Data analysis was performed using SPSS software for Windows version 17.0 (SPSS Inc., Chicago, IL). Categorical data were analyzed using Chi-Square test; however, Fisher’s exact test was used in cases where more than 20% of the cells had expected cell values of less than 5 or if the expected value in any cell of the contingency table was less than 1. In case of continuous variables, normality of the data was checked using Kolmogorov–Smirnov test and quantile–quantile plots. For normally distributed scale data, independent-sample t test was used to compare the means between the two groups. All P-values were two-sided and were considered statistically significant when less than 0.05. The sample size was calculated using literature reported incidence of free-floating capsulotomies achieved with LenSx laser (average 88.4%)2 (link),18 (link)–20 (link) and Ziemer Z8 laser (average 98.7%)21 (link),22 (link). Using these reported values for the two lasers, sample size calculations were performed with two-sided alpha of 0.05 and 80% power which revealed a total sample size of 190 (95 in each group). Accordingly, we chose a sample size of 100 in each group.
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