Quality of Mitral Valve Surgery Does Not Differ by Hospital Volume in New Jersey
Table 4
Outcomes of patients undergoing mitral valve repair and replacement in New Jersey as a whole population and stratified by high- and low-volume centers.
Total population (N = 2,560)
Mitral valve repair (N = 198)
Mitral valve replacement (N = 2,362)
High volume (n = 54)
Low volume (n = 144)
value
High volume (n = 1,126)
Low volume (n = 1,236)
value
In hospital mortality n (%)
156 (6.1%)
1.000
82 (7.3%)
65 (5.3%)
0.042
7-day readmission n (%)
109 (4.3%)
0.669
28 (2.5%)
75 (6.1%)
<0.001
Length of stay median (IQR)
12 (8, 19)
11 (7, 18)
8 (5, 13)
0.036
13 (8, 20)
12 (7, 18)
<0.001
Postoperative complications n (%)
Atrial fibrillation
628 (24.5%)
31 (21.5%)
0.698
280 (24.9%)
307 (24.8%)
0.987
Atrioventricular block
378 (14.8%)
1.000
169 (15.0%)
198 (16.0%)
0.498
Heart failure
279 (10.9%)
14 (9.7%)
0.73
148 (12.7%)
121 (9.8%)
0.025
Renal failure
763 (29.8%)
32 (22.2%)
0.697
324 (28.8%)
297 (24.0%)
0.078
Stroke
75 (2.9%)
0.472
26 (2.3%)
46 (3.7%)
0.046
IQR: interquartile range. total number ≤10, and exact values are removed for patient privacy.
