Correlation between baseline values of MPOD and serum lutein concentrations and changes in MPOD and serum lutein concentration at 3 months.

Rate of MPOD change at 3 months = (MPOD at 3 months—MPOD at baseline)/MPOD at baseline. Rate of serum lutein concentration change at 3 months = (serum lutein concentration at 3 months—serum lutein concentration at baseline)/serum lutein concentration at baseline. The correlation coefficient (r) and p values are calculated by Spearman's rank correlation coefficient. The * indicates pCorrelation between baseline values of MPOD and serum lutein concentrations and changes in MPOD and serum lutein concentration at 3 months.

3个月时黄斑色素光密度（MPOD）变化率 =（3个月时MPOD - 基线时MPOD）/基线时MPOD。3个月时血清叶黄素浓度变化率 =（3个月时血清叶黄素浓度 - 基线时血清叶黄素浓度）/基线时血清叶黄素浓度。采用斯皮尔曼等级相关系数计算相关系数（r）与p值。*号代表MPOD与血清叶黄素浓度基线值，以及3个月时MPOD和血清叶黄素浓度变化之间的相关系数对应的p值。