Infectious Gastroenteritis as a Risk Factor for Tropical Sprue and Malabsorption: A Case-Control Study

Area of Science:

• Gastroenterology
• Epidemiology
• Military Health

Background:

• Previous research links infectious gastroenteritis (IGE) to functional and pathological gastrointestinal (GI) disorders.
• Studies on the association between IGE and chronic GI conditions like tropical sprue (TS) and intestinal malabsorption (IM) are limited.

Purpose of the Study:

• To investigate the association between documented IGE and the subsequent risk of developing TS and IM.
• To provide the first significant estimates of this association in an active duty military population.

Main Methods:

• A matched case-control study design was employed.
• Data were sourced from the Defense Medical Surveillance System.
• Conditional logistic regression models were used to analyze the relationship between IGE and TS/IM, adjusting for confounders.

Main Results:

• The incidence rates for TS and IM were 0.24 and 1.98 per 100,000 person-years, respectively.
• Prior IGE was significantly associated with increased odds of TS (OR 36.64) and IM (OR 3.93) (p < 0.001).
• Caucasian race, higher education, and non-Army military service were also linked to increased risk.

Conclusions:

• This study provides the first evidence of a significant association between antecedent IGE and an increased risk of TS and IM.
• The development of TS or IM can negatively impact operational efficiency, posing risks to military mission effectiveness.