中國(guó)北方老年人輕度認(rèn)知障礙的影響因素探究
[Abstract]:AIM: To explore the influencing factors of mild cognitive impairment (MCI) in elderly people (> 60 y) in northern China. To explore the relationship between MCI and lifestyle, dietary factors, biochemical indicators, immune indicators, plasma fatty acid (FA), and to explore the influencing factors of MCI. Methods: A case-control study was conducted in three communities randomly selected from Shijiazhuang City, Hebei Province. All 60y elderly in three communities were selected as subjects. The study was divided into two steps: first, according to the health status of community residents. According to the inclusion and exclusion criteria, all the elderly were initially screened, then the basic data were investigated, and then the elderly were screened again according to the inclusion and exclusion criteria. All the MCI patients in the study group were identified according to the diagnostic criteria of normal cognition, and all the normal cognitive people in the three communities were selected by simple random sampling to control group. The ratio between the control group and MCI group was 1:1. In the later data processing, this paper will analyze the life style, dietary factors, blood lipid index, immune index, the relationship between fatty acid (FA) and MCI, and find out the influencing factors of MCI. The specific analysis process is as follows: first of all, the various indicators. The distribution of MCI in the two groups was analyzed preliminarily; then the effects of lifestyle, dietary factors, biochemical indicators, metabolic diseases, immune indicators and plasma fatty acids on MCI were investigated by univariate logistic regression analysis; after univariate analysis, the statistically significant variables in univariate analysis were included in multivariate logistic regression analysis. In the result analysis, the descriptive use cases (n) and constituent ratio (%) of the classified variables, the descriptions of the quantitative variables were expressed by mean (x) + standard deviation (S) or median (M) and upper and lower quartile (Q1, Q3); the comparison between the two groups of the classified variables was performed by_2 test, and the rank sum test was used for those who did not meet the criteria. The comparison between the two groups was conducted by t test, and those who did not meet the use conditions were tested by Wilcoxon symbolic rank sum test. The influencing factors of MCI were analyzed by single factor Logistic regression, and then analyzed by multi-factor logistic regression model. Compared with the control group, the proportion of 60-64y in MCI group was lower (42.74% 55.65%), 65-69y in the middle age group (33.87% 23.39%), 70-74y (17.74% 8.87%) was higher than that in the control group, and 75-y in the high age group (5.65% 12.1%) was lower than that in the control group again. The proportion of participants in the MCI group was lower than that in the control group (12.1% 18.55%) and the time spent on housework in the MCI group was significantly less than that in the control group (p.0001); the proportion of occasional smokers (6.45% 5.65%) and frequent smokers (11.29% 4.03%, P = 0.0908) in the MCI group was higher than that in the control group; while the living conditions (p = 0.7757) and recreational activities (p = 0.92%) in the MCI group were higher than that in the control group. 65), drinking (p = 0.3903), sitting time (p = 0.1599), sleeping time (p = 0.5955) were not significantly different. Among dietary factors, the frequency of eggs intake in the control group was higher than that in the MCI group, while the frequency of nuts intake was lower than that in the MCI group. The levels of HDL-C (1.141.18) and ApoA-1 (1.511.42) in MCI group were lower than those in control group, while the levels of ApoB (0.910.83) and ApoE (4.193.58) were higher than those in control group, but the levels of TC, TG, LDL-C, HDL-C/LDL-C, PL (a) and LP-PLA2 were not significantly different between the two groups. The prevalence of hypercholesterolemia, hypertriglyceridemia, hypohigh-density lipoprotein cholesterolemia, and anemia were not significantly different between the two groups. Immune indexes CRP, IL-6 and TNF-alpha in MCI and the control group were not significantly different. There was no significant difference in the distribution of plasma FA between the MCI group and the control group. There was no difference in the total content of SFA between the two groups, but the content of component C16:0 (p = 0.0061) in the MCI group was lower than that in the control group. There was no significant difference in the distribution of MUFA