Spss program statistical package v13

Manufactured by IBM

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SPSS, version 13.0, is a comprehensive statistical analysis software package. It provides a variety of tools for data management, analysis, and presentation. The core function of SPSS is to enable users to perform statistical analysis on data, including descriptive statistics, hypothesis testing, regression, and more.

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2 protocols using spss program statistical package v13

Comparing Corneal Epithelial Thickness by AS-OCT and IVCM

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Data were statistically analyzed by SPSS program statistical package V13.0 (SPSS Inc, Chicago, IL, USA). Basic descriptive statistics were calculated on all data gathered, and values were reported as mean ± SD. Difference (bias) in epithelial thickness values for each area was calculated as AS-OCT minus IVCM. A negative difference indicated a thinner value on AS-OCT compared to IVCM. Normality of data was determined first using Shapiro-Wilk Test. A paired t test was used to analyze the data conforming to Gaussian distribution, and Wilcoxon Signed Ranks Test was applied for data with nonnormal distribution. The agreement between both devices was determined using Bland–Altman analysis, and was verified by cross classification and interclass correlation coefficient (ICC) analysis.. The mean and 95 % limits of agreement(LoA) (1.96 × standard deviation) of the bias were calculated for central cornea and each quadrant. A P value less than 0.05 was considered as statistically significant.

Le Q., Chen Y., Yang Y, & Xu J. (2016). Measurement of corneal and limbal epithelial thickness by anterior segment optical coherence tomography and in vivo confocal microscopy. BMC Ophthalmology, 16, 163.

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Prevalence of Peripheral Optic Verge in Eyes

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Data were analyzed by the SPSS program statistical package V13.0 (SPSS
Inc, Chicago, IL, USA). Basic descriptive statistics were calculated for all
data, and values were reported as the mean ± standard deviation (SD).
Depending on the data distribution, comparisons between groups were conducted
with Student’s t test, Mann-Whitney U test, or ANOVA.
The incidence of POV presence among different quadrants was compared with the
Chi-square test. Logistic regression analysis was performed to explore the
relationship between LET and the presence of POV. A P value less than 0.05
indicated statistical significance.

Le Q., Yang Y., Deng S.X, & Xu J. (2016). Correlation between the existence of the palisades of Vogt and limbal epithelial thickness in limbal stem cell deficiency. Clinical & experimental ophthalmology, 45(3), 224-231.

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