- Research article
- Open Access
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Prevalence and related factors of depressive symptoms in hemodialysis patients in northern China
© The Author(s). 2017
- Received: 3 August 2016
- Accepted: 31 March 2017
- Published: 5 April 2017
To determine the prevalence of depressive symptoms and to explore related factors of depressive symptoms in hemodialysis (HD) patients in northern China.
We used a cross-sectional research design to recruit 227 chronic kidney disease (CKD) patients who were undergoing HD treatment in northern China during December, 2012 to March, 2013. The Chinese edition of the Center for Epidemiologic Studies Depression (CES-D) was used to measure depressive symptoms. Information on quality of life (QOL), activities of daily living (ADL), social support status, coping style, self-efficacy, ego resiliency and demographic characteristics was all collected by face to face interview. Multivariate logistic regression analysis was used to explore related factors of depressive symptoms.
The prevalence of depressive symptoms among HD patients was 29.1%. Patients with a lower mood have worse ADL and QOL than patients with better mood. Patients with a lower mood have got less social support than patients with better mood, including both family support and outside family support. For coping style, patients with a lower mood were more inclined to choose “acceptance-resignation” coping style than patients with better mood, while the result is opposite in “avoidance” coping style. And patients with a better mood have better self-efficacy and ego resiliency than patients with lower mood. Multivariate logistic regression analyses revealed that ADL (OR = 1.124, p = 0.002), family support (OR = 0.867, p = 0.021), “acceptance-resignation” coping style (OR = 1.228, p = 0.022), and ego resiliency (OR = 0.944, p = 0.021) were associated with low mood independently.
The prevalence of depressive symptoms is high in CKD patients on HD in northern China. activities of daily living, family support, “acceptance-resignation” coping style and ego resiliency were independently associated with depressive symptoms.
- Depressive symptoms
- Hemodialysis patients
- Activities of daily living
- Social support
- Coping style
- Ego resiliency
With the prevalence of chronic kidney disease (CKD) at 10.8%, there are up to 119.5 million patients with CKD in China. A large portion of patients with CKD progress to end-stage renal disease (ESRD), which need renal replacement therapy [1, 2]. At the end of 2013, the number of patients receiving dialysis was 326,000 in mainland China, which puts a huge burden on patients and the society [3–5].
Depression is a chronic and recurrent illness. Patients with CKD on hemodialysis (HD) have to endure physical discomforts related to their illness and have to face various stresses, family problems, which increasing the risk of depression . The prevalence of depression is higher among patients receiving HD, with estimated rates ranging from 23 to 42% in the USA and Europe, and 45.9% in Taiwan [7–11]. Furthermore, clinical depression and subthreshold depressive symptoms are strongly associated with poor adherence to treatment, increased mortality and rates of hospitalization [12–16].
Although an association between depression and HD has been strongly suggested, the prevalence and related factors of depressive symptoms among CKD patients on HD in northern China are largely unknown. The main purposes of this study were to (1) assess the prevalence of depressive symptoms of HD patients in northern China, (2) explore demographic and clinical characteristics that might identify patients at high risk for depressive symptoms, (3) make comprehensive assessment by applying questionnaires of quality of life (QOL), social support, coping style, self-efficacy and ego resiliency, and try to find correlates of depressive symptoms of patients on HD.
A cross-sectional study was conducted by cluster sampling in two affiliated hospitals of China Medical University, from Dec 12, 2012 to Mar 15, 2013. Patients with CKD who received HD for at least one month participated in this study, and were face to face interviewed. Patients were interviewed while receiving dialysis treatments by medical students who were extensively and repeatedly trained by psychiatry faculty. All of the participants were well informed and had written informed consent. The study was approved by the Ethics Committee on Human Experimentation of The First Hospital of China Medical University.
The inclusion criteria for study participation were as follows: (1) age > 16 years; (2) ESRD patients who were undergoing HD therapy for at least one month; (3) had no history of transplant. The exclusion criteria were (1) younger than 16 years old; (2) patients with dementia or cognitive impairment which were defined by self or family report; (3) patients with unconsciousness or inability to read or write; (4) patients with severe complications of the heart, lung, brain and other parts of the body; (5) previous treatment for depression. There was no significant difference in age, sex and disease between excluded patients with depression and selected patients.
