(added on 2009/08/19)
Breathless but not quite the same 不一樣的氣促
Map shows the home locations of patients presenting with shortness of breath at the emergency room of a hospital in Hong Kong over a three-month observation period. Though symptomatically similar, the geographic distribution of asthma (white circles and white bars) and chronic obstructive airway disease (COAD) (purple circles and purple bars) patients varied considerably. COAD is a chronic condition affecting older people. It is therefore not surprising that their locations often overlapped those of homes for elderly people (shown as houses in navy blue). In some cases, COAD and asthma co-existed (white circles with thick purple boundaries), which may suggest the same triggering factor for breathless attacks in the environment.
Data were extracted from the dataset of a pilot study on fever surveillance conducted at the Alice Ho Miu Ling Nethersole Hospital in Tai Po District in Hong Kong between September and December 2005. The light green areas are DCCAs (District Council Constituency Areas) in central Tai Po where most people in the District live.