Table 1.
Baseline characteristics of the study population
| Variable | Nonagenarians (Age ≥ 90) (N=3773) | Others (Age < 90) (N=20252) | p-value |
|---|---|---|---|
| Age* | 92.0 (90.0–93.0) | 82.0 (76.0–86.0) | <0.001 |
| Femaley | 1953 (51.76) | 9976 (49.26) | 0.005 |
| STS PROMxx score* | 9.22 (6.73–13.25) | 6.34 (4.20–9.77) | <0.001 |
| NYHA yy Class I & IIy | 670 (17.76) | 3459 (17.08) | 0.347 |
| NYHA yy Class III & IVy | 3055 (80.97) | 16479 (81.37) | |
| LVEF{* | 58.00 (48.00–65.00) | 56.00 (45.00–63.00) | <0.001 |
| Prior CABGx, y | 693 (18.37) | 6873 (33.94) | <0.001 |
| Prior Other Cardiac Surgeryy | 150 (3.98) | 1477 (7.29) | <0.001 |
| Prior Aortic Valve Procedurey | 646 (17.12) | 3239 (15.99) | 0.086 |
| Permanent Pacemaker/ICDy | 817 (21.65) | 3209 (15.85) | <0.001 |
| Atrial fibrillationy | 1619 (42.91) | 8175 (40.37) | 0.004 |
| Prior Strokey | 352 (9.33) | 2587 (12.77) | <0.001 |
| Transient Ischemic Attacky | 394 (10.44) | 1719 (8.49) | <0.001 |
| Peripheral Arterial Diseasey | 970 (25.71) | 6606 (32.62) | <0.001 |
| Hypertensiony | 3266 (86.56) | 18077 (89.26) | <0.001 |
| Diabetes Mellitusy | 730 (19.35) | 8179 (40.39) | <0.001 |
| Insulin Dependent Diabetesy | 149 (20.41) | 3192 (39.03) | <0.001 |
| Moderate-Severe Chronic Lung Diseasey | 581 (15.40) | 6096 (30.10) | <0.001 |
| Prior MI#,y | 786 (20.83) | 5258 (25.96) | <0.001 |
| Five Meter Walk Test - Time (sec)* | 8.67 (6.67–11.33) | 8.00 (6.00–10.67) | <0.001 |
| KCCQ-12jj Overall Score* | 41.67 (23.96–59.38) | 37.50 (21.88–56.77) | <0.001 |
| BMIy (kg/m2)* | 24.67 (22.20–27.56) | 27.25 (23.88–31.77) | <0.001 |
| Currently on Dialysisy | 39 (1.03) | 945 (4.67) | <0.001 |
| Creatinine (mg/dL)* | 1.10 (0.90–1.40) | 1.10 (0.90–1.50) | 0.002 |
| Triple Vessel Diseasey | 786 (20.83) | 5709 (28.19) | <0.001 |
| Left Main Stenosis >= 50%y | 325 (8.61) | 2241 (11.07) | <0.001 |
| Moderate-Severe Aortic Insufficiencyy | 663 (17.57) | 4171 (20.60) | <0.001 |
*
Median with interquartile range
y
Number of patients and percentage
z
BMI = Body mass index
x
CABG = Coronary artery bypass grafting
jj
KCCQ-12 = 12-item Kansas City Cardiomyopathy Questionnaire
{
LVEF = Left ventricular ejection fraction
#
MI = Myocardial infarction
yy
NYHA = New York Heart Association
xx
STS PROM = STS Predicted Risk of Operative Mortality