Mediating effects of psychological factor on exercise tolerance and sleep quality in elderly patients after PCI surgery
Objective To investigate exercise tolerance,sleep quality and psychological factor in elderly patients with coronary heart disease after percutaneous coronary intervention(PCI),and further study the mediating effect of psychological factor on exercise tolerance and sleep quality.Methods A convenient sampling method was adopted to select 100 elderly pa-tients with coronary heart disease after PCI who underwent cardiopulmonary exercise test(CPET)in Department of Cardiolo-gy,Xinhua Hospital Affiliated to Medical College of Shanghai Jiaotong University from June 2022 to June 2023.A psychologi-cal scale was used to assess their psychological level,a general information questionnaire was used to investigate their general condition,the Pittsburgh Sleep Quality Inventory(PSQI)was used to assess their sleep quality,and the maximal oxygen up-take(VO2max)of CPET was used to assess their exercise tolerance.Results 96 subjects were included in this study.Their PSQI score was 8.00(6.25,9.00),indicating varying degrees of sleep problems.Their MAAS score was 65.00(60.25,70.25),which was medium to low.Their VO2max was(1203.28±368.11)mL/min,which was relatively low.There was no sta-tistically significant difference in VO2max,PSQI,MAAS,SDS and STAI among different groups of patients.VO2max was posi-tively correlated with MAAS,PSQI was negatively correlated with VO2max,MAAS,SDS and STAI was negatively correlated with PSQI.Further research on the correlation between patients'baseline status and psychological factor,sleep quality and exer-cise tolerance revealed a strong correlation between a history of myocardial infarction and females(P＜0.05).The mediating effects of psychological factor on exercise tolerance and sleep quality in elderly patients after PCI were analyzed,and it was found that sleep quality had a significant predictive effect on exercise tolerance(P＜0.05).After the inclusion of the psycho-logical factor-mindfulness of attention awareness,the prediction effect was still statistically significant(P＜0.05).Conclusion Sleep quality has a positive effect on exercise tolerance in elderly patients with coronary artery disease after PCI,and psycho-logical factor play a mediating role between exercise tolerance and sleep quality.
万方数据
维普
