采用IBM-SPSS 26.0统计学软件分析数据。对本研究参数值均进行描述性检验统计和采用Kolmogorov-Smirnov检验正态性;应用成对样本 t 检验或 Wilcoxon 符号秩检验来分析 SMILE术前后各项参数的变化;单因素方差分析及LSD-T检验事后多重分析不同角膜厚度组的差异性;由于观察参数变量之间存在多重共线性且样本量小,通过预测误差均方根(root mean square error of prediction,RMSEP)确认主成分数量后进行偏最小二乘回归(partial least square linear regression,PLSLR)和Spearman相关性有效性检验分析相关性。以P < 0.05为差异有统计学意义。
术前 bIOP 、 DA 2 ratio 、 I R 、 ARTh 、SP-A 1和 CBI 与眼压均有相关性 ( P < 0.05) ,DA2ratio、I R、ARTh、SP-A 1和CBI与CCT显著相关( P < 0.05),bIOP和SSI与CCT无相关性(P>0.05),SSI与眼压无相关性(P>0.05);DA2ratio与CV 3mm、CV 5mm呈负相关( r =?0.512、?0.362,P < 0.05) , 与 C V 10mm呈正相关 ( r = 0.679 ,P < 0.05) ; ARTh 与 CV 3mm、 CV 5mm呈正相关( r =0.324、0.241,P <0.05),与C V10mm呈负相关
2.4.2 SMILE 术后 3 个月角膜生物力学参数与 CV等形态及结构参数的相关性
SMILE术后3个月bIOP、DA2ratio、IR、ARTh、SP-A1、CBI和SSI与眼压均有相关性(P <0.05),DA2ratio、IR、ARTh、SP-A1和CBI与CCT显著相关(P<0.05),SSI与CCT无相关性(P>0.05);ARTh与CV3mm、CV5mm呈正相关(r=0.376、0.203,P<0.05),与CV10mm呈负相关(r=?0.417,P<0.05);CBI与CV3mm呈负相关( r =?0.214,P <0.05)、C V10mm呈正相关(r=0.290,P<0.05,表8)。
表3 不同厚度组的不同区域CV比较
Table 3 Comparison of CV in difffferent areas of difffferent thickness
表4 SMILE术前和术后3个月角膜生物力学新型整合参数的变化
Table 4 Changes in corneal biomechanical parameters before and 3 months after SMILE
表5 不同厚度组SMILE术前和术后3个月角膜生物力学新型整合参数的比较
Table 5 Comparison of new corneal biomechanical integration parameters for SMILE of difffferent thickness groups before and 3
months after SMILE
表6 16例低角膜厚度组术前角膜生物力学参数和16例高角膜厚度组术后的角膜生物力学参数对比
Table 6 Comparison of corneal biomechanical parameters between 16 patients with low corneal thickness before SMILE and 16
patients with high corneal thickness after SMILE
表7 SMILE术前角膜生物力学参数与术前角膜体积等形态及结构参数的相关性
Table 7 Correlation between corneal biomechanical parameters before SMILE and preoperative morphological and structural
parameters before SMILE
表8 SMILE术后3个月角膜生物力学参数与形态及结构参数的相关性
Table 8 Correlation of corneal biomechanical parameters with morphological and structural parameters 3 months after SMILE
表9 SMILE术后3个月角膜生物力学参数变化量与形态及结构参数变化量的相关性
Table 9 Correlation of changes of corneal biomechanical parameters with changes of morphological and structural parameters 3
months after SMILE
2.4.3 SMILE 术后角膜生物力学参数变化量与 CV等形态及结构参数变化量的相关性
SMILE手术前后bIOP、DA2ratio、IR、SP-A1和 CBI 变化量均与眼压变化量呈显著相关 ( 均P<0.05),DA2ratio、IR、ARTh、SP-A1和CBI变化量与CCT变化量显著相关(均P <0.05);ARTh变化量与CV3mm、CV5mm变化量呈正相关(r =0.392、0.453 , P < 0.05) , 与 CV10mm变化量呈负相关(r=?1.047,P<0.05);bIOP变化量与CV3mm、CV5mm变化量呈负相关(r=?0.272、?0.311,P<0.05),与CV10mm变化量呈正相关(r=0.822,P<0.05);IR变化量与CV10mm变化量呈负相关(r=?0.487,P<0.05);SP-A1变化量与C V5mm变化量呈负相关(r=?0.229,P <0.05),与CV10mm变化量呈正相关( r =?0.549,P<0.05);CBI变化量与CV3mm、CV5mm变化量负相关(r=?0.224、?0.263,P<0.05),与CV10mm变化量呈正相关(r=0.468,P<0.05,表9)。
1、佛山市科技创新项目医学类科技攻关项目 (2020001005825)。This work was supported by the Foshan Science and Technology Innovation Project Medical Science and Technology Project, China (2020001005825)
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