Quality of Mitral Valve Surgery Does Not Differ by Hospital Volume in New Jersey
Table 3
Baseline characteristics and comorbidities of patients undergoing mitral valve repair and replacement in New Jersey stratified by high- and low-volume centers within each procedure.
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
Baseline characteristics
Age median (IQR)
66 (57, 76)
66 (57, 74)
0.82
69 (58, 76)
67.5 (58, 75)
0.096
Female n (%)
20 (37.0)
51 (35.4)
0.83
570 (50.6)
627 (50.7)
0.98
Hispanic n (%)
25 (17.4)
0.01
116 (10.3)
180 (14.6)
0.002
Transfer into facility
11 (20.4)
13 (9.0)
0.09
280 (24.9)
194 (15.7)
<0.001
Socioeconomic status n (%)
0.68
<0.001
25th percentile
34 (23.6)
295 (26.2)
278 (30.6)
50th percentile
12 (22.2)
39 (27.1)
256 (22.7)
361 (29.2)
75th percentile
14 (25.9)
29 (20.1)
309 (27.4)
274 (22.2)
100th percentile
17 (31.5)
42 (29.1)
263 (23.4)
214 (17.3)
Comorbidities n (%)
Atrial fibrillation
22 (40.7)
55 (38.2)
0.74
528 (46.9)
564 (45.6)
0.54
Chronic ischemic heart disease
29 (53.7)
81 (56.3)
0.75
667 (59.2)
697 (56.4)
0.16
Chronic kidney disease
11 (20.4)
25 (17.4)
0.63
270 (24.0)
285 (23.1)
0.60
Chronic obstructive pulmonary disease
30 (20.8)
0.72
275 (24.4)
299 (24.2)
0.90
Conduction blocks
0.49
62 (5.5)
74 (6.0)
0.62
Diabetes mellitus
18 (33.3)
37 (25.7)
0.29
344 (30.6)
356 (28.8)
0.35
Heart failure
28 (51.9)
77 (53.5)
0.84
595 (52.8)
716 (57.9)
0.01
Hypertension
43 (79.6)
114 (79.2)
0.94
867 (77.0)
961 (77.8)
0.66
Infective endocarditis
0.22
127 (11.3)
158 (12.8)
0.26
Liver disease
1.000
42 (3.7)
74 (6.0)
0.01
Peripheral vascular disease
1.000
70 (6.2)
60 (4.9)
0.15
Stroke
0.47
34 (3.0)
32 (2.6)
0.53
total number ≤10, and exact values are removed for patient privacy.
