Table 1. Patient demographics and institution characteristics of the female and male patients who received AAD surgery before propensity score matching.
| Type A open | Type B stent | |||||||
|---|---|---|---|---|---|---|---|---|
| Variable | Female (n = 1,286) | Male (n = 2,883) | P | STD | Female (n = 124) | Male (n = 549) | P | STD |
| Age (years) | 65.1 ± 12.6 | 56.9 ± 13.1 | <0.001 | 0.64 | 66.6 ± 11.8 | 63.2 ± 14.3 | 0.015 | 0.26 |
| Monthly income, USD | <0.001 | 0.027 | ||||||
| 0–596 | 461 (35.8) | 886 (30.7) | 0.11 | 36 (29.0) | 202 (36.8) | -0.17 | ||
| 610–760 | 486 (37.8) | 839 (29.1) | 0.18 | 48 (38.7) | 147 (26.8) | 0.26 | ||
| > 800 | 339 (26.4) | 1,158 (40.2) | -0.30 | 40 (32.3) | 200 (36.4) | -0.09 | ||
| Urbanization level | <0.001 | 0.013 | ||||||
| Low | 181 (14.1) | 294 (10.2) | 0.12 | 17 (13.7) | 41 (7.5) | 0.20 | ||
| Moderate | 395 (30.7) | 834 (28.9) | 0.04 | 40 (32.3) | 150 (27.3) | 0.11 | ||
| High | 359 (27.9) | 953 (33.1) | -0.11 | 41 (33.1) | 173 (31.5) | 0.03 | ||
| Very High | 351 (27.3) | 802 (27.8) | -0.01 | 26 (21.0) | 185 (33.7) | -0.29 | ||
| Surgical year | 0.670 | 0.069 | ||||||
| Before 2007 | 362 (28.1) | 833 (28.9) | -0.02 | 5 (4.0) | 41 (7.5) | -0.15 | ||
| 2008–2010 | 425 (33.0) | 920 (31.9) | 0.02 | 18 (14.5) | 112 (20.4) | -0.16 | ||
| 2011–2013 | 499 (38.8) | 1,130 (39.2) | -0.01 | 101 (81.5) | 396 (72.1) | 0.22 | ||
| Hospital level | 0.771 | 0.338 | ||||||
| Medical center (teaching hospital) | 989 (76.9) | 2,229 (77.3) | -0.01 | 109 (87.9) | 464 (84.5) | 0.10 | ||
| Regional / district hospital | 297 (23.1) | 654 (22.7) | 0.01 | 15 (12.1) | 85 (15.5) | -0.10 | ||
| Previous cardiac surgery | 41 (3.2) | 143 (5.0) | 0.010 | -0.09 | 7 (5.6) | 57 (10.4) | 0.104 | -0.18 |
| Cumulative volume of aortic dissection surgery between 2004 and 2013 | 0.385 | 0.106 | ||||||
| 1st quartile (1–132) | 375 (29.2) | 767 (26.6) | 0.06 | 23 (18.5) | 102 (18.6) | <0.01 | ||
| 2nd quartile (133–216) | 305 (23.7) | 722 (25.0) | -0.03 | 34 (27.4) | 102 (18.6) | 0.21 | ||
| 3rd quartile (220–345) | 319 (24.8) | 737 (25.6) | -0.02 | 19 (15.3) | 78 (14.2) | 0.03 | ||
| 4th quartile (355–687) | 287 (22.3) | 657 (22.8) | -0.01 | 48 (38.7) | 267 (48.6) | -0.20 | ||
| Follow-up (years) | 2.8 ± 2.7 | 2.8 ± 2.7 | 0.772 | -0.01 | 1.4 ± 1.6 | 1.8 ± 1.8 | 0.012 | -0.26 |
AAD, acute aortic dissection; STD, standardized difference; USD, US dollar.
Value are given as number (%) or mean ± standard deviation.