Demographic and clinical characteristics
Demographic characteristics included age, gender, marital status (married/others), educational level (≤junior high school/> junior high school), financial status, HD duration and patient’s functional status.
Data related to clinical characteristics, including cause of CKD, duration of renal disease, and ionic concentration were collected from hospital records. In addition, concern about arteriovenous fistula was also collected from patient interviews.
Measurement of depressive symptoms
Chinese edition of the Center for Epidemiologic Studies Depression (CES-D) was used to measure depressive symptoms . It includes 20 items, with each one comprising four categories: (0) never, (1) sometimes, (2) frequently and (3) always. Scores of 16 or more are defined as depressive symptomes. Participants were divided into groups of low and normal mood by score of 16. It has been widely used in Chinese sample with satisfied validity and reliability (Cronbach’s alpha was 0.8895).
Measurement of functional status
Activities of Daily Living Scale (ADL) was used to measure patient’s functional status . ADL, a 14-item self-rating scale can be categorized into basic ADL and instrumental ADL, which evaluated by six items (i.e. bathing, dressing, walking, toileting, tooth brushing and eating) and eight items (i.e. meal preparation, shopping, clothes washing, telephone using, finances managing, transferring, doing housework, and medicine taking) respectively . Each item is scored on a 4-point scale, and higher score indicates a higher level of dependence. (Cronbach’s alpha was 0.8709).
Assessment of quality of life
QOL was evaluated by using the 36-item Short-Form Health Survey (SF-36). The SF-36 measures eight different dimensions of health, which is described by a range from 0 to 100 in score, with a higher score indicating a better QOL. The accuracy of SF-36 using within Chinese HD patients has been confirmed previously (Cronbach’s alpha was 0.9116) .
Assessment of social support
Perceived Social Support Scale (PSSS) was used to assess social support status. PSSS, containing 12 self-evaluating clauses, can be categorized into family support and outside family support. Each clause is scored from 1 (strongly disagree) to 7 (strongly agree), and higher score indicates a higher social support got by the participant. The reliability and validity of the Chinese Version of PSSS are satisfactory (Cronbach’s alpha was 0.8792) [21, 22].
Assessment of coping style
Coping style was assessed by using the Chinese edition of Medical Coping Modes Questionnaire (MCMQ) . It consists of 20 items, including three critical subscales: confrontation, avoidance, and acceptance-resignation. (Cronbach’s alpha was 0.7268, 0.6345, and 0.6486, respectively).
Assessment of self-efficacy
Self-efficacy was assessed by using the adapted General Self-efficacy Scale, which was evolved from the English version. It includes 10 items, and each item is scored on a 4-point scale, ranging from strong disagreement (1) to strong agreement (4), and higher score indicates a higher level of self-efficacy. The reliability of the scale is high (Cronbach’s alpha was 0.9174).
Assessment of ego resiliency
Ego Resiliency Scale was used to assess ego resiliency . It includes 14 items rated on a 4-point scale, ranging from low level (1) to high level (4), and higher score indicates a higher level of ego resiliency [25, 26]. (Cronbach’s alpha was 0.7868).
Continuous data are presented as means ± standard deviations. Student’s t-test was used to compare the means of normally distributed variables between “low mood” and “normal mood”, and the Mann–Whitney U test was used for variables that were not normally distributed. Differences among categorical variables were analyzed by using chi-square test or two-tailed Fisher’s exact test. Factors associated with depressive symptoms were determined by multivariate logistic regression analysis. The variables selected into the multivariable logistic model were the ones which were statistically significant, or had significant impacts on the result according to literature reports.
The Statistical Package for Social Sciences Version 11.5 (SPSS Inc., Chicago, IL, USA) was applied for statistical analysis, and the statistical significance was set at P < 0.05 (two- tailed test).
