Table 2 Determination of anchor cutoff value and grouping ^c

Anchor with MCID established(110,32.35%)

①Scores in the scale related to research indicators related scales in subjective anchors (90, 26.47%)

Patients were divided into a minimal change group and an unchanged group according to anchors

②Objective indicator(20, 5.88%)

Rank anchor(270, 79.41%)

①Items of health status evaluation in the scale related to research indicators in subjective anchors(44, 12.94%)

②Patient’s rating of change or patient satisfaction in subjective anchors(226, 66.47%)

5-point Likert (117, 34.41%):

1 = much worse; 2 = a little worse; 3 = no change; 4 = a little better; 5 = much better

minimal improvement group: 2

minimal deterioration group: 4

unchanged group: 3

7-point Likert (65, 19.12%):

1 = very much worse; 2 = much worse; 3 = a little worse, 4 = no change; 5 = a little better; 6 = much better; and 7 = very much better

minimal improvement group:5 or 6

minimal deterioration group: 2 or 3

unchanged group: 4

15-point Likert (32,9.41%):

 -7-A very great deal worse

 -6-A great deal worse

 -5-A good deal worse

 -4-Moderately worse

 -3-Somewhat worse

 -2-A little worse

 -1-Almost the same, hardly any worse at all

 0-No change

 +1-Almost the same, hardly any better at all

 +2-A little better

 +3-Somewhat better

 +4-Moderately better

 +5-A good deal better

 +6-A great deal better

 +7-A very great deal better

minimal improvement group:-2,-3 minimal deterioration group: + 2, + 3

unchanged group: -1, 0, + 1