Research Article
Quality of Mitral Valve Surgery Does Not Differ by Hospital Volume in New Jersey
Table 1
Baseline characteristics and comorbidities of patients undergoing mitral valve repair and replacement in New Jersey by high- and low-volume centers.
| | | Total population (N = 2,560) | High volume (N = 1,180) | Low volume (N = 1,380) | value |
| | Baseline characteristics | | Age median (IQR) | 68 (58, 76) | 69 (58,76) | 67 (58, 75) | 0.07 | | Female n (%) | 1,268 (49.5) | 590 (50.0) | 678 (49.1) | 0.65 | | Hispanic n (%) | 323 (12.6) | 118 (10.0) | 205 (14.9) | <0.001 | | Transfer into facility | 498 (19.5) | 291 (24.7) | 207 (15.0) | <0.001 | | Socioeconomic status n (%) | | | | <0.001 | | 25th percentile | 717 (28.0) | 305 (25.8) | 412 (29.9) | | | 50th percentile | 668 (26.1) | 268 (22.7) | 400 (29.0) | | | 75th percentile | 626 (24.5) | 323 (27.4) | 303 (22.0) | | | 100th percentile | 536 (20.9) | 280 (23.7) | 256 (18.6) | |
| | Comorbidities n (%) | | Atrial fibrillation | 1,169 (45.7) | 550 (46.6) | 619 (44.9) | 0.37 | | Chronic ischemic heart disease | 1,474 (57.6) | 696 (59.0) | 778 (56.4) | 0.18 | | Chronic kidney disease | 610 (23.8) | 286 (24.2) | 324 (23.5) | 0.65 | | Chronic obstructive pulmonary disease | 592 (23.1) | 282 (23.9) | 310 (22.5) | 0.39 | | Conduction blocks | 147 (5.7) | 66 (5.6) | 81 (5.9) | 0.76 | | Diabetes mellitus | 755 (29.5) | 362 (30.7) | 393 (28.5) | 0.22 | | Heart failure | 1,416 (55.3) | 623 (52.8) | 793 (57.5) | 0.02 | | Hypertension | 1,985 (77.5) | 910 (77.1) | 1,075 (77.9) | 0.64 | | Infective endocarditis | 293 (11.4) | 131 (11.1) | 162 (11.7) | 0.61 | | Liver disease | 121 (4.7) | 43 (3.6) | 78 (5.7) | 0.02 | | Peripheral vascular disease | 137 (5.4) | 72 (6.1) | 65 (4.7) | 0.12 | | Stroke | 75 (2.9) | 35 (3.0) | 33 (2.4) | 0.37 |
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