: Large electronic medical record (EMR) databases can facilitate epidemiology research into uncommon diseases such as interstitial lung disease (ILD). Given the rarity and diagnostic difficulty of ILD, the validity of the coding in EMR requires clarification. We aimed to assess the validity of International Classification of Diseases, 9th Revision (ICD-9) code algorithms for identifying ILD in the territory-wide electronic medical health record system of Clinical Data Analysis and Reporting System (CDARS) in Hong Kong.

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Background: It is unclear whether anticoagulant type is associated with the risk for osteoporotic fracture, a deleterious complication of anticoagulants among patients with atrial fibrillation (AF).

Objective: To compare the risk for osteoporotic fracture between anticoagulants.

Design: Population-based cohort study.

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Importance: The risk of osteoporotic fracture with dabigatran use in patients with nonvalvular atrial fibrillation (NVAF) is unknown.

Objective: To investigate the risk of osteoporotic fracture with dabigatran vs warfarin in patients with NVAF.

Design, Setting, And Participants: Retrospective cohort study using a population-wide database managed by the Hong Kong Hospital Authority.

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Background: This review describes the safety of deferoxamine (DFO), deferiprone (DFP), deferasirox (DFX) and combined therapy in young patients less than 25 yr of age with haemoglobinopathies.

Methods: Searches in electronic literature databases were performed. Studies reporting adverse events associated with iron chelation therapy were included.

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Unlabelled: There is a lack of knowledge regarding the incidence of serious adverse drug reactions (ADR) to the oral iron chelator deferiprone in Chinese children with transfusion-dependent thalassaemia. In this retrospective population-based cohort study, paediatric thalassaemia patients in Hong Kong were screened for serious and medically important adverse events related to deferiprone therapy using diagnosis codes, laboratory data and hospital admissions. Potential ADRs were assessed by reviewing concomitant medications, diagnoses and laboratory data and evaluated using standardised causality assessment.

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Human aldo-keto reductase (AKR) 1C3, type 2 3α-hydroxysteroid dehydrogenase (HSC)/ type 5 17β-HSD, is known to be involved in steroids, prostaglandins, and lipid aldehydes metabolism. The expression of AKR1C3 has been demonstrated in hormone-dependent normal tissues such as breast, endometrium, prostate, and testis; and de -regulated AKR1C3 expression has been shown in breast carcinoma, endometrial hyperplasia, endometrial carcinoma, and prostate carcinoma. AKR1C3 expression has also been demonstrated in hormone-independent normal tissues (renal tubules and urothelium) and neoplastic tissues (renal cell carcinoma, Wilm's tumor, and urothelial cell carcinoma).

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