Table 2 Demographics of patients who developed C. difficile infection after initially testing negative.
Developed CDI
(n = 493)
Did not
developed CDI
(n = 16,697)
P value
Sex, n (%)
  Male252 (51)7391 (44)0.003
  Female241 (49)9306 (56)
Age (year)
  Mean (SD)56.8 (17.7)57.1 (18.6)0.726
  Range18–9518–106
BMI
  Mean (SD)29 (17.7)28 (7.3)0.002
  Range14–7910–100