Table 2.

Relative Risk of Clostridioides difficile Infection per Toxin Status of Carried C. difficile Isolates in Intensive Care Unit Patients

Relative Risk From Carriage of Toxin-encoding Strains	Developed CDI	Did Not Develop CDI
ICU patients carrying a toxin-encoding strain	5	89
ICU noncarriers and non–toxin-encoding carriers	10	1742
Relative risk from carriage of non–toxin encoding strains	Developed CDI	Did not develop CDI
ICU patients carrying a non–toxin-encoding strain	0	45
ICU noncarriers	15	1786

CDI relative risk from carriage of toxin-encoding C. difficile: 9.32; 95% confidence interval: 3.25–26.7; P < .001. CDI relative risk from carriage of non–toxin-encoding C. difficile: 1.26; 95% confidence interval: .08–20.8; P = .87.

Abbreviations: CDI, Clostridioides difficile infection; ICU, intensive care unit.