采用SPSS 22.0及Graphpad Prism8软件分析数据。所有参数经过Kolmogorov-Smirnov检验是否符合正态分布,符合正态分布的计量资料以均数±标准差( x ± s )表示,非正态分布的计量资料采用中位数(P25,P75)表示,等级资料用率(%)表示。正态分布数据总体差异采用单因素方差分析检验,进一步两两比较采用LSD检验(Least Significant Difference)。非正态分布数据或等级资料采用Kruskal-Wallis非参数检验,进一步两两比较采用Bonferroni检验,分析四种仪器测量结果的一致性。采用Bland-Altman分析及组内相关系数(intraclass correlation coefficient,ICC)对每两种仪器Kappa角测量结果之间一致性进行评估,同时计算出95%一致性界限(95%limits of agreement,95%LOA)作为一致性评价指标。单因素方差分析及非参数检验的检验水准:α=0.05,四种仪器两两间比较LSD检验的检验水准:α=0.008。P<0.05为差异有统计学意义。
(A) Consistency analysis of angle Kappa measured by iTrace and Pentacam HR. (B) Consistency analysis of measurement of angle Kappa by iTrace and Lenstar900. (C) Consistency analysis of measurement of angle Kappa by iTrace and IOLMaster700. (D) Consistency analysis of angle Kappa measurements by Pentacam HR and Lenstar900. (E) Consistency analysis of angle Kappa measurements by Pentacam HR and IOLMaster700. (F) Consistency analysis for measurement of angle Kappa by Lenstar900 and IOLMaster 700.
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