Table 3.
Acceptability measures for multi-item and single-item questions within C-CAP1 and C-CAP2
| Score mean | Missing data | Floor/ceiling effectsa | |
|---|---|---|---|
| C-CAP1 (pre-ablation) n = 517 | |||
| Q1–3b: treatment expectations (4 items; score range 0–16) | 4.9 (SD 2.0) | 3.5 % | 0.6 %/0.2 % |
| Q4: first ablation procedure (1 item; binary) | 71 % (Y); 27 % (N) | 1.4 % | N/A |
| Q6: symptom severity index (15 items; score range 0–45) | 15.6 (SD 8.6) | 16.2 % | 1.8 %/0.0 % |
| Q7–8: frequency and Duration (2 items; score range 0–8) | 4.6 (SD 2.0) | 3.1 % | 7.4 %/9.2 % |
| Q9: days impact (work/school) (1 item; score range 0–30) | 6.1 (SD 10.3) | 2.1 % (65.0 % N/Ab) |
52.9 %/12.9 % |
| Q10: days impact (social activities) (1 item; score range 0–30) | 8.6 (SD 10.3) | 3.9 % (34.4 % N/Ab) |
27.0 %/12.2 % |
| Q11: days impact (normal activities) (1 item; score range 0–30) | 8.7 (SD 10.4) | 4.1 % (30.2 % N/Ab) | 26.0 %/13.5 % |
| Q12a: GP visits in last 30 days (1 item; score range 0–30) | 0.6 (SD 1.1) | 25.0 % | 66.0 %/0 % |
| Q12b: hospital visits in last 30 days (1 item; score range 0–30) | 0.7 (SD 1.0) | 22.8 % | 58.4 %/0 % |
| Q13: impact on life (10 items; score range 0–30) | 13.8 (SD 7.5) | 6.6 % | 1.4 %/0.3 % |
| Q14: medication taken for arrhythmia (1 item; binary) | 82 % (Y); 18 % (N) | 0.4 % | N/A |
| Q16: importance of reducing medication (1 item; score range 0–3) | N/A = 1 % Not important = 7 %; Quite important = 24 %; Very important = 48 % |
19.9 % | N/A |
| EQ-5D-5L (5 items; score range −0.594 to 1.000) | 0.7 (SD 0.2) | 2.5 % | 0.0 %/15.5 % |
| EQ-VAS (1 item; score range 0–100) | 65.2 (SD 18.9) | 0.8 % | 0.0 %/1.2 % |
| C-CAP2 (post-ablation) n = 437 | |||
| Q1–3b: symptom change (4 items; score range 4–16) | 8.0 (SD 3.3 %) | 5.5 % | 15.3 %/2.2 % |
| Q4: ablation-related complications (1 item; binary) | 24 % (Y); 70 % (N) | 6.2 % | N/A |
| Q7: expectations met or exceeded (1 item; binary) | 68 % (Y); 26 % (N) | 6.2 % | N/A |
| Q8: symptom severity index (15 items; score range 0–45) | 8.8 (SD 7.8) | 16.7 % | 8.8 %/0.0 % |
| Q9–10: frequency and duration (2 items; score range 0–8) | 2.6 (SD 2.6) | 3.2 % | 42.6 %/6.4 % |
| Q11: days impact (work/school) (1 item; score range 0–30) | 5.4 (SD 10.6) | 2.7 % (68.4 % N/Ab) | 69.8 %/12.7 % |
| Q12: days impact (social activities) (1 item; score range 0–30) | 5.7 (SD 9.6) | 4.3 % (47.6 % N/Ab) | 52.9 %/9.5 % |
| Q13: days impact (normal activities) (1 item; score range 0–30) | 5.2 (SD 9.1) | 5.3 % (45.3 % N/Ab) | 53.9 %/8.3 % |
| Q14a: GP visits in last 30 days (1 item) | 0.4 (SD 0.9) | 14.6 % | 75.1 %/0 % |
| Q14b: hospital visits in last 30 days (1 item) | 0.3 (SD 1.1) | 22.9 % | 81.6 %/0 % |
| Q15: impact on life (score range 0–30) | 7.2 (SD 7.5) | 9.6 % | 14.9 %/0.3 % |
| Q16: medication taken for arrhythmia (1 item; binary) | 63 % (Y); 35 % (N) | 1.6 % | N/A |
| Q18: medication intake compared with before procedure (1 item; 3 response options) | More = 11 %; same = 35 %; less = 17 % | 36.4 % | N/A |
| EQ-5D-5L (score range −0.594 to 1.000) | 0.8 (SD 0.2) | 2.5 % | 0.0 %/30.5 % |
| EQ-VAS (score range 0–100) | 72.6 (SD 20.1) | 1.1 % | 0.0 %/3.9 % |
aLowest/highest scale scores (of respondents)
bPercentage of patients who recorded a response of N/A