Abstract
Objective To investigate the serum levels of vitamin B12 and folic acid (FA) of exudative age-related macular degeneration (AMD). Methods A total of 84 patients with exudative AMD(AMD group)and 78 patients with non-exudative AMD (control group) diagnosed at Xijing Hospital between June 2008 and September 2009 were assessed in this study. Serum vitamin B12 and FA levels were measured by chemiluminescence immunoassay. The statistical information of epidemiology and risk factors exposure histories were collected and compared. Results AMD group had significantly lower serum vitamin B12 levels[(247.51±93. 92) ng/ml]compared with the control group [(312. 52±143.08) ng/ml], the difference was statistical significance (t=5. 013, P<0.001). Serum FA levels in AMD group [(5. 64±3.72) ng/ml]were slightly lower than the control group [( 10.14±4. 48) ng/ml], the difference was not statistical significance (t=0. 780, P= 0. 437). Conclusion People with lower serum vitamin B12 have higher risk of exudative AMD. Low levels of serum vitamin B12 may relate with the occurrence of exudative AMD. Key words: Macular degeneration/etiology; Vitamin B12/lack; Folic acid/lack
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