APOA1 and triple-A syndrome: As shown in Table 4, female AAA patients had a higher rupture rate than male patients, but this difference did not reach statistical difference (12.5% vs. 9.0%, P = 0.428); compared to male patients, female patients were older (76.21 ± 11.42 vs. 72.69 ± 9.99, P = 0.027) and had higher levels of HDL-C (1.26 ± 0.44 vs. 1.10 ± 0.34, P = 0.020), TC (4.91 ± 1.52 vs. 4.27 ± 1.17, P = 0.001) and ApoA1 (1.06 ± 0.27 vs. 0.93 ± 0.22, P = 0.004).