LIAN Ying, JIA Cun-xian, QIU Hui-min, et al. Reliability and validity of Life Satisfaction Index A in study on attempted suicide among rural residents[J]. Chinese Journal of Public Health, 2015, 31(8): 1087-1091.
Reliability and validity of Life Satisfaction Index A in study on attempted suicide among rural residents
LIAN Ying, JIA Cun-xian, QIU Hui-min, et al
Shandong Provincial Qianfoshan Hospital, Ji'nan Municipal Infectious Disease Hospital, Ji'nan, Shandong Province 250014, China
Abstract: Objective To assess the reliability and validity of Life Satisfaction Index A(LSIA) in a case-control study on attempted suicide among rural residents.Methods A total of 407 attempted suicides happened from October 1,2009 to March 31,2011 were enrolled in the study.The control was matched with the same age(no more than 3 years),gender and residenctial place as the attempted suicide.The reliability and validity of LSIA was evaluated by calculating Cronbach's alpha coefficient,correlation coefficient,construct validity,criterion-related validity,and discriminant validity.Results The Cronbach α values were 0.828 and 0.734 in attempted suicides and living controls,respectively.The item-total correlation coefficients,if the item was deleted from the scale,ranged from 0.134 to 0.648(P<0.05) for the suicide group and 0.095 to 0.524(P<0.05) for the control group.Exploratory factor analysis was carried out and 5 factors were yielded in attempted suicide group,including zest to life,resolution and fortitude,congruence between desired and achieved goals,and self-assessment and mood,with a cumulative contribution rate of 52.89% of the total variance.And in the control group 6 factors were yielded,including zest to life,resolution and fortitude,congruence between desired and achieved goals,self-assessment,and mood and indifference,with a cumulative contribution rate of 51.45% of the total variance.The total scores of LSIA,Beck Hopelessness Scale(BHS),and Center for Epidemiologic Studies Depression Scale(CES-D) were 12.20±4.86,44.85±20.72,and 13.25±16.59,respectively.Criterion validity analysis demonstrated a negative correlation among the scores of LSIA and BHS,CES-D(r=-0.720,-0.715,P<0.001 for all).The total score of LSIA in the attempted suicides was 9.39±4.59,while the score of LSIA in the controls was 15.00±3.23,with a significant difference between the two groups(t=20.20,P<0.001).Conclusion The reliability,criterion validity and structural validity of Life Satisfaction Index A are acceptable in attempted suicide study.However,further research is needed to modify and improve some items.
Key words:
Life Satisfaction Index Aattempted suicidereliabilityvalidity
生活满意度是人们对自己生活状态的主观体验和心理满足程度,是衡量人们生活质量的重要指标之一[1]。许多研究表明,生活满意度作为激发个体情绪体验的中介变量,与自杀行为之间有密切的联系[2, 3]。生活满意度量表包括3个独立的分量表,其中生活满意度评定量表(Life Satisfaction Rating Scale,LSR)为他评量表,另2个分量表是自评量表,分别为生活满意度指数A(Life Satisfaction Index A,LSIA)和生活满意度指数B(Life Satisfaction Index B,LSIB)[4]。LSIA由与LSR相关程度最高的20个条目组成,主要用于评价老年人的生活满意度[5, 6]。为探讨LSIA在自杀未遂研究中的信度和效度,为自杀未遂研究中生活满意度的测评提供依据,本研究于2009年10月1日—2011年3月31日对山东省蓬莱、滕州、邹城、利津、莒南、宁阳6个县(市)的407例自杀未遂病例和按照性别、年龄、居住地匹配的409名正常对照人群进行问卷调查。结果报告如下。
1 对象与方法1.1 对象
Fagerstrom C,Lindwall M,Berg AI,et al.Factorial validity and invariance of the Life Satisfaction Index in older people across groups and time addressing the heterogeneity of age,functional ability,and depression[J].Arch Gerontol Geriatr, 2012, 55(2):349-356.
Lobello SG,Underhill AT,Fine PR.The reliability and validity of the Life Satisfaction Index-A with survivors of traumatic brain injury[J].Br Injury,2004,18(11):112 7-113 4.
[10]
Kleinman A.Anthropology and psychiatry.The role of culture in cross-cultural research on illness[J].Br J Psychiatry,1987,151(2):447-454.