Table 2.
Test/Questionnaire scores at each study time point
| Test | Group | Baseline | 3 Month | 1 Year | 3 Year | 6 Year |
|---|---|---|---|---|---|---|
| NSCC | N = 92 | n = 84 | n = 84 | n = 60 | n = 61 | |
| CABG | N = 220 | n = 170 | n = 174 | n = 102 | n = 136 | |
| Mean Mini-Mental Status Exam score a | NSCC | 28.0 (±2.0) | 28.4 (±1.8) | 28.5 (±1.5) | 28.3 (±1.7) | 28.0 (±2.4) |
| CABG | 27.6 (±2.3) | 28.1 (±2.1) | 28.0 (±2.2) | 28.5 (±1.5) | 27.7 (±2.4) | |
| Mini-Mental Status Exam score <24 | NSCC | 6.5% | 3.6% | 2.4% | 1.7% | 8.2% |
| CABG | 4.6% | 3.0% | 2.9% | 1.0% | 5.9% | |
| Mean Functional Status Score b | NSCC | 33.0 (±3.9) | 32.6 (±4.1) | 32.2 (±4.6) | 31.4 (±5.2) | 32.1 (±5.5) |
| CABG | 30.3 (±5.3) * | 32.1 (±4.5) | 32.2 (±4.7) | 31.5 (±5.1) | 30.4 (±6.0) | |
| Mean CES-D score c | NSCC | 8.8 (±7.6) | 8.1 (±7.0) | 7.7 (±7.5) | 6.9 (±6.4) | 9.0 (±8.9) |
| CABG | 13.2 (±9.8) * | 10.2 (±9.9) | 9.1 (±9.8) | 8.9 (±9.5) | 10.1 (±9.4) | |
| Depressed (CES-D >15) | NSCC | 15.2% | 10.7% | 16.7% | 11.9% | 14.8% |
| CABG | 32.4% * | 24.1% * | 17.3% | 11.8% | 16.8% | |
| (Yes/No) Subjective memory complaint | NSCC | - | 6.0% | 15.3% | 29.0% | 51.6% |
| CABG | 26.9% * | 36.0% * | 45.7% | 52.9% | ||
| Mean Lund questionnaire score d | NSCC | - | - | - | - | -2.84 (±2.4) |
| CABG | -2.47 (±2.2) | |||||
| Mean Likert scale score e | NSCC | - | - | - | - | 7.08 (±1.7) |
| CABG | 6.87 (±1.7) |
*
indicates statistically significant differences (p<0.01);
a
Mini-Mental Status Exam score maximum = 30 (9);
b
Higher scores equated with better physical functioning (maximum score = 36) (10);
c
Higher CES-D scores (Center for Epidemiological Studies of Depression) (8) equated with depressive symptoms;
d
Lund questionnaire – memory items (6);
e
on the likert scale we asked patients to rank their memory (as it is today), on a scale from 1-10, with 10 being the best.
CABG – includes both on- and off-pump coronary artery bypass patients; NSCC – nonsurgical cardiac comparison group