ABSTRACT
【Objective】 To revise the Social Connectedness Scale-Revised （SCS-R） so as to explore the factor structure of SCS-R in the context of Chinese culture and test its reliability and validity. 【Methods】 Totally 900 college students were asked to complete the Chinese version of the Social Connectedness， and 850 valid questionnaires were collected. In addition， the Distress Disclosure scale （DDI） and UCLA Loneliness Scale were used as the criteria. One month later， 100 students were randomly selected for retest. 【Results】 ① The results of exploratory factor analysis showed that one factor with more than one eigenvalue was selected， and the cumulative variance explained was 62.44%. ② Confirmatory factor analysis showed that the data fit well （χ2=33.438， df=14， χ2/df=2.388， RMSEA=0.04， CFI=0.996， TLI=0.991）. ③ The Chinese version of the social connectedness scale is a one-dimensional scale. Its internal consistency coefficient is 0.916 and test-retest reliability is 0.845. ④ Social connectedness is significantly positively correlated with distress disclosure and negatively correlated with loneliness， indicating that the scale has good criterion-related validity. 【Conclusion】 The Chinese version of the social connectedness scale has satisfactory reliability and validity， and has cross-cultural adaptability.
ABSTRACT
<p><b>OBJECTIVE</b>To explore the relationship between fragmented QRS complexes (fQRS) and imperfect ST-segment resolution in ST elevation myocardial infarction (STEMI) patients undergoing primary percutaneous coronary intervention (p-PCI).</p><p><b>METHODS</b>This study included 227 consecutive patients with STEMI who underwent p-PCI. They were divided into two groups: ECG with fQRS (n = 142) and without fQRS (n = 85). Baseline clinical characteristics,Gensini score, coronary angiography features and the rate of ST-segment resolution were compared between the two groups.</p><p><b>RESULTS</b>(1) Patients with fQRS of ECG had higher cTnI, CK, CK-MB levels and Gensini score, prolonged QRS interval, lower rate of ST-segment resolution and left ventricular ejection fraction (LVEF) than in patients without fQRS (all P < 0.01 or P < 0.05). (2) Pearson correlation analysis showed that the rate of ST-segment resolution (r = -0.207, P = 0.002),Gensini score (r = 0.191, P = 0.004), LVEF(r = -0.188, P = 0.006), cTnI(r = 0.172, P = 0.010), and the TIMI grade post p-PCI (r = -0.148, P = 0.028) were significantly related with the presence of fQRS. (3) Multivariate logistic regression analysis demonstrated that presence of fQRS at pre-PCI (OR = 2.908, 95%CI:1.095-7.723, P = 0.032) , the number of leads with fQRS before PCI (OR = 1.582, 95%CI:1.250-2.002, P < 0.001), and increased QRS interval (OR = 0.955, 95%CI: 0.924-0.988, P = 0.008) were independent predictors of imperfect ST-segment resolution.</p><p><b>CONCLUSIONS</b>fQRS is related to imperfect ST-segment resolution in STEMI patients undergoing p-PCI.fQRS may be a useful parameter to identify the patients with severe coronary lesion, larger areas of ischemic injury and myocardial infarction as well as severe left ventricular contracted dysfunction.</p>