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Table 2 Efficacy outcomes

From: Durable reduction of Clostridioides difficile infection recurrence and microbiome restoration after treatment with RBX2660: results from an open-label phase 2 clinical trial

 

RBX2660 (n = 142)

Historical control (n = 75)

Recurrence-free rates at 8 weeks post-treatment for evaluable population, % (n/total)

 Rate, % (n/total)

79 (112/142)

31 (23/75)

 Age

  ≥ 65 years

75 (63/84)

20 (9/45)

  < 65 years

85 (49/58)

47 (14/30)

 Sex

  Female

82 (72/88)

33 (16 /48)

  Male

74 (40/54)

26 (7/27)

 Number of prior CDI episodes1

  ≤ 3 CDI episodes

75 (54/72)

33 (22/67)

  > 3 CDI episodes

83 (58/70)

20 (1/5)

 Laboratory test for enrollment1

  PCR

77 (73/95)

31 (19/61)

  EIA

81 (26/32)

29 (2/7)

  Other2

87 (13/15)

50 (2/4)

 Antibiotic at enrolling CDI episode1

  Vancomycin

79 (92/117)

29 (13/45)

  Fidaxomicin

50 (3/6)

25 (1/4)

  Metronidazole

100 (8/8)

20 (1/5)

  Other3

82 (9/11)

50 (9/18)

Sustained CDI recurrence-free rates, % (n/total)

 6 months post-treatment

97 (109/112)

NC

 12 months post-treatment

95 (101/106)

NC

 24 months post-treatment

91 (88/97)

NC

  1. 1Five historical control participants in the FAS (3 participants in evaluable population) had incomplete CDI history records and were not able to be categorized
  2. 2Category ‘other’ for diagnostics included medical record documentation as antigen, empirically tested, loop-mediated isothermal amplification (LAMP), molecular assay, nucleic acid amplification, toxin, toxin with PCR reflex, not reported, or unknown
  3. 3Category ‘other’ for Antibiotics included medical record documentation as any combination of vancomycin, fidaxomicin, metronidazole, rifampin, and rifaximin, as well as unknown and not reported