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Table 7 Patient’s Global Impression of Change (PGIC): Overall Study Results

From: Prospective study of recovery from copperhead snake envenomation: an observational study

  Day 3 Day 7 Day 14 Day 21 Day 28
  Median Range Median Range Median Range Median Range Median Range
Scale One score 5 1, 7 6 2, 7 6 2, 7 7 1, 7 7 1, 7
Scale Two score 4 0, 9 2 0, 4 1 0, 6 0 0, 5 0 0, 9
  1. Both scores assess the patient’s self-report of change, “since beginning treatment at this clinic” [14]. Scale one is a 7-item Likert scale, ranging from 1 (“No change (or condition has gotten worse)”) to 7 (“A great deal better, and a considerable improvement that has made all the difference”). Scale two is an 11-item Likert scale, ranging from 0 (“Much better”) to 10 (“Much worse”). Therefore, higher scores on scale one indicate more recovery and higher scores on scale two indicate less recovery. Data based on 20 subjects except for Day 3 (n =19). The day of envenomation is Day 0. One subject provided an anomalous result to the Scale Two score on Day 28 (see text).