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Table 1 Summary of measures to be collected

From: The bowel preparation for magnetic resonance enterography in patients with Crohn’s disease: study protocol for a randomized controlled trial

Variable

Visit number/bowel preparation

0/Screening

1/Before

2/During

3/After

Day

~ − 3

− 1

0

1~3

 Female-sex (%)

A

 Age (years) (mean ± SD)

A

 Height (mean ± SD)

A

 Weight (mean ± SD)

A

 Disease duration (years) (mean ± SD)

A

 Disease location (n)

A

  Small bowel disease

A

  Small bowel + colonic disease

A

  Upper GI

A

  Perianal disease

A

 Previous CD-related surgery (n)

A

 HBI

A

 Current medication (n)

A

  Systematic corticosteroids

A

  Thiopurines

A

  Mesalazine

A

  Anti-TNF

A

Mental pressure (median)

A

Degree of discomfort (median)

   

 Nausea

A

A

 Vomiting

A

A

 Bloating

A

A

 

 Abdominal pain

A

A

A

 Diarrhea

A

Distention grade (median)

 Jejunum

A

 Ileum, proximal

A

 Ileum, distal

A

 Colon (right part)

A

 Colon (left part)

A

Preference to the method (n)

A

MRE lesion detection

   

 Terminal ileum

A

 Ileocecal junction

A

 Hepatic flexure of colon

A

 Splenic flexure of colon

A

 Rectosigmoid colon

A

  1. A assessed, − not assessed, SD standard deviation, GI gastrointestinal, CD Crohn’s disease, HBI Harvey Bradshaw Index, TNF tumor necrosis factor
  2. Mental pressure and degree of discomfort: using a visual 5-grade to describe (1 = few, 5 = very severe); distention grade of bowel segments: using a 5-grade scale (1 = 0–20% segmental distention, 2 = 20–40% distention, 3 = 40–60% distention, 4 = 60–80% distention, 5 = 80–100% distention); ileum, distal (the last 20–25 cm of terminal ileum). MRE lesion detection is evaluated by a 5-point scale (lesions locating at the terminal ileum, ileocecal junction, hepatic flexure of colon, splenic flexure of colon, and rectosigmoid colon, consistency of lesion detection from each bowel segment scoring 1 point, otherwise not scoring, confirmed by colonoscopy)