Table 2.
Characteristics of treatment center treating 1-20 year-old patients in the 12 months around the AVR
| Patients with center data | Total N=823 | R-AVR N=389 (47.3%) | M-AVR N=342 (41.6%) | T-AVR N=92 (11.2%) | p-valuea |
|---|---|---|---|---|---|
| Unique centers - N | 43 | 37 | 40 | 26 | |
| Case volume per 12 mos - Median (IQR) | 204 (145-29) | 204 (145-304) | 206 (145-274) | 196 (136-287) | 0.55 |
| Small (10-99) | 87 (10.6)b | 35 (9.0) | 41 (12.0) | 11 (12.0) | |
| Medium (100-199) | 314 (38.2) | 157 (40.4) | 120 (35.1) | 37 (40.2) | 0.46 |
| Large (≥ 200) | 422 (51.3) | 197 (50.6) | 181 (52.9) | 44 (47.8) | |
| % of high-risk operations – Median (IQR) | 9.8(7.7-12.0) | 10.3 (8.4-12.3) | 9.2 (7.3-11.2) | 10.3 (8.0-12.4) | <0.01 |
| <9.4% | 377 (45.8) | 159 (40.1) | 182 (53.2) | 36 (39.1) | <0.01 |
| ≥9.4% | 446 (54.2) | 230 (59.1) | 160 (46.8) | 56 (60.9) | |
| High risk postoperative mortality - Median (IQR) | 2.4(1.4 – 3.5) | 2.3 (1.3 – 3.5) | 2.5 (1.5 – 3.7) | 2.2 (1.1 – 3.4) | 0.11 |
| Cases in centers <3.8% mortality | 646 (78.5) | 311 (80.0) | 261 (76.3) | 74 (80.4) | 0.44 |
| Cases in centers ≥3.8% mortality | 177 (21.5) | 78 (20.1) | 81 (23.7) | 18 (19.6) |
a
p-values comparing the distribution of categorical characteristics across valve types were estimated using chi-squared and the Kruskal-Wallis test was used for continuous factors since normality was not assumed
b
Numbers indicate the count (column percent) unless otherwise specified