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Seasonality of sudden infant death syndrome in mainland Britain and Ireland 1985–95
  1. A S Douglasa,
  2. P J Helmsb,
  3. I T Jolliffec
  1. aDepartment of Medicine and Therapeutics, University of Aberdeen, bDepartment of Child Health, University of Aberdeen, cDepartment of Mathematical Sciences, University of Aberdeen
  1. Professor A S Douglas, University Department of Medicine and Therapeutics, Medical School, Foresterhill, Aberdeen AB25 2ZD, UK.

Abstract

By the end of 1995 four years had passed since the dramatic fall in the incidence of sudden infant death syndrome (SIDS), following the “back to sleep” campaign. This time lag permitted a more definitive epidemiological reassessment than had been possible before. The extent of seasonal variation from 1992–5 fell by about half, occurring mainly as a single step down in 1992. The fall was relatively greater in winter than in summer. Before 1992 the extent of seasonal variation (amplitude) was greater in those age ⩾ 5 months compared with those aged ⩽ 4 months. Since 1992 the falls in incidence and amplitude have been greater in the younger group, suggesting that SIDS deaths in younger and older babies may have different causes.

  • sudden infant death syndrome
  • seasonality
  • epidemiological reassessment

https://doi.org/10.1136/adc.79.3.269

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