Table 3. Baseline characteristics and outcomes associated with an emergent ribotype 255 compared to two other endemic ribotypes in Houston, Texas.

	Ribotype
	255 n = 50	027 n = 50	p-value 255 vs 027	014–020 n = 50	p-value 255 vs 014–020
Age, mean years (±SD)	59.3 (±16.8)	69.3 (±13.6)	0.001	61 (±18.3)	0.63
CCI score, median (IQR)	2 (1–3)	3 (2–5)	0.014	2 (1–4)	0.34
Initial clinical cure, no. (%)	38 (76)	30 (60)	0.09	38 (76)	Not tested
Severe/fulminant disease, no. (%)	19 (38)	40 (80)	<0.001	20 (40)	0.83
CDI complications†	5 (10)	14 (28)	0.02	9 (18)	0.25
30d recurrence, no. (%)	2 (4)	2 (4)	Not tested	3 (6)	0.64
90d recurrence‡, no. (%)	5 (10)	10 (20)	0.17	4 (8)	0.70
All-cause 30d mortality, no (%)	5 (6)	8 (16)	0.37	6 (12)	0.75

Abbreviations: Charlson Comorbidity Index (CCI), standard deviation (SD), C. difficile infection (CDI).

^†Includes ICU admission, colectomy, ileus, and toxic megacolon, ^‡90-day recurrence includes those with 30-day recurrence.