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Cyclical increase in diverticulitis during the summer months.

Rocco Ricciardi1, Patricia L Roberts, Thomas E Read

  • 1Department of Colon and Rectal Surgery, Lahey Clinic, Tufts University, 41 Mall Road, Burlington, MA 01805, USA. rocco.ricciardi@lahey.org

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Nonelective hospital admissions for diverticulitis show a seasonal pattern, peaking in summer months. This seasonal trend in diverticulitis cases is consistent across various demographics and regions in the US.

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Area of Science:

  • Gastroenterology
  • Epidemiology
  • Public Health

Background:

  • Diverticulitis is a common condition requiring hospitalization.
  • Previous studies have not conclusively established seasonal variations in diverticulitis admissions.

Purpose of the Study:

  • To investigate whether nonelective hospital admissions for diverticulitis exhibit seasonal variation.
  • To analyze demographic and regional factors influencing seasonal trends in diverticulitis admissions.

Main Methods:

  • Retrospective cohort analysis of patients admitted to US community hospitals between 1997 and 2005.
  • Analysis of nonelective admissions and discharges for diverticulitis, standardized to overall inpatient admissions.
  • Statistical analysis to identify seasonal patterns and assess the impact of region, age, sex, and race.

Main Results:

  • A significant seasonal pattern in nonelective diverticulitis admissions was identified, conforming to a sinusoidal pattern (P < .001).
  • Admissions were lowest in February and highest in August, representing a 25.2% increase.
  • A 14.3% increase in diverticulitis discharges was observed in the third quarter compared to the first (P < .001).
  • The excess seasonal burden was consistent across US census regions, age groups, sexes, and races.

Conclusions:

  • Hospitalizations for diverticulitis follow a sinusoidal seasonal pattern, with a notable increase during summer months.
  • This excess summer burden of diverticulitis admissions is widespread across different demographics and geographic regions.
  • Further research into these seasonal trends may help identify potential triggers for diverticulitis.