Table 4.
Data quality, scaling assumptions and targeting for each scale
| Scales | Items | Data quality | Scaling assumptions | Targeting | |||||
|---|---|---|---|---|---|---|---|---|---|
| Item missing data (%) | Possible range | Actual score range | Mean score | SD | CITC | Floor/ceiling effects (%) | Skew ness | ||
| Cancer Worry | Every day | 1 | 0–3 | 0–3 | 2.19 | 0.72 | 0.61 | 2/36 | −0.64 |
| Relapse | 2 | 0–3 | 0–3 | 1.79 | 0.89 | 0.70 | 7/24 | −0.20 | |
| New cancer | 1 | 0–3 | 0–3 | 1.81 | 0.92 | 0.64 | 9/26 | −0.27 | |
| Back mind | 1 | 0–3 | 0–3 | 1.69 | 0.93 | 0.67 | 10/23 | −0.09 | |
| Have children | 1 | 0–3 | 0–3 | 1.58 | 1.02 | 0.59 | 18/22 | −0.11 | |
| Late effects | 2 | 0–3 | 0–3 | 1.47 | 0.90 | 0.64 | 13/15 | 0.14 | |
| Total | 4 | 0–18 | 1–18 | 10.51 | 4.13 | – | 0/7 | 0.02 | |
| Self‐Management Skills | Answer questions | 4 | 0–3 | 0–3 | 2.46 | 0.57 | 0.46 | 1/49 | −0.65 |
| Decision making | 1 | 0–3 | 0–3 | 2.37 | 0.60 | 0.50 | 1/43 | −0.51 | |
| All appoints | 1 | 0–3 | 0–3 | 2.67 | 0.51 | 0.21 | 1/69 | −1.47 | |
| Ask questions | 4 | 0–3 | 0–3 | 2.02 | 0.71 | 0.57 | 2/24 | −0.33 | |
| Health concerns | 4 | 0–3 | 0–3 | 2.14 | 0.76 | 0.50 | 3/34 | −0.64 | |
| Talk about | 3 | 0–3 | 0–3 | 2.19 | 0.76 | 0.43 | 3/37 | −0.80 | |
| Medicine | 1 | 0–3 | 0–3 | 2.11 | 0.83 | 0.55 | 4/36 | −0.67 | |
| Contact doctor | 1 | 0–3 | 0–3 | 2.06 | 0.80 | 0.58 | 4/31 | −0.57 | |
| Speak to me | 3 | 0–3 | 0–3 | 2.03 | 0.78 | 0.42 | 4/28 | −0.55 | |
| Briefly describe | 1 | 0–3 | 0–3 | 2.24 | 0.72 | 0.35 | 3/37 | −0.94 | |
| Without parent | 2 | 0–3 | 0–3 | 1.33 | 0.83 | 0.29 | 14/9 | 0.26 | |
| Access care | 2 | 0–3 | 0–3 | 1.30 | 0.89 | 0.35 | 19/10 | 0.21 | |
| Book appoints | 2 | 0–3 | 0–3 | 0.87 | 0.78 | 0.47 | 36/6 | 0.88 | |
| Insurance | 4 | 0–3 | 0–3 | 1.01 | 0.90 | 0.33 | 33/7 | 0.60 | |
| Prescriptions | 4 | 0–3 | 0–3 | 0.78 | 0.77 | 0.36 | 40/2 | 0.70 | |
| Total | 12.4 | 0–45 | 3–42 | 17.6 | 5.9 | – | 0/0 | −0.02 | |
| Expectations | Like going | 1 | 0–3 | 0–3 | 1.19 | 0.80 | 0.49 | 20/4 | 0.10 |
| Spend time | 0 | 0–3 | 0–3 | 1.26 | 0.74 | 0.60 | 15/3 | −0.07 | |
| Friend | 1 | 0–3 | 0–3 | 1.19 | 0.76 | .063 | 18/3 | 0.11 | |
| All my needs | 1 | 0–3 | 0–3 | 1.14 | 0.86 | 0.54 | 26/5 | 0.16 | |
| Parents | 0 | 0–3 | 0–3 | 1.05 | 0.80 | 0.39 | 26/3 | 0.29 | |
| Other appoints | 0 | 0–3 | 0–3 | 0.85 | 0.75 | 0.42 | 35/2 | 0.53 | |
| Call anytime | 0 | 0–3 | 0–3 | 0.90 | 0.72 | 0.58 | 29/2 | 0.46 | |
| Reminder call | 0 | 0–3 | 0–3 | 0.71 | 0.76 | 0.44 | 46/3 | 0.91 | |
| Same doctor | 0 | 0–3 | 0–3 | 0.87 | 0.75 | 0.51 | 34/1 | 0.41 | |
| Miss appoint | 0 | 0–3 | 0–3 | 0.74 | 0.70 | 0.53 | 39/1 | 0.63 | |
| On time | 0 | 0–3 | 0–3 | 0.72 | 0.76 | 0.41 | 45/1 | 0.69 | |
| Know history | 0 | 0–3 | 0–3 | 0.47 | 0.63 | 0.46 | 60/1 | 1.16 | |
| Total | 2 | 0–36 | 0–29 | 11.01 | 5.40 | – | 4/0 | 0.07 | |
CITC, corrected item‐total correlation.