Table 2 The seventeen phenotypic features observed by patients who had a flare in the last 12 months

last_flare: When was your last IBD flare period?

 ( ) Less than 3 months ago [1]

 ( ) 3–6 months ago [1]

 ( ) 6–12 months ago [0]

 ( ) More than a year ago [removed]

typical_adbom_pain: How often were you troubled by pain in your abdomen during a typical flare last year?

 ( ) All of the time [1]

 ( ) Most of the time [1]

 ( ) A good bit of the time [1]

 ( ) Some of the time [1]

 ( ) A little of the time [0]

 ( ) Hardly any of the time [0]

 ( ) None of the time [0]

abdom_pain_severity: How intense was your worst pain rated on a 0–10 scale, where 0 is 'no pain' and 10 is 'pain as bad as could be' during a typical flare in the last year?

 ( ) 0–4 [0]

  ( ) 5–10 [1]

bowel_movements: Think about the baseline number of daily bowel movements you had before you got sick. During a typical flare in the past year, how has your number of daily bowel movements compared to this baseline?

 ( ) more daily bowel movements than my baseline [1]

 ( ) the same number of daily bowel movements as my baseline [0]

 ( ) I have had fewer daily bowel movements than my baseline[0]

gi_symptoms: During a typical flare in the last year, what digestion-related symptoms have you experienced?

Count the number of symptoms chosen. >  = 3 [1] otherwise [0]

 [ ] Diarrhea; [ ] Ribbon-shaped stool; [ ] Blood tinged stool; [ ] Blood in the toilet bowl;

 [ ] Bloating; [ ] Abdominal pain; [ ] Excessive flatulence; [ ] None of the above

surgery_any: Have you undergone any surgeries to treat your IBD?

 ( ) yes [1] and ( ) no [0]

symptoms_last_year: Which of the following best describes your IBD-related symptoms in the last year?

 ( ) Remission (no symptoms) [0]

 ( ) Mild symptoms (some symptoms but no need for steroids or immunosuppressive or biologic medication) [0]

 ( ) Periods of flares and remissions (flares requiring steroids or immunosuppressive medication) [1]

 ( ) Chronically active disease (continual experience of moderate to severe symptoms) [1]

peripheral_arthritis: Joint pain or stiffness in your arms and legs

 ( ) yes [1] and ( ) no [0]

axial_arthritis: Joint pain or stiffness in your back or spine

 ( ) yes [1] and ( ) no [0]

osteoporosis: Osteoporosis

 ( ) yes [1] and ( ) no [0]

osteopenia: Low bone density or bone loss (osteopenia)

 ( ) yes [1] and ( ) no [0]

skin: Have you experienced any skin conditions?

 ( ) yes [1] and ( ) no [0]

fissure: A fissure (#40)

 ( ) yes [1] and ( ) no [0]

abdominal_abcess: An abscess in your abdomen

 ( ) yes [1] and ( ) no [0]

perianal_abcess: Perianal abscess (an infection around the anus)

 ( ) yes [1] and ( ) no [0]

stricture: A stricture (narrowing or blockage of the bowel)

 ( ) yes [1] and ( ) no [0]

psc: Primary sclerosing cholangitis (PSC)

 ( ) yes [1] and ( ) no [0]