Description of demographic and clinical characteristics of patients
Demographic characteristics of HD patients with low and normal mood
Number of subjects
n = 227
(CES-D < 16)
n = 161
Low mood (CES-D > =16)
n = 66
Gender, n (%)
Age (years)(mean ± SD)a
49.13 ± 14.20
49.65 ± 14.60
HD duration (months)
Marital status, n (%)
≤ Junior high school
>Junior high school
Monthly income per person (Yuan)
Primary kidney disease
Ca (mmol/L)(mean ± SD)a
2.11 ± 0.30
2.18 ± 0.28
Total weekly urea Kt/V (mean ± SD)a
1.4 ± 0.5
1.4 ± 0.5
1.4 ± 0.5
Concern about arteriovenous fistula
Not at all
Renal disease duration (months)
Activities of daily living
15.4 ± 3.9
18.1 ± 6.3
SF-36 (mean ± SD)a
81.1 ± 18.3
67.7 ± 24.4
Role limitation due to physical problems
53.1 ± 40.7
28.8 ± 38.0
Role limitation due to emotional problems
78.9 ± 32.6
44.9 ± 45.5
69.4 ± 22.2
47.3 ± 24.8
85.7 ± 12.8
54.9 ± 22.9
Energy and vitality
69.1 ± 18.7
42.8 ± 21.0
82.4 ± 25.7
63.6 ± 34.1
General perception of health
49.3 ± 20.2
29.1 ± 16.9
Social support (mean ± SD)a
25.3 ± 2.6
23.5 ± 3.6
Outside family support
44.5 ± 8.9
37.7 ± 11.1
Coping style (mean ± SD)a
18.8 ± 4.5
17.9 ± 4.5
18.1 ± 3.3
17.1 ± 3.1
10.6 ± 1.9
11.9 ± 2.3
Self-efficacy (mean ± SD)a
29.7 ± 6.7
24.4 ± 7.6
Ego resiliency (mean ± SD)a
41.1 ± 7.9
36.4 ± 6.9
Other causes of ESRD not specified in Table 1 included chronic interstitial nephritis (8.8%), polycystic kidney disease (4.8%), renal allograft loss (3.5%), lupus nephritis (2.2%), purpura nephritis (1.8%), HBV associated glomerulonephritis (1.8%), gouty nephropathy (1.3%), systemic vasculitis (0.9%), obstructive nephropathy (0.4%), trauma (0.4%), and unknown causes (4.9 %).
Description of the patients’ depressive symptoms
In our study, sixty-six patients (29.1%) suffered from depressive symptoms. Table 1 shows the demographic characteristics of all participants. There was no significant difference between groups of low and normal mood in HD duration, marital status, educational level, religion, primary kidney disease or renal disease duration. Patients with depressive symptoms had lower monthly income and concerned more about arteriovenous fistula.
Table 1 also shows the scores of ADL, QOL, social support, coping style, self-efficacy and ego resiliency. Patients with a lower mood have worse ADL and QOL than patients with better mood. For both family support and outside family support, patients with a lower mood have got less social support than patients with better mood. Patients with a lower mood more inclined to choose “acceptance-resignation” coping style than patients with better mood, while the result is opposite in “avoidance” coping style. And patients with a better mood have better self-efficacy and ego resiliency than patients with lower mood.
Multivariate logistic regression analysis for related factors
The multivariate logistic regression analysis for exploring factors of depressive symptoms
0.963 ~ 1.017
(male vs. female)
0.379 ~ 1.680
Activities of daily living
1.043 ~ 1.212
0.768 ~ 0.979
Outside family support
0.935 ~ 1.010
0.903 ~ 1.062
0.861 ~ 1.084
1.030 ~ 1.466
0.914 ~ 1.019
0.899 ~ 0.991
HD duration (months)
(>60 vs. ≤24)
0.860 ~ 5.395
HD duration (months)
(25–60 vs. ≤24)
0.486 ~ 2.878
*p < 0.05; ** p < 0.01
In our study, the prevalence of depressive symptoms in CKD patients on HD was 29.1%. The result is consistent with previous data showing a prevalence of depression in patients on HD ranges from 23% to 45.9% [7, 8]. However, the result is a little higher than the prevalence of depression among pre-dialysis CKD patients [27, 28]. Compared with the population in developed countries, Chinese often feel embarrassed to seek mental health care because of the cultural issues, so that the mental health status of Chinese has been ignored for decades, and there are less studies focus on mental health of patients on HD [29, 30]. Therefore, summarizing the prevalence of depressive symptoms in patients on HD in northern China is an important first step, then developing additional research priorities .
