[Depression status of elderly patients with metabolic syndrome in three provinces of China].

Objective: To understand the depression status and its influencing factors in elderly patients with MS in China and to explore the correlation between various components of elderly MS and depression. Methods: This study is based on the "Prevention and Intervention of Key Diseases in Elderly" project. We used a multi-stage stratified cluster random sampling method to complete 16 199 elderly aged 60 years and above in 16 counties (districts) in Liaoning, Henan, and Guangdong Provinces in 2019, excluding 1 001 missing variables. Finally, 15 198 valid samples were included for analysis. The respondents' MS disease was obtained through questionnaires and physical examinations, and the respondents' depression status within the past half month was assessed using the PHQ-9 Depression Screening Scale. The correlation between elderly MS and its components and depression and its influencing factors were analyzed by logistic regression. Results: A total of 15 198 elderly aged 60 years and above were included in this study, with the prevalence of MS at 10.84% and the detection rate of depressive symptoms in MS patients at 25.49%. The detection rates of depressive symptoms in patients with 0, 1, 2, 3, and 4 MS abnormal group scores were 14.56%, 15.17%, 18.01%, 25.21%, and 26.65%, respectively. The number of abnormal components of MS was positively correlated with the detection rate of depressive symptoms, and the difference between groups was statistically significant (P<0.05). The risk of depression symptoms in patients with MS, overweight/obesity, hypertension, diabetes, and dyslipidemia was 1.73 times (OR=1.73, 95%CI:1.51-1.97), 1.13 times (OR=1.13, 95%CI:1.03-1.24), 1.25 times (OR=1.25, 95%CI:1.14-1.38), 1.41 times (OR=1.41, 95%CI:1.24-1.60), 1.81 times (OR=1.81,95%CI:1.61-2.04), respectively, more than those without the disease. Multivariate logistic regression analysis showed that the detection rate of depressive symptoms in patients with sleep disorders was higher than that with normal sleep (OR=4.89, 95%CI: 3.79-6.32). The detection rate of depressive symptoms in patients with cognitive dysfunction was 2.12 times higher than that in the average population (OR=2.12, 95%CI: 1.56-2.89). The detection rate of depressive symptoms in patients with impaired instrumental activities of daily living (IADL) was 2.31 times (OR=2.31, 95%CI: 1.64-3.26) higher than that in the average population. Tea drinking (OR=0.73, 95%CI: 0.54-0.98) and physical exercise (OR=0.67, 95%CI: 0.49-0.90) seemed to be protective factors for depression in elderly MS patients (P<0.05). Conclusions: Older patients with MS and its component abnormalities have a higher risk of depression than the average population. Sleep disorders, cognitive impairment, and IADL impairment are important influencing factors for depression in elderly MS patients, while tea drinking and physical exercise may help to reduce the risk of the disease.

[A preliminary study on relationship between Atractylodes lancea and A. chinensis as analyzed by RAPD].

OBJECTIVE: To study the relationship between A. lancea and A. chinensis by RAPD analysis. METHOD: Using 10 random primers, RAPD of seven Atractylodes samples was performed. The result was analyzed by RAPDistance Package Version 1.04. RESULT: A total of 60 polymerphic loci were amplified. It appears that the Atractylodes samples tend to cluster in relation to their habitats, and A. lancea has close phylogenetic relationship with A. japonica. CONCLUSION: A certain correlation among the chemical composition, genetic diversity and geographic distribution has been revealed. It is reasonable to separate A. lancea from A. chinensis according to their habitats.

[A study on pollen morphology of Dipsacus].

OBJECTIVE: To study the pollen morphology of Dipsacus L. produced in China. METHOD: Examining the pollen morphology of 17 species and 2 varieties of Dipsacus L. with light microscope and scanning electron microscope. RESULT: The shape of pollen grains is spheroidal and the aperture is tricolpate. The ornamentation of exine may be divided into 3 types: dispinulate-reticulate, dispinulate-foveolate, dispinulate-rugulate or nearly smooth. CONCLUSION: Dipsacus is a natural class group, and the slight difference of its pollen grains is useful to some extent in the division of species.