May 2015 Quiz 1

ANSWER: C
 
Critique

A recent Olmstead County, Minn., study was undertaken to understand the epidemiology of community-acquired C. difficile infections. In the cohort of 385 proven C. difficile infections, 41% were community acquired. Compared to cases acquired in the hospital, community C. difficile infections were observed in younger (B) females (A) who had lower comorbidity scores and fewer chronic illnesses (D). Also, these outpatient cases were less likely to have recent antibiotic exposure (E) and fortunately had less severe clinical courses. A large population-based study and several others have confirmed that the use of gastric acid-suppressive agents such as PPIs (C) increases the risk of C. difficile-associated disease (adjusted risk ratio 2.9, 95% CI: 2.4-3.4).
 
References

1. Khanna S., Pardi D.S., Aronson S.L., et al. The epidemiology of community-acquired Clostridium difficile infection: a population-based study. Am. J. Gastroenterol. 2012;107:89-95.
2. Dial S., Delaney J.A., Barkun A.N., Suissa S. Use of gastric acid-suppressive agents and the risk of community-acquired Clostridium difficile-associated disease. JAMA 2005;294:2989.

ANSWER: C
 
Critique

A recent Olmstead County, Minn., study was undertaken to understand the epidemiology of community-acquired C. difficile infections. In the cohort of 385 proven C. difficile infections, 41% were community acquired. Compared to cases acquired in the hospital, community C. difficile infections were observed in younger (B) females (A) who had lower comorbidity scores and fewer chronic illnesses (D). Also, these outpatient cases were less likely to have recent antibiotic exposure (E) and fortunately had less severe clinical courses. A large population-based study and several others have confirmed that the use of gastric acid-suppressive agents such as PPIs (C) increases the risk of C. difficile-associated disease (adjusted risk ratio 2.9, 95% CI: 2.4-3.4).
 
References

1. Khanna S., Pardi D.S., Aronson S.L., et al. The epidemiology of community-acquired Clostridium difficile infection: a population-based study. Am. J. Gastroenterol. 2012;107:89-95.
2. Dial S., Delaney J.A., Barkun A.N., Suissa S. Use of gastric acid-suppressive agents and the risk of community-acquired Clostridium difficile-associated disease. JAMA 2005;294:2989.

ANSWER: C
 
Critique

A recent Olmstead County, Minn., study was undertaken to understand the epidemiology of community-acquired C. difficile infections. In the cohort of 385 proven C. difficile infections, 41% were community acquired. Compared to cases acquired in the hospital, community C. difficile infections were observed in younger (B) females (A) who had lower comorbidity scores and fewer chronic illnesses (D). Also, these outpatient cases were less likely to have recent antibiotic exposure (E) and fortunately had less severe clinical courses. A large population-based study and several others have confirmed that the use of gastric acid-suppressive agents such as PPIs (C) increases the risk of C. difficile-associated disease (adjusted risk ratio 2.9, 95% CI: 2.4-3.4).
 
References

1. Khanna S., Pardi D.S., Aronson S.L., et al. The epidemiology of community-acquired Clostridium difficile infection: a population-based study. Am. J. Gastroenterol. 2012;107:89-95.
2. Dial S., Delaney J.A., Barkun A.N., Suissa S. Use of gastric acid-suppressive agents and the risk of community-acquired Clostridium difficile-associated disease. JAMA 2005;294:2989.