Statistical analysis was conducted with SPSS for Windows (v. 20.0, SPSS Inc.). Numerical variables were presented as mean ± standard deviation and Student’s t test was used to compare differences between groups. Categorical variables were described by frequencies and percentages and tested by χ2 test. Spearman correlation analysis was used to investigate the relationship between IOL tilt and decentration and internal astigmatism and HOAs. Two-sided P < 0.05 was considered as statistically significant in all analyses.
Spss for windows v
Manufactured by IBM
SPSS for Windows (v.) is a software application for statistical analysis. It provides a comprehensive set of tools for data management, analysis, and reporting. The software is designed to handle a wide range of data types and offers a user-friendly interface for conducting statistical tests, generating graphs, and producing reports.
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Lab products found in correlation
3 protocols using spss for windows v
1
Assessing IOL Tilt and Astigmatism
2
Statistical Analysis of Experimental Data
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Data analysis was performed using SPSS for Windows (v.16.0; SPSS Inc.). Data are expressed as mean ± standard error of the mean. Differences between the means of the groups were assessed by one-way ANOVA followed by least significant difference tests (in cases of equal variance) or Dunnett's test (when there was heterogeneity in the variance) for post hoc comparisons. P<0.05 was considered to indicate a statistically significant difference.
3
Comprehensive Statistical Analysis of Experimental Data
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All experiments were performed in triplicate and results were expressed as means ± standard deviation. For statistical analysis, the following tests were used: Mann–Whitney, Kruskal–Wallis and the test for correlation coefficient by SPSS (Chicago, IL) statistical software package (SPSS for Windows, v. 13, 2004). Coefficient of correlation was tested at 0.05 and 0.01 level of significance.
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