Conversely, elevated levels of angiogenin (OR: 0.8269, 95% CI: 0.7104-0.9624, PIVW: 0.0141), CFH (OR: 0.7197, 95% CI: 0.5198-0.9966, PIVW: 0.0476), SHBG (OR: 0.9320, 95% CI: 0.8725-0.9955, PIVW: 0.0362), and CFHR1 (OR: 0.8534, 95% CI: 0.7505-0.9705, PIVW: 0.0157) were associated with a decreased risk of keratitis. This evidence concerns the gene SHBG and keratitis.