Stage 4c: construct validity (known-group comparisons) In relation to one of the hypotheses for known-group validity, those who had met the GI-2 outcome at day 3 showed a trend towards higher (better) scores compared with those who had not met the outcome; however, this was not significant.
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Development of a patient-reported outcome measure for gastrointestinal recovery after surgery (PRO-diGI).
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