Table 2.
CCTI Scores for the Total Sample and by Midpoint Age Ranges [mean, (SD)].
| Variable | Score Range | Total Sample (n=308) | MP 30 (n=45) | MP 35 (n=36) | MP 40 (n=40) | MP 45 (n=51) | MP 55 (n=63) | MP 60 (n=94) | MP 65 (n=94) | MP 70 (n=102) | MP 75 (n=80) | MP 80 (n=49) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Vig A: Reasoning |
0-6 | 4.6 (1.6) |
4.6 (1.5) |
4.8 (1.5) |
4.5 (1.7) |
4.6 (1.7) |
5.2 (1.2) |
4.8 (1.5) |
4.4 (1.6) |
4.5 (1.6) |
4.4 (1.7) |
4.3 (1.7) |
| Vig A: Understanding |
0-64 | 29.7 (5.4) |
30.3 (5.3) |
30.2 (4.7) |
29.0 (5.3) |
28.5 (4.9) |
29.9 (4.5) |
30.1 (4.6) |
29.9 (4.9) |
29.6 (5.1) |
28.9 (5.5) |
28.1 (6.2) |
| Vig A Total | 0-77 | 41.2 (6.1) |
41.7 (5.9) |
41.7 (5.6) |
40.4 (6.4) |
40.0 (5.9) |
42.0 (5.0) |
41.8 (5.4) |
41.2 (5.8) |
40.8 (6.1) |
40.0 (6.3) |
40.0 (7.3) |
| Vig B: Reasoning |
0-6 | 4.2 (1.7) |
4.2 (1.5) |
4.2 (1.6) |
4.1 (1.6) |
4.4 (1.6) |
4.7 (1.6) |
4.5 (1.6) |
4.2 (1.7) |
4.1 (1.7) |
4.0 (1.7) |
3.6 (1.8) |
| Vig B: Understanding |
0-70 | 33.7 (6.3) |
34.3 (5.3) |
33.6 (5.4) |
32.7 (5.3) |
33.0 (5.8) |
34.4 (5.4) |
34.5 (5.0) |
34.2 (5.5) |
32.6 (5.3) |
31.8 (4.7) |
31.4 (4.9) |
| Vig B Total | 0-82 | 43.7 (7.3) |
44.2 (6.1) |
43.4 (6.4) |
42.4 (6.3) |
43.1 (7.0) |
44.5 (6.5) |
44.7 (5.9) |
44.3 (6.1) |
42.5 (5.6) |
41.6 (5.7) |
40.6 (6.4) |
| Reasoning Total |
0-12 | 8.7 (2.6) |
8.8 (2.4) |
8.8 (2.3) |
8.4 (2.6) |
8.7 (2.7) |
9.8 (2.2) |
9.3 (2.5) |
8.6 (2.7) |
8.6 (2.5) |
8.4 (2.7) |
7.8 (2.7) |
| Understanding Total |
134 | 63.2 (10.3) |
64.7 (9.1 |
63.8 (9.0) |
61.6 (9.3) |
61.1 (9.4 |
64.2 (7.5) |
64.6 (7.9) |
64.2 (9.3) |
61.9 (9.4) |
60.6 (9.0) |
60.3 (9.5) |
| CCTI Total | 0-159 | 84.8 (11.9) |
85.8 (10.7) |
85.1 (10.9) |
82.4 (11.6) |
82.5 (11.7) |
86.2 (8.9) |
86.4 (9.3) |
85.5 (10.8) |
82.9 (10.5) |
81.5 (10.6) |
80.6 (12.1) |
Note. MP=midpoint age range, CCTI=Capacity to Consent to Treatment Instrument, SD=standard deviation, Vig A=Vignette A, Vig B=Vignette B.