| Objective:Since October 1,1998 China began the formal implementation of voluntary blood donation,voluntary blood donation has been on the clinical use of blood supply and blood quality plays a vital role.However,China’s unpaid blood donation is still facing the proportion of repeat donors is much lower than the initial blood donors.In Beijing,although more than 430 million people were involved in blood donation from 1998 to 2012,only 33,000 people had donated blood more than 10 times,and only 23000 more than 20 times.More and more studies show that the scientific voluntary blood donation can promote physical and mental health,such as,can improve immunity,delay aging,reduce the risk of disease,mental health have some positive effects.There are also studies found that blood donation behavior by blood donation cognitive impact.However,most studies only discuss the contribution of unpaid blood donation to physiological or mental health,or the impact of unpaid blood donation on blood donation behavior,and lack of research among the three.Therefore,this study introduced the cognitive factors of unpaid blood donation behavior based on the research methods of moderation effect and mediation effect,aimed at studying whether the perceptions of blood donation in the relationship between unpaid blood donation behavior and QOL plays the role of moderator,mediator.Methods:1031 subjects were blood donors and accompanied non-blood donors recruited from Beijing Red Cross Blood Center or participanted in the network questionnaire survey using cross-sectional survey research methods.The survey included personal information(sex,age,education level,marital status,height,weight etc),behavioral lifestyle,blood donation information(type,times,blood types cognition etc)and QOL.The 36-item short term health survey(SF-36)used by QOL assessment can calculate the score on physical component summary(PCS)through physical functioning(PF),role-physical(RP),bodily pain(BP),general health(GH),and calculate the score on mental component summary(MCS)through vitality(VT),social functioning(SF),role emotional(RE),mental health(MH).Statistical analysis:(1)By chi-square test analysis of characteristics of different groups in different frequency distribution between blood donation are statistically significant differences between them(2)Using analysis of variance to the QOL status difference compared the number of different blood donation;Variance analysis statistically significant,with 1-4times to donate blood groups for reference,Bonferroni test was used to analyze the differences between different characteristic groups,corrected-P value judgment if there is a statistically significant difference.(3)using Pearson bivariate correlation analysis the correlation between the cognition of unpaid blood donation,unpaid blood donation behavior,and health related quality of life(4)in the first place,the number of unpaid blood donation and blood donation cognitive scores do centralized processing,namely their minus the mean;Generating interaction "cognitive*number of unpaid blood donation",then using the hierarchical regression analysis method,respectively with SF-36 physiological areas(PCS)and their physiological function(PF),physiological function(RP),pain(BP),general health(GH)dimension,the vitality of psychological field(MCS)and its subordinate(VT)(SF),social function,emotional function(RE),mental health(MH)dimension scores as the dependent variable,the first step into the number of unpaid blood donation and gender,age,marriage condition,cultural level,smoking habits,drinking habits,exercise habits and sleep habits,BMI as independent variables,the second step into the blood donation cognitive scores as independent variables,the third step into the interaction term "cognitive*number of unpaid blood donation",research their respective variables and the interaction item dimensions for QOL and the effect of cognitive in unpaid blood donation and blood donation behavior and the relationship between the dimensions QOL of whether there is a moderator(5)in the first place,the number of unpaid blood donation and blood donation cognitive scores do centralized processing,namely their minus the average,respectively by SF-36 PCS and their PF,RP,BP,GH dimension,the MCS and its subordinate VT,SF,,RE,MH dimension scores as the dependent variable,the number of unpaid blood donation and gender,age,marriage condition,cultural levels,smoking habits,drinking habits,exercise habits and sleep habits,BMI as independent variable to establish the regression equation,the partial regression coefficient,if partial regression coefficient was statistically significant,the second step,with cognitive scores of unpaid blood donation and confounding factors related to the dependent variable,the number of unpaid blood donation for the independent variable,to establish the regression equation,inspection of the partial regression coefficient significance;Third step,respectively by SF-36 PCS and their PF,RP,BP,GH dimension,the MCS and its subordinate VT,SF,,RE,MH dimension scores as the dependent variable,blood donation cognition score and the number of unpaid blood donation and confounding factors as independent variables,and establish the regression equation and verify the partial regression coefficient is significant.If necessary,further Sobel inspection,verification mediator effect is significant or not.Results:1.The QOL in different donation frequency.