Dominic K.L. Choy

Comparison of the ISAAC video questionnaire (AVQ 3.0) with the ISAAC written questionnaire for estimating asthma associated with bronchial hyperreactivity

Background A standardized protocol is essential for international comparisons of asthma prevalence and severity. The International Study of Asthma and Allergies in Childhood (ISAAC) used a standardized written questionnaire (WQ) and a video questionnaire (AVQ3.0) to survey the prevalence and severity of asthma in 13–14‐year‐old schoolchildren in different countries.

Prevalence of snoring and sleep-disordered breathing in a group of commercial bus drivers in Hong Kong

Objectives: To assess the prevalence of sleep‐disordered breathing (SDB) and its associated symptoms in a group of commercial bus drivers in Hong Kong.

Royal jelly consumption and hypersensitivity in the community

Background Royal jelly consumption has recently been linked with acute asthma, anaphylaxis and death. A cross‐sectional survey was conducted to detennine the prevalence of and the relationship between royal jelly consumption and hypersensitivity reactions.

Prevalence of latex allergy in hospital staff in Hong Kong

Background The prevalence of latex allergy in healthcare workers in Asian populations is unknown.

Gastro-oesophageal reflux disease and asthma

Abstract Gastro‐oesophageal reflux disease (GOR) and asthma are both common medical conditions that often co‐exist. Studies using oesophageal manometry and 24 h ambulatory pH monitoring have shown that up to 80% of asthmatics have abnormal GOR. A number of mechanisms whereby GOR may trigger asthma have been proposed, and it is believed that acid reflux may stimulate vagal receptors in the lower oesophagus causing reflex bronchoconstriction. However, GOR may be worsened by asthma causing abnormal diaphragm mechanics and by its treatment. Formal evaluation of GOR should be considered a part of asthma assessment, particularly if asthmatic symptoms are precipitated by factors known to trigger GOR such as reclining, alcohol ingestion, and the use of theophylline. Twenty‐four hour ambulatory intra‐oesophageal pH monitoring remains the gold standard for the diagnosis of GOR. Medical therapy with anti‐refux medications, such as acid suppressive agents and prokinetic agents may improve both GOR and asthma control. In those who fail medical therapy, anti–reflux surgery may be warranted in some.

Prevalence of wheeze, bronchial hyper-responsiveness and asthma in the elderly Chinese

Background Asthma is a common health problem affecting patients of all ages. Because of the ease of sampling, epidemiological studies have concentrated mainly on the paediatric and general population.