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Table 3 ACTS Burdens and Benefits scales - EINSTEIN DVT dataset (all countries): data quality, scaling assumptions, targeting, reliability (N=1336)

From: The Anti-Clot Treatment Scale (ACTS) in clinical trials: cross-cultural validation in venous thromboembolism patients

  Data quality Scaling assumptions Targeting Reliability
  Item missing data (%)a Possible range (midpoint) Actual score range Mean score SD CITC Floor/ceiling effects (%)b Skewness Cronbach’s alpha Test-retestc Mean IICd Range IIC
Burden items             
Q1 Bleeding/vigorous activities 1 1–5 1–5 4.26 1.03 0.50 3/57 −1.41 - - - -
Q2 Bleeding/usual activities 1 1–5 1–5 4.47 0.86 0.50 1/65 −1.79 - - - -
Q3 Bruising 0 1–5 1–5 4.39 0.87 0.45 1/58 −1.49 - - - -
Q4 Avoid other medicines 0 1–5 1–5 4.54 0.80 0.39 1/69 −1.84 - - - -
Q5 Limit eat/drink 0 1–5 1–5 4.55 0.78 0.46 1/69 −1.87 - - - -
Q6 Hassle/daily 0 1–5 1–5 4.41 0.78 0.60 0/56 −1.22 - - - -
Q7 Hassle/occasional 1 1–5 1–5 4.02 0.98 0.57 2/38 −0.85 - - - -
Q8 Difficult to follow your ACT 0 1–5 1–5 4.71 0.58 0.52 0/77 −2.19 - - - -
Q9 Time-consuming ACT 0 1–5 1–5 4.52 0.69 0.43 0/62 −1.40 - - - -
Q10 Worry about ACT 1 1–5 1–5 4.07 0.91 0.56 1/37 −0.84 - - - -
Q11 Frustrating ACT 0 1–5 1–5 4.45 0.87 0.61 1/64 −1.76 - - - -
Q12 Burden of ACT 1 1–5 1–5 4.49 0.75 0.65 0/62 −1.52 - - - -
ACTS Burdens scale 4 12–60 (36) 23–60 52.9 6.1 - 0/11 −1.08 0.85 0.97 0.32 0.13–0.66
Benefit items             
Q14 Confident in ACT 1 1–5 1–5 3.77 0.91 0.71 3/19 −0.88 - - - -
Q15 Reassured by ACT 1 1–5 1–5 3.71 0.87 0.80 3/15 −0.84 - - - -
Q16 Satisfied with ACT 0 1–5 1–5 3.79 0.90 0.69 3/19 −0.92 - - - -
ACTS Benefits scale 1 3–15 (9) 3–15 11.3 2.4 - 1/10 −0.80 0.86 0.86 0.67 0.59–0.73
  1. aLess than 0.5% missing data rounded to 0. bCalculated as the percentage of people scoring either 12 (floor) or 60 (ceiling) on the ACTS Burdens scale or 3 (floor) or 15 (ceiling) on the ACTS Benefits scale. cTest-retest between two administrations at 12 weeks. dRepresenting homogeneity.
  2. ACT anticoagulation treatment, ACTS Anti-Clot Treatment Scale, CITC corrected item-total correlation, IIC item-item correlation, SD standard deviation, - analyses not conducted owing to lack of data.