Figure 3
VFQ-25 scores in the diffractive bifocal and diffractive trifocal groups before/10 weeks after surgery. In the box-and-whisker plots, the bottom of the box indicates the first quartile, and the top of the box indicates the third quartile. The band across the box represents the median. To highlight suspected outliers, the upper whisker indicates the maximum or the third quartile + 1.5 × IQR, whichever is lower. The lower whisker indicates the minimum or the first quartile—1.5 × IQR, whichever is higher. Each parameter was adjusted by multiple linear regression with the explanatory variables in Table 1. The Wald test (two-sided) was applied to evaluate the significance of differences between the two groups, and the significance level was set to 0.003125 after Bonferroni’s correction. The asterisk * in this figure indicates a significant difference between the two groups satisfied with the significance level of p < 0.003125.