between the two groups. However, the levels of component C22:6n-3 were higher in the control group (p = 0.0057), the total content of n-6PUFA (p 0.0001) and its component C18:2n-6c in the MCI group were higher than those in the control group (p = 0.0003), the ratio of total content of PUFA to total content of n-3/n-6PUFA (p = 0.0140) and C22:6n-3/C20:4n-6 (p = 0.0294) in the normal group were higher than those in the MCI group. Univariate logistic regression analysis showed that age, education level, insomnia, visual acuity, smoking and housework time were all influencing factors of MCI. Within the 60-74y range, the younger the age, the lower the risk of MCI (all p0.05), and compared with the 60-64y group, the 65-69y and 70-74y groups had wind of MCI. The higher the education level, the lower the risk of MCI. Insomnia, decreased vision, and smoking were all risk factors of MCI. Every hour of housework, the risk of MCI increased to 0.621 times. Single factor Logistic regression analysis showed that the relationship between dietary factors and MCI was not obvious. The biochemical indexes were divided into low level group, middle level group and high level group according to three-digit. HDL-C (high level group OR = 0.532), ApoA-1 (high level group OR = 0.490) were protective factors of MCI. ApoB (middle level group, high level group OR = 1.882, 2.294), ApoE (high water group OR = 1.882, 2.294). TC (OR = 0.517) and LP (a) (OR = 0.491) had protective effects on MCI only at moderate levels. However, immune indexes were not significantly associated with MCI. Hypertension (OR = 1.740), diabetes mellitus (OR = 2.458) and dyslipidemia (OR = 1.845) were risk factors for MCI in metabolic diseases. There was no significant difference in the total content of n-3PUFA between MCI group and MCI group (p = 0.0061). There was no significant difference in the total content of n-3PUFA between MCI group and control group (p = 0.2782). There was no difference in the total content of n-3PUFA between the two groups, but the total content of component C22:6n-3 was higher in the control group (p = 0.0057). The ratio of n-3/n-6 PUFA (p = 0.0140) and C22:6n-3/C20:4n-6 (p = 0.0294) in the two groups were higher in the normal group than in the MCI group. The total content of C16:0, C22:6n-3, n-6PUFA, C18:2n-6c and the ratio of n-3/n-6PUFA and C22:6n-3/C20:4n-6 in MCI and control groups were still significantly different. In addition, the total content of n-3PUFA (p = 0.0330) and the distribution of C20:4n-6 (p = 0.0005) in MCI and control groups were significantly different. There were also significant differences. 3 Multivariate logistic regression analysis of the relationship between various indicators and MCI included lifestyle, apolipoprotein, LP (a), LP-PLA2, metabolic diseases, and statistically significant indicators in single-factor logistic regression analysis of plasma FA. The higher the education level (OR 0.248, 0.133 for junior secondary school, 0.133 for junior college and above) and the longer the housework time (OR = 0.605 for every hour of housework), the higher the ratio of n-3/n/n. The higher the - 6 PUFA (OR = 0.361 compared with the low level group), the lower the risk of MCI, these are independent protective factors of MCI; and the middle level of C20:4n - 6 is the risk factor of MCI (compared with the low level group, the middle level OR = 2.600, but the high level group and the low level group have no significant difference in the risk of MCI), dyslipidemia (OR = 3.075). Conclusion Age and education are the independent risk factors for MCI. The risk of MCI increases with age in 60-74y and decreases with age in 75-y. Education is an independent risk factor for MCI. Doing housework can prevent and delay the occurrence and development of MCI. HDL-C and apolipoprotein ApoA-1, ApoB and ApoE were the influencing factors of MCI. Metabolic diseases were also the risk factors of MCI. Blood lipid was an independent risk factor of MCI. No correlation was found between immune indexes and MCI. There was a close relationship between FA and MCI. C18:3n-3 in n-3PUFA is a protective factor for cognition. C18:3n-3 in n-3PUFA is harmful to cognition at moderate level; C22:6n-3 has protective effect on MCI and has a threshold of effective effect. n-6PUFA is harmful to cognition. On the one hand, it may inhibit the entry and distribution of n-3PUFA in tissues; on the other hand, it may compete with n-3PUFA in the process of synthesis. The enzyme further inhibits the action of n-3PUFA.
【學(xué)位授予單位】:中國(guó)疾病預(yù)防控制中心
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:R749.1
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