Int J Health Geogr - A spatial and temporal analysis of notifiable gastrointestinal illness in the Northwest Territories, Canada, 1991-2008.

Tópicos

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Resumo

CKGROUND: This is the first study to describe the geographical and temporal distribution of notifiable gastrointestinal illness (NGI) in the Northwest Territories (NWT), Canada. Understanding the distribution of NGI in space and time is important for identifying communities at high risk. Using data derived from the Northwest Territories Communicable Disease Registry (NWT CDR), a number of spatial and temporal techniques were used to explore and analyze NGI incidence from the years 1991 to 2008. Relative risk mapping was used to investigate the variation of disease risk. Scan test statistics were applied to conduct cluster identification in space, time and space-time. Seasonal decomposition of the time series was used to assess seasonal variation and trends in the data.RESULTS: There was geographic variability in the rates of NGI with higher notifications in the south compared to the north. Incidence of NGI exhibited seasonality with peaks in the fall months for most years. Two possible outbreaks were detected in the fall of 1995 and 2001, of which one coincided with a previously recognized outbreak. Overall, incidence of NGI fluctuated from 1991 to 2001 followed by a tendency for rates to decrease from 2002 to 2008.CONCLUSIONS: The distribution of NGI notifications varied widely according to geographic region, season and year. While the analyses highlighted a possible bias in the surveillance data, this information is beneficial for generating hypotheses about risk factors for infection.

Resumo Limpo

ckground first studi describ geograph tempor distribut notifi gastrointestin ill ngi northwest territori nwt canada understand distribut ngi space time import identifi communiti high risk use data deriv northwest territori communic diseas registri nwt cdr number spatial tempor techniqu use explor analyz ngi incid year relat risk map use investig variat diseas risk scan test statist appli conduct cluster identif space time spacetim season decomposit time seri use assess season variat trend dataresult geograph variabl rate ngi higher notif south compar north incid ngi exhibit season peak fall month year two possibl outbreak detect fall one coincid previous recogn outbreak overal incid ngi fluctuat follow tendenc rate decreas conclus distribut ngi notif vari wide accord geograph region season year analys highlight possibl bias surveil data inform benefici generat hypothes risk factor infect

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