Abstract
BackgroundNumerous studies suggesting the relation between self-rated health (SRH) and depression have been reported using different measures. Therefore, we attempted to determine the difference in a depressive scale based on the different ways of measuring health between global SRH (SRH-global) and age-comparative SRH (SRH-age). Then, the combined effect of SRH-global and SRH-age on depressive symptoms was further investigated.MethodsData from the Korean Longitudinal Study of Ageing (KLoSA) from 2008 to 2012 were analyzed. We divided the SRH-global and SRH-age into three levels—high, middle, and low—and combined each into nine new categories (SRH-combi). The Center for Epidemiologic Studies Depression Scale-10 Korean edition was used as the dependent variable.ResultsA total of 8621 participant were enrolled at baseline. Individuals with lower SRHs-age compared to SRH-global tended to be more vulnerable to depressive symptoms. Low SRH-global with low (b = 0.654, p < 0.001) and middle SRH-age (b = 0.210, p = 0.003) showed association with higher CESD scores. Participants with high SRH-global × low SRH-age also had higher scores (b = 0.536, p < 0.001) compared to the “middle SRH-global × middle SRH-age” reference group. In contrast, among the middle (b = −0.696, p < 0.001) and high SRH-global (b = −0.545, p < 0.001) groups, participants with superior SRH-age had statistically lower CESD scores than the reference group.ConclusionsAlthough a sole general SRH has historically been widely used, it has been suggested that use of both general and age-comparative SRH would be more powerful and easy when we consider analyzing depression in old age.Electronic supplementary materialThe online version of this article (doi:10.1186/s12888-016-1098-9) contains supplementary material, which is available to authorized users.
Highlights
Numerous studies suggesting the relation between self-rated health (SRH) and depression have been reported using different measures
The mean Center for Epidemiologic Studies Depression Scale (CESD) score at baseline was 3.77 with a standard deviation (SD) of 2.96
We put all of these independent variables together for analysis of the CESD scores using multivariate analysis
Summary
Numerous studies suggesting the relation between self-rated health (SRH) and depression have been reported using different measures. According to the Korean Statistical Informational Service (KOSIS, 2011), approximately 27.6% of the general population in Korea suffers from mental disorders during a lifetime [4]. While it is more prevalent than men, 12.0 and 9.1% were. Geriatric depression has emerged as a major social issue. It is widespread and affects at least one in six patients treated in general medical practice and an even higher percentage in hospitals and nursing homes.
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