AIM: @entity341 ( @entity341 ) visits for food-related @entity56 enable estimation of temporal trends in food @entity566 prevalence. To use this approach in New Zealand requires an understanding of the proportion of @entity341 visits coded as ' @entity2021 , unspecified' or ' @entity566 , unspecified' that are food-related @entity56 . METHOD: We reviewed all @entity341 presentations of @entity1 , coded as ' @entity2021 , unspecified' or ' @entity566 , unspecified', from 1988-2011 to the Auckland City Hospital @entity341 . Charts were reviewed independently by two investigators to determine agreement on categorisation of presentations as being food-related @entity56 . We compared @entity341 presentation rates in different time intervals using rate ratios (RR) and 95% confidence intervals (CI). RESULTS: Sixty-five (29%) of the 221 @entity341 presentations given a discharge code of ' @entity2021 , unspecified' or ' @entity566 , unspecified', were a food-related @entity56 . Inter-observer agreement was very good (kappa >0.80). The @entity341 presentation rate with food-related @entity56 in 2004-2011 was 98% higher than in 1988-1995 (RR=1.98, 95%CI 1.10-3.72). By contrast, @entity341 presentation rates for non-food-related @entity56 did not change over these years. CONCLUSION: @entity341 presentations for food-related @entity56 are identifiable from within @entity341 presentations coded as ' @entity2021 , unspecified' or ' @entity566 , unspecified'. @entity341 presentations for food-related @entity56 have increased over time in Auckland.

Understanding administrative coding of emergency department visits for unspecified XXXX .

@entity1 :: ('9606', 'Species') :: ['children'] @entity566 :: ('MESH:D006967', 'Disease') :: ['allergy'] @entity341 :: ('MESH:D004630', 'Disease') :: ['ED', 'Emergency department'] @entity56 :: ('MESH:D004342', 'Disease') :: ['allergic reaction', 'acute allergic reactions', 'allergic reactions'] @entity2021 :: ('MESH:D000707', 'Disease') :: ['anaphylaxis']
@entity56 :: (MESH:D004342,Disease) :: ['acute allergic reactions']
