| |
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
|
- 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.
- 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.
