Alizadeh Leila, Nikjooy Afsaneh, Vasaghi-Gharamaleki Behnoosh, Salehi Reza, Amiri Ali, Ghomashchi Hamed, Salehi Saman, Rezaie Khaled
Department of Physiotherapy, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran.
Department of Basic Sciences in Rehabilitation, School of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran.
Med J Islam Repub Iran. 2022 Jun 20;36:66. doi: 10.47176/mjiri.36.66. eCollection 2022.
So far, there is much less information about the effects of urinary incontinence on postural control. Therefore the aim of this study is to investigate the differences in postural control using linear and non-linear analyses of the center of pressure (COP) time-series in anteroposterior (AP) and mediolateral (ML) directions between females with and without stress urinary incontinence (SUI). This case-control study included 22 continent females and 22 SUI females. In this study, static postural control during four different postural tasks was evaluated using a force plate. All participants performed separate 60-sec standing trials with eyes open in the empty bladder and full bladder conditions. Mean, range, velocity, area circle of COP displacements, and approximate entropy (ApEn) of COP time-series were calculated from the 60-sec standing trials for all participants. The independent sample t-test was also used to compare COP variables between the two groups and paired sample t-test was used to assess changes between the full bladder and empty bladder conditions within each group. The effect size of Cohen's d was used to assess the magnitude of the differences between the two groups. The findings revealed a significant group × task interaction for the mean of ML displacement and ApEn of COP. SUI females showed more AP displacement range in the full bladder (pvalue= 0.020, effect size=0.74) and a higher velocity (empty bladder: =0.040, effect size=0.63) (full bladder: =0.020, effect size=0.75) than the continent group. Generally, the SUI females had lower ApEn than the continent females, although the differences were not significant. While the variables of COP were unaffected by bladder fullness in the continent group, the SUI group in full bladder condition experienced more AP range (=0.030), and area circle (=0.007) of COP sway in quiet standing. These results provide more support for the hypothesis that postural control can be impaired following SUI, although future investigations on this topic are recommended.
到目前为止，关于尿失禁对姿势控制影响的信息要少得多。因此，本研究的目的是通过对压力中心（COP）时间序列在前后（AP）和内外侧（ML）方向上进行线性和非线性分析，来研究有无压力性尿失禁（SUI）的女性在姿势控制方面的差异。这项病例对照研究包括22名尿失禁女性和22名压力性尿失禁女性。在本研究中，使用测力板评估了四种不同姿势任务期间的静态姿势控制。所有参与者在膀胱空虚和充盈状态下分别进行60秒睁眼站立试验。从所有参与者的60秒站立试验中计算出COP位移的平均值、范围、速度、面积圆以及COP时间序列的近似熵（ApEn）。还使用独立样本t检验比较两组之间的COP变量，并使用配对样本t检验评估每组内膀胱充盈和空虚状态之间的变化。Cohen's d效应量用于评估两组之间差异的大小。研究结果显示，COP的ML位移平均值和ApEn存在显著的组×任务交互作用。与尿失禁女性相比，压力性尿失禁女性在膀胱充盈时AP位移范围更大（p值 = 0.020，效应量 = 0.74），速度更高（膀胱空虚时：= 0.040，效应量 = 0.63）（膀胱充盈时：= 0.020，效应量 = 0.75）。总体而言，压力性尿失禁女性的ApEn低于尿失禁女性，尽管差异不显著。虽然COP变量在尿失禁组中不受膀胱充盈的影响，但在膀胱充盈状态下，压力性尿失禁组在安静站立时COP摆动的AP范围（= 0.030）和面积圆（= 0.007）更大。这些结果为压力性尿失禁后姿势控制可能受损的假设提供了更多支持，尽管建议对该主题进行进一步研究。
