Table 1.
Demographical, medical and psychological characteristics at baseline of patients receiving Standard Medical Care (SMC; 44), Supportive Intervention (SUPPORT; 39) or Expectation Manipulation Intervention (EXPECT; 39)
| SMC | SUPPORT | EXPECT | Test statistic | |
|---|---|---|---|---|
| Age in years, median (SD) | 67.07 (8.9) | 64.62 (8.1) | 65.76 (7.8) | F(2, 112) = 0.856; P = 0.427 |
| Sex, male, n (%) | 36 (87.8) | 30 (81) | 32 (86.5) | χ 2 (2) = 0.768; P = 0.681 |
| Education, high school, n (%) (MD = 1) | 7 (17.1) | 10 (27) | 10 (27) | χ 2 (2) = 1.304; P = 0.521 |
| Marital status, married, n (%) (MD = 1) | 33 (80.5) | 34 (91.9) | 31 (83.8) | χ 2 (2) = 2.097; P = 0.350 |
| BMI, median (SD) (MD = 3) | 29.67 (5.2) | 29.5 (6.6) | 29.03 (5.01) | F(2, 109) = 0.13; P = 0.876 |
| Smoking status, n (%) | 6 (14.6) | 2 (5.4) | 6 (16.2) | χ 2 (2) = 2.383; P = 0.304 |
| EuroSCORE II, median (SD) (MD = 11)a | 1.53 (0.8) | 1.47 (0.8) | 1.25 (0.8) | F(2, 101) = 2.30; P = 0.105 |
| NYHA, n (%) (MD = 10) | χ 2 (6) = 4.644; P = 0.590 | |||
| I | 1 (2.4) | 1 (2.7) | 0 (0) | |
| II | 9 (22.0) | 11 (29.7) | 12 (32.4) | |
| III | 28 (68.3) | 20 (54.1) | 17 (45.9) | |
| IV | 1 (2.4) | 2 (5.4) | 3 (8.1) | |
| LVEF, n (%) (MD = 9) | χ 2 (4) = 9.944; P = 0.041 | |||
| ≥ 50 | 23 (48.8) | 19 (51.4) | 30 (78.4) | |
| 49–30 | 13 (31.7) | 13 (35.1) | 4 (10.8) | |
| < 30 | 2 (4.9) | 2 (5.4) | 0 (0) | |
| Previous myocardial infarction, n (%) (MD = 5) | 9 (23.1) | 6 (17.1) | 6 (16.7) | χ 2 (4) = 2.398; P = 0.663 |
| Combined surgery, n (%) | 6 (14.6) | 6 (16.2) | 3 (8.1) | χ 2 (2) = 1.214; P = 0.545 |
| Current mental disorder, n (%) (MD = 1) | 4 (9.8) | 5 (13.5) | 8 (21.6) | χ 2 (2) = 2.130; P = 0.345 |
| Anxiety, median (SD) (MD = 7)b | 4.03 (3.0) | 4.55 (3.2) | 5.17 (5.0) | F(2, 105) = 0.838; P = 0.435 |
| Depression, median (SD) (MD = 8)c | 4.59 (3.1) | 4.0 (3.1) | 5.11 (4.0) | F(2, 104) = 0.894; P = 0.412 |
| Disability, median (SD) (MD = 3)d | 22.78 (13.8) | 22.14 (15.3) | 25.89 (15.0) | F(2, 110) = 0.683; P = 0.507 |
| Mental quality of life, median (SD) (MD = 7)e | 48.96 (9.9) | 51.6 (8.7) | 47.98 (12.8) | F(2, 105) = 1.081; P = 0.343 |
| Physical quality of life, median (SD) (MD = 5)f | 40.26 (10.5) | 39.55 (11.0) | 37.15 (9.2) | F(2, 107) = 0.920; P = 0.402 |
| gPhysical activity, median (SD) (MD = 20) | 2668.4 (2146.2) | 2635.5 (2806) | 2433.6 (3339.5) | F(2, 92) = 0.067; P = 0.935 |
| hCardiac anxiety, median (SD) (MD = 4) | 2.48 (0.6) | 2.68 (0.6) | 2.67 (0.7) | F(2, 108) = 1.260; P = 0.288 |
a EuroSCORE European System for Cardiac Operative Risk Evaluation; untransformed data is displayed to facilitate interpretation; statistical analyses are based on log-transformed data
bAnxiety (Hamilton Anxiety and Depression Scale; HADS) range = 0–21
cDepression (HADS) range = 0–21
dDisability (Pain Disability Index) range = 0–70
eMental quality of life (Mental component of the Short-Form Health Survey (SF-12))
fPhysical quality of life (Physical component of the SF-12)
gPhysical activity (International Physical Activity Questionnaire, weighted estimate of total physical activity per week
hCardiac Anxiety Questionnaire, range = 0–4
SMC Standard Medical Care, SUPPORT Supportive Intervention, EXPECT Expectation Manipulation Intervention, BMI body mass index, NYHA New York Heart Association functional classification, LVEF left ventricular ejection fraction, MD missing data