Conversely, elevation in apoC-I (OR: 0.1501, 95% CI: 0.0237-0.9526, PIVW: 0.0433), DBH (OR: 0.6810, 95% CI: 0.5136-0.9030, PIVW: 0.0076), and SP-D (OR: 0.7514, 95% CI: 0.5724-0.9864, PIVW: 0.0395) was associated with a decreased risk of cerebral aneurysm. Here, APOC1 is linked to brain aneurysm.