Rank: New forum user 
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Can anyone expain what do TRENDS and PATTERNS mean in the context of accident investigation?
Cheers,
Shah
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Rank: Super forum user 
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Are you sure you mean accident investigation? Trends and patterns are more likely to be associated with accident statistics (which might include the findings of investigations but not the investigation process itself).
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Rank: Super forum user
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Assuming you mean accident statistics:
Trends are changes over time. For example, you used to have lots of hand injuries but the number of hand injuries has been decreasing, or the main cause of accidents used to be operator error but now it is poor maintenance.
Patterns are consistent features of the data. For example, you consistently have more injuries on the night shift than the day shift, or there is a particular work group that reports fewer accidents than the others, or you find there is more sickness absence on Mondays than any other day.
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Rank: Super forum user 
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Here's my two pennyworth.
Trends are things that occur more than once, i.e. hand injuries, and when the number increases at an unacceptable rate it indicates something needs to be done to prevent more.
Patterns are the consequence of things that happen, i.e. a visit to A&E by certain sectors of the community that can be split into the various groups according to age, method of transport, reasons for attendance etc.
A trend can be halted where a Pattern cannot.
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