美国旧金山加利福尼亚大学医学院学生Sophia Y. Wang报道，全国健康和营养调查(NHANES)发现，钙和铁(包括饮食和补充摄入)的总摄入量越高，罹患青光眼的风险越高，然而，钙和铁的饮食摄入量高，罹患青光眼的风险反而更低。Sophia Y. Wang认为：“我们认为饮食而非补充摄入的铁和钙其吸收形式或生物利用度可能不同。”

　　PO126

　　Glaucoma and Intake of the Oxidants Calcium and Iron in a U.S. Population Sample

　　Purpose: To investigate the relationship between glaucoma and total intake of calcium and iron.

　　Methods: This cross-sectional study included 3598 participants in the 2007-2008 National Health and Nutrition Examination Survey, age ≥40 years, who self-reported glaucoma status. Usual total intakes of calcium and iron were modeled from two 24-hour recall interviews.

　　Results: Adjusted odds of glaucoma increased with higher quintile (Q) intakes of calcium (P-trend < .0001; Q3: OR 1.58, 95% CI, 1.32-1.89; Q4: 1.21, 1.03-1.43) and iron (P-trend < .0001; Q4: 1.58, 1.36-1.83; Q5: 2.95, 2.52-3.45) compared with the lowest quintile intake.

　　Conclusion: Higher total intake of calcium and iron may be associated with increased presence of glaucoma.