(1)Physical aspects.Different number of physiological blood donation field QOL significant differences(P<0.001),QOL condition improved with the increase of the number of blood donation.Through pairwise comparison,unpaid donate blood group in MCSand its four dimensions in the field of physiological scored lowest,the difference was statistically significant(P<0.05);1-4 times to donate blood group in the field of PCS and BP dimension scores are donate blood with the other three groups had significant difference(P<0.05);5-9 times blood group of PCS,BP dimension,GH dimension scores were significantly higher than the unpaid blood donation group and 1-4 blood group(P<0.05);More than 10 times and blood group in PCS and GH dimension score is significantly higher than unpaid donate blood group and 1-4 times of blood donation(P<0.05).(2)Psychological aspects.Different number of psychological field blood donation QOL significant differences(P<0.05),QOL increase gradually along with the increase of the number of blood donation.Through pairwise comparison,unpaid donate blood group in the MCS and its four dimensions scored lowest,the difference was statistically significant(P<0.001);1-4 times to donate blood group in the MCS and VT dimension scores are donate blood with the other three groups had significant difference(P<0.05);5-9 times blood group MCS and its subordinate VT dimension score significantly higher than unpaid donate blood group and 1 to 4 times of blood donation(P<0.05);More than 10 times and blood group MCS and its subordinate VT,MH dimension scores were significantly higher than unpaid donate blood group and 1 to 4 times of blood donation(P<0.05).2.The relationship among unpaid blood donation behavior,cognitive and QOL.Pearson correlation analysis results show that blood donation behavior were positively correlated with QOL all dimensions,the correlation between 0.135～0.287(P=0.000).Unpaid blood donation behavior and cognitive scores were positively blood donation to the correlation(r=0.309,P=0.000).Blood donation scores and PCS,MCS field and scored eight dimensions is positive correlation between 0.105～0.285(P ＝.000).3.Moderating Effects of unpaid blood donation cognition in the relationship between unpaid blood donation behavior and QOL.Blood donation cognitive scores and the interaction between the number of unpaid blood donation items to PCS(b’=-0.088,Δ R2=0.007,P=0.004),PF(b’=-0.113,Δ R2=0.012,P=0.000),MCS(b’=-0.082,ΔR2=0.007,P＝0.006),VT(b’=-0.093,ΔR2=0.008,P =0.000),SF(b’=-0.108,△R2=0.011,P=0.000),MH(b’=-0.089,ΔR2=0.007,P＝0.003)significantly,the influence of existence.Interaction of regression coefficient in RP(b’=-0.060,P=0.058),BP(b’=-0.057,P＝0.064),GH(b’=-0.052,P=0.083),RE(b’ =-0.020,P=0.522)all scores as the dependent variable in the regression equation of no statistical significance.To further explain the relationship between Y and X,will adjust variable M is equal to the mean(M=0),lower than the average one standard deviation(M=0-1Sm),higher than the average one standard deviation(M=0+1Sm)respectively three values into the equation Y＝a’ X + bM + cXM + e’,you can get the slope of three groups of relationship between Y and X and intercept,the results show:regardless of cognitive level of blood donation,blood donation behavior positive influence of QOL are there.When the donor cognition is low,blood donation cognitive role in blood donation act and the regulation of QOL is stronger;When donating blood to achieve a higher level of learning,cognitive in blood donation act and the regulation of QOL blood donation is weak.4.Mediating Effects of unpaid blood donation cognition in the relationship between unpaid blood donation behavior and QOL.Regression analysis results showed that the physical domain and four dimensions of intermediary effect test,blood donation cognitive are partial mediation effect,PCS(b’= 0.172,P= 0.000),PF(b’ =0.122,P=0.000),the RP(b’=0.083,P=0.083),the BP(b’=0.144,P=0.000),GH(b’=0.164,P=0.000),blood donation cognition on the influence degree of each dimension of GH(30.60%),PF(24.58%),PCS(24.50%),the RP(21.82%),BP(17.71%).In psychological field and its four dimensions intermediary effect inspection,in addition to the blood donation cognition in RE dimension(b =0.060,P= 0.060),the partial mediating effect,the partial intermediary role.MCS(b = 0.138,P= 0.000),n(b = 0.177,P=0·000),SF(b =0.117,P= 0.000),MH(b =0.130,P=0.000).Blood donation cognition on the influence degree of each dimension,in turn,as the RE as the partial mediating effect,MH(30.47%),MCS(30.12%),VT(27.27%),SF(24.76%).Conclusion:Unpaid blood donation behavior has positive promoting effect on QOL.QOL condition is better than not blood donors of blood donors;the QOL of different number of blood donors blood donation,blood donation,the more the higher the QOL of blood donors.blood donation cognition in the field of unpaid blood donation behavior and PCS,PF and MCS,VT,SF,MH between regulating effect,and RE between the mediator effect completely,and PCS,PF,RP,BP,GH and MCS,vitality VT,SF,MH dimension exists partial intermediary effect.Therefore,the strengthening of blood donation publicity,to promote voluntary donation blood donation awareness,can increase the blood donation and improve the donor blood physical and mental health. |
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