Search

Your search keyword '"Jianfu Yang"' showing total 14 results
Start Over Author "Jianfu Yang" Publication Year Range Last 3 years
14 results on '"Jianfu Yang"'

1. Effects of educational attainment on comorbidity of pain and depression in Chinese older adults

Author

Haiyan Zhu, Yang Xiao, Tongjin Xie, Mohan Yang, Xun Zhou, Biao Xiao, Jingxuan Peng, and Jianfu Yang

Subjects
Educational status, Pain, Depression, Comorbidity, Aged, Science (General), Q1-390, Social sciences (General), H1-99
Abstract

Pain and depression comorbidity (PD) among older adults in China is common and significantly affects their physical and mental health. The psychosocial factors may affect people's feelings, understanding and expression of pain and depression, leading to inaccurate assessment of this condition. Educational attainment is thought to be associated with either pain or depression. However, we do not yet know the relationship between educational attainment and PD. Using data from the 2018 China Health and Retirement Longitudinal Study in 2018, we analyzed various variables in 7742 individuals aged 60 years and older. Our results indicate significant differences between the PD and non-PD populations in terms of social, lifestyle, and behavioral factors. We observed a significant decrease in the incidence of PD among older adults with higher levels of education (p

Published
2024
Full Text
View/download PDF

3. Factors associated with anxiety and depression in patients with erectile dysfunction: a cross-sectional study

Author

Yang Xiao, Tongjin Xie, Jingxuan Peng, Xun Zhou, Jinsong Long, Mohan Yang, Haiyan Zhu, and Jianfu Yang

Subjects
Depression, Anxiety, Erectile dysfunction, SAS, SDS, Psychology, BF1-990
Abstract

Abstract Background Few studies have investigated factors associated with anxiety and depression among patients with erectile dysfunction (ED). This study aimed to investigate associated factors and the prevalence of anxiety and depression in this special group in China. Methods Data from 511 patients with ED aged 18–60 years were collected between July 2021 and April 2022. The 5-item International Index of Erectile Function (IIEF-5) questionnaire, self-rating anxiety scale (SAS) and self-rating depression scale (SDS) were used to evaluate erectile function, anxiety and depression, respectively. Univariate analysis and multivariate linear regression analyses were used to explore the associated factors of depression and anxiety. Results The prevalence of anxiety and depression among ED patients was 38.16% and 64.97%, respectively. The mean anxiety index score was 47.37 ± 6.69 points, and the mean depression index was 54.72 ± 9.10 points. Multiple linear regression analysis showed that worse ED, low education level, and smoking were positively associated with increased risk of anxiety and depression. In addition, younger age, longer onset time, and irregular sleep were positively associated with high risk of anxiety, and irregular exercise was associated with severe depression. Conclusions The prevalence of depression and anxiety in ED patients is high, and the severity of ED, age, education level, smoking, onset time, regular sleep, and exercise were associated with anxiety or depression. Reversible risk factors should be avoided and individualized psychological support services are necessary for ED patients.

Published
2023
Full Text
View/download PDF

6. Multiple solutions to multi-critical Schrödinger equations

Author

Ziyi Xu and Jianfu Yang

Subjects
General Mathematics, Statistical and Nonlinear Physics
Abstract

In this article, we investigate the existence of multiple positive solutions to the following multi-critical Schrödinger equation: (0.1) − Δ u + λ V ( x ) u = μ ∣ u ∣ p − 2 u + ∑ i = 1 k ( ∣ x ∣ − ( N − α i ) ∗ ∣ u ∣ 2 i ∗ ) ∣ u ∣ 2 i ∗ − 2 u in R N , u ∈ H 1 ( R N ) , \left\{\begin{array}{l}-\Delta u+\lambda V\left(x)u=\mu | u{| }^{p-2}u+\mathop{\displaystyle \sum }\limits_{i=1}^{k}\left(| x{| }^{-\left(N-{\alpha }_{i})}\ast | u{| }^{{2}_{i}^{\ast }})| u{| }^{{2}_{i}^{\ast }-2}u\hspace{1.0em}\hspace{0.1em}\text{in}\hspace{0.1em}\hspace{0.33em}{{\mathbb{R}}}^{N},\hspace{1.0em}\\ u\hspace{0.33em}\in {H}^{1}\left({{\mathbb{R}}}^{N}),\hspace{1.0em}\end{array}\right. where λ , μ ∈ R + , N ≥ 4 \lambda ,\mu \in {{\mathbb{R}}}^{+},N\ge 4 , and 2 i ∗ = N + α i N − 2 {2}_{i}^{\ast }=\frac{N+{\alpha }_{i}}{N-2} with N − 4 < α i < N N-4\lt {\alpha }_{i}\lt N , i = 1 , 2 , … , k i=1,2,\ldots ,k are critical exponents and 2 < p < 2 min ∗ = min { 2 i ∗ : i = 1 , 2 , … , k } 2\lt p\lt {2}_{\min }^{\ast }={\rm{\min }}\left\{{2}_{i}^{\ast }:i=1,2,\ldots ,k\right\} . Suppose that Ω = int V − 1 ( 0 ) ⊂ R N \Omega ={\rm{int}}\hspace{0.33em}{V}^{-1}\left(0)\subset {{\mathbb{R}}}^{N} is a bounded domain, we show that for λ \lambda large, problem (0.1) possesses at least cat Ω ( Ω ) {{\rm{cat}}}_{\Omega }\left(\Omega ) positive solutions.

Published
2022

12. Positive solutions to multi-critical elliptic problems

Author

Fanqin Liu, Jianfu Yang, and Xiaohui Yu

Subjects
Mathematics - Analysis of PDEs, Applied Mathematics, FOS: Mathematics, Analysis of PDEs (math.AP)
Abstract

In this paper, we investigate the existence of multiple solutions to the following multi-critical elliptic problem \begin{equation}\label{eq:0.1} \left\{\begin{aligned} -\Delta u & =\lambda |u|^{p-2}u +\sum_{i=1}^k(|x|^{-(N-\alpha_i)}*|u|^{2^*_i})|u|^{2^*_i-2}u\quad {\rm in}\quad \Omega,\\ &u\in H^1_0(\Omega)\\ \end{aligned}\right. \end{equation} in connection with the topology of the bounded domain $\Omega\subset \mathbb{R}^N, \,N\geq 4$, where $\lambda>0$, $2^*_i=\frac{N+\alpha_i}{N-2}$ with $N-40$ such that if $0

Published
2022

14. Multiple solutions to Choquard equation in exterior domain

Author

Jianfu Yang and Liping Zhu

Subjects
Pure mathematics, Applied Mathematics, Bounded function, Domain (ring theory), Boundary (topology), Analysis, Mathematics
Abstract

In this paper, we show that the following nonlocal equation (0.1) { − Δ u + λ u = ( | x | − μ ⁎ | u | q ) | u | q − 2 u in Ω , u ∈ H 0 1 ( Ω ) has at least c a t Ω ( Ω ) positive solutions under certain condition on q if λ > λ 0 for some λ 0 > 0 , where Ω ⊂ R N , N ≥ 3 , is an unbounded domain with the boundary ∂ Ω ≠ ∅ , the set R N ∖ Ω is bounded.

Published
2022

Catalog

Books, media, physical & digital resources
See catalog results