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Table 3 Study assessments

From: PRIMIS: design of a pivotal, randomized, phase 3 study evaluating the safety and efficacy of the nonsteroidal farnesoid X receptor agonist cilofexor in noncirrhotic patients with primary sclerosing cholangitis

Parameter

Assessment

Timing

Histologic staging of fibrosis

Liver biopsy

Screening and Week 96 (or ET) during blinded phase

Liver biochemistry

ALP, GGT, ALT, AST, bilirubin, albumin, and INR

Screening, baseline, and Weeks 4, 8, 12, 24, 36, 48, 60, 72, 84, and 96 (or ET) during blinded phase; OLE baseline, and Weeks 4, 24, 48, 72, and 96 (or ET)

Clinical liver assessments

Ascites, hepatic encephalopathy, calculation of MELD and CP scores

Markers of bile acid homeostasis

Serum bile acids

Screening, baseline, and Weeks 4, 12, 24, 48, 72, and 96 (or ET) during blinded phase; OLE baseline, and Weeks 48 and 96 (or ET)

Noninvasive markers of liver fibrosis

Liver stiffness by FibroScan

Screening and every 24 weeks (or ET) during blinded phase; OLE baseline and every 24 weeks (or ET)

ELF

Screening, baseline, and Weeks 4, 12, 24, 48, 72, and 96 (or ET) during blinded phase; OLE baseline, and Weeks 48 and 96 (or ET)

Biliary strictures

MRCP

Baseline, and Weeks 48 and 96 (or ET) during blinded phase

Health resource utilization and HRQOL

SIBDQ (for patients with

history of IBD), CLDQ,

EQ-5D,a and PSC-PRO

Baseline and every 24 weeks (or ET) during blinded phase; OLE baseline and every 24 weeks (or ET)

Safety

AEs, clinical laboratory tests, vital sign assessments, and concomitant medications

Various time points throughout study

  1. aEuroQol, Rotterdam, the Netherlands
  2. AEs adverse events; ALP alkaline phosphatase; ALT alanine aminotransferase; AST aspartate aminotransferase; CLDQ chronic liver disease questionnaire; CP child–pugh; ELF enhanced liver fibrosis score; ET early termination; GGT γ-glutamyltransferase; HRQOL health-related quality of life; IBD inflammatory bowel disease; INR international normalized ratio; MELD model for end-stage liver disease; MRCP magnetic resonance cholangiopancreatography; OLE open-label extension; PSC-PRO primary sclerosing cholangitis-patient-reported outcome; SIBDQ short inflammatory bowel disease questionnaire