The Scientific World Journal / 2013 / Article / Tab 1

Clinical Study

A Thirty-Year Follow-Up Surveillance Study for Neoplasia of a Dutch Ulcerative Colitis Cohort

Table 1

Characteristics of the patient population .

Mean (sd)Range
yearsMin. Max.

Age at diagnosis33.8 (13.8)4.169.4
Age at first surveillance colonoscopy44.1 (13.8)18.279.3
Age at end of follow-up53.1 (14.8)21.284.0
Time from onset of symptoms to first surveillance colonoscopy12.0 (4.7)8.038.0
Follow-up period of intact colon*10.8 (6.9)0.127.1
Interval between surveillance colonoscopies*2.0 (1.2)0.110.1
Age at death 68.1 (16.3)26.397.6

Only patients with follow-up colonoscopies, .

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