Patients with a lower mood have worse ADL than patients with better mood. Also, ADL was associated with low mood independently. Our finding was in agreement with some previous studies . Patients in ESRD struggled to carry out normal daily life despite the dependency caused by the illness . The reality that they could not finish routine activities independently, such as bathing or doing housework may be associated with depressive symptoms. In a research among 5763 patients on HD, the findings showed that aerobic physical activity was associated with fewer depression symptoms . Finding some effective physical activity regimens which were suitable for Chinese HD people to improve the functional status may be a feasible scheme to reduce depressive symptoms in patients under HD treatment.
In our study, we found that patients with a lower mood received less social support than patients with better mood, including both family support and outside family support. And family support was negatively associated with low mood. Our finding was in agreement with previous study in patients on peritoneal dialysis (PD) in southern China . Social support refers to the perception and actuality that one gets assistance from other people . HD as a long-term management strategy, patients under HD treatment may lose personal freedom and social connectedness . The characteristic of HD treatment changes the life style of family caregivers too. It is important that not only for the patients, but also for the family members to focus on preparation for the change to the new way of life . According to our result, family support is associated with low mood, the support received from family is more important to the patients under HD treatment. For example, patients relied on spouses and siblings for help with transportation to and from the dialysis unit, and discussed with them the difficulties associated with HD [39, 40]. As family support is highly valued, the family members should give more advice and help.
In assessing the coping style, patients with a lower mood more like to select “acceptance-resignation” coping style than patients with better mood. And “acceptance-resignation” coping style was associated with low mood independently. This result was in agreement with previous study in patients on peritoneal dialysis (PD) in southern China . Patients on HD must confront with constant threat of diseases and death, which will impose them many challenges and difficulties, and will often require new and different ways to cope with. This result suggested that patients with low mood were inclined to the usage of “acceptance-resignation” coping style. Use of this type of coping style indicates a lack of hope, shows that patients under HD regard their disease as non-solving, so it is not surprising that “acceptance-resignation” coping style are associated with low mood in patients on HD.
In our study, we also found that patients with a better mood have better ego resiliency than patients with lower mood. And ego resiliency was independently associated with low mood. Ego resiliency is an individual’s ability to adapt to stress and adversity. Individuals with better ego-resiliency are likely to adjust well to changing environment . Thus, physicians should evaluate ego-resiliency of HD patients, and help them developing ego-resiliency may moderate the happening of the depressive symptoms.
We could speculate on the situation of the whole population according to results of this study, based on the property of cluster sampling. However, several limitations of our study should be considered. First, patients recruited in our study were only from two affiliated hospitals which may limit to public hospitals in city. Second, since this study is a cross-sectional study, we couldn’t get causality based on our findings, further longitudinal studies with treatment interventions is necessary.
In conclusion, based on cross-sectional survey, our findings revealed that in HD patients in northern China, the prevalence of depressive symptoms was high. ADL, family support, “acceptance-resignation” coping style and ego resiliency were independently associated with depressive symptoms. Physicians should give more attention to prevent and treat depressive symptoms among HD patients.
The authors wish to thank the dialysis nurses and doctors at the participating dialysis units: Department of Nephrology, The First Hospital of China Medical University, and Department of Nephrology, General Hospital of Fushun Mining Bureau.
This study was supported by grant from Ministry of Health (No. 2011BAI10B02), Chinese Society of Nephrology (No. 13030320417) and Scientific research of The First Hospital of China Medical University.
Availability of data and materials
The data will not be made available in order to protect the participants identity.
XL, XY, LY, QZ and LW contributed to designing and conducting the study; XL drafted the manuscript; XY contributed to analysis and interpretation of data; DS, XZ, TX, and QL contributed to acquisition of data. All authors reviewed and have approved the final manuscript.
The authors declare that they have no competing interests.
Consent for publication
Ethics approval and consent to participate
The study was approved by the Ethics Committee on Human Experimentation of The First Hospital of China Medical University (Ethical approval No. 2015–112-2). All of the participants were well informed about the content and the aim of the questionnaire. All surveys were conducted after obtaining written consent from the participants.
The authors adhered to STROBE guidelines/methodology.
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