Limits...
Spatial analysis of falls in an urban community of Hong Kong.

Lai PC, Low CT, Wong M, Wong WC, Chan MH - Int J Health Geogr (2009)

Bottom Line: The results affirm the multi-factorial nature of falls at specific locations and for selected groups of the population.The combined use of descriptive and spatial analyses can be beneficial to policy makers because different preventive measures can be devised based on the types of environmental risk factors identified.The analyses are also important preludes to establishing research hypotheses for more focused studies.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Geography, The University of Hong Kong, Hong Kong. pclai@hkucc.hku.hk

ABSTRACT

Background: Falls are an issue of great public health concern. This study focuses on outdoor falls within an urban community in Hong Kong. Urban environmental hazards are often place-specific and dependent upon the built features, landscape characteristics, and habitual activities. Therefore, falls must be examined with respect to local situations.

Results: This paper uses spatial analysis methods to map fall occurrences and examine possible environmental attributes of falls in an urban community of Hong Kong. The Nearest neighbour hierarchical (Nnh) and Standard Deviational Ellipse (SDE) techniques can offer additional insights about the circumstances and environmental factors that contribute to falls. The results affirm the multi-factorial nature of falls at specific locations and for selected groups of the population.

Conclusion: The techniques to detect hot spots of falls yield meaningful results that enable the identification of high risk locations. The combined use of descriptive and spatial analyses can be beneficial to policy makers because different preventive measures can be devised based on the types of environmental risk factors identified. The analyses are also important preludes to establishing research hypotheses for more focused studies.

Show MeSH

Related in: MedlinePlus

A comparison of Nnh clusters using 100 meters as the threshold distance and varying minimum points per clusters.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC2666650&req=5

Figure 3: A comparison of Nnh clusters using 100 meters as the threshold distance and varying minimum points per clusters.

Mentions: Figure 3a, Figure 3b, and Figure 3c, however, show another set of Nnh clusters based on a threshold distance of 100 meters. By increasing the threshold distance one-fold larger, the maximum coverage of the clusters increases to 12,300 square meters. As a result, some of the hot spots shown in Figure 1a (e.g. clusters near the KWH) begin to encroach upon each other and become a bigger hot spot. An increase in the threshold distance has resulted in hot spots of a larger areal coverage encompassing more than one junction, which can lead to a loss in focus (i.e., the exact location of problematic areas within a hot spot may be obscured).


Spatial analysis of falls in an urban community of Hong Kong.

Lai PC, Low CT, Wong M, Wong WC, Chan MH - Int J Health Geogr (2009)

A comparison of Nnh clusters using 100 meters as the threshold distance and varying minimum points per clusters.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2666650&req=5

Figure 3: A comparison of Nnh clusters using 100 meters as the threshold distance and varying minimum points per clusters.
Mentions: Figure 3a, Figure 3b, and Figure 3c, however, show another set of Nnh clusters based on a threshold distance of 100 meters. By increasing the threshold distance one-fold larger, the maximum coverage of the clusters increases to 12,300 square meters. As a result, some of the hot spots shown in Figure 1a (e.g. clusters near the KWH) begin to encroach upon each other and become a bigger hot spot. An increase in the threshold distance has resulted in hot spots of a larger areal coverage encompassing more than one junction, which can lead to a loss in focus (i.e., the exact location of problematic areas within a hot spot may be obscured).

Bottom Line: The results affirm the multi-factorial nature of falls at specific locations and for selected groups of the population.The combined use of descriptive and spatial analyses can be beneficial to policy makers because different preventive measures can be devised based on the types of environmental risk factors identified.The analyses are also important preludes to establishing research hypotheses for more focused studies.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Geography, The University of Hong Kong, Hong Kong. pclai@hkucc.hku.hk

ABSTRACT

Background: Falls are an issue of great public health concern. This study focuses on outdoor falls within an urban community in Hong Kong. Urban environmental hazards are often place-specific and dependent upon the built features, landscape characteristics, and habitual activities. Therefore, falls must be examined with respect to local situations.

Results: This paper uses spatial analysis methods to map fall occurrences and examine possible environmental attributes of falls in an urban community of Hong Kong. The Nearest neighbour hierarchical (Nnh) and Standard Deviational Ellipse (SDE) techniques can offer additional insights about the circumstances and environmental factors that contribute to falls. The results affirm the multi-factorial nature of falls at specific locations and for selected groups of the population.

Conclusion: The techniques to detect hot spots of falls yield meaningful results that enable the identification of high risk locations. The combined use of descriptive and spatial analyses can be beneficial to policy makers because different preventive measures can be devised based on the types of environmental risk factors identified. The analyses are also important preludes to establishing research hypotheses for more focused studies.

Show MeSH
Related in: MedlinePlus