- Open Access
Dialysis-related factors affecting self-efficacy and quality of life in patients on haemodialysis: a cross-sectional study from Palestine
Renal Replacement Therapy volume 4, Article number: 21 (2018)
Chronic kidney disease (CKD) is one of the main public health issues. It increases the morbidity and mortality of patients. Treatment includes multiple aspects such as dialysis and lifestyle modifications. The primary goal of this study was to determine factors associated with self-efficacy and health-related quality of life (HRQoL) among haemodialysis (HD) patients.
A cross-sectional descriptive correlation study was conducted on CKD patients undergoing HD at 12 different dialysis centres in Palestine. Self-efficacy was assessed by the Self-Efficacy for Managing Chronic Disease Six-Item Scale (SEMCD-6), and HRQoL was assessed using the Five-level EuroQol Five-Dimensions (EQ-5D-5L) tool. Multiple linear regression analysis was carried out to assess the association of factors with each of the SEMCD-6 and HRQoL scale scores.
A total of 283 HD patients were included in the study. A correlation test revealed moderately positive association between the EQ-5D and SEMCD-6 scores (r = 0.497, p value < 0.001). In multiple linear regression analysis, age, living status, and number of co-morbid diseases were negatively associated with SEMCD-6 scores (β = − 2.66, p = 0.016; β = − 5.71, p = 0.033; β = − 1.84, p = 0.006, respectively). Furthermore, there is a positive association between educational level and SEMCD-6 score with QoL score (β = 0.05, p = 0.017; β = 0.01, p < 0.001, respectively), while there is a negative association between the number of co-morbid diseases and QoL score (β = − 0.07, p = 0.001).
This study assessed factors associated with impaired self-efficacy and HRQoL in HD patients. The results show that impaired self-efficacy was associated with the elderly, patients living with family, and patients with a high number of co-morbid diseases. Furthermore, this study found that the worst HRQoL was associated with patients with a low education level, lower levels of self-efficacy, and a high number of co-morbid diseases.
Chronic kidney disease (CKD) is one of the major public health problems worldwide . It is characterised by progressive loss in kidney function that gradually causes end-stage renal disease (ESRD) , which requires kidney transplantation or dialysis [3, 4]. ESRD is the last stage of the National Kidney Foundation Kidney Disease Outcomes Quality . In the last 10 years, the prevalence and frequency of ESRD has risen steadily by 4–8% per year throughout the world. Diabetes mellitus (DM) is the major predisposing factor for ESRD [5, 6], accounting for nearly 44% of new cases [6,7,8]. CKD has a major effect on the individual level by increasing the morbidity and mortality of patients and also increasing healthcare costs and the demand for healthcare services on a national level . With this increasing rate of CKD, increased awareness and understanding of the overall CKD burden is needed, which may lead to improvement in the knowledge, trust, and involvement in self-managing the disease . Haemodialysis (HD) is the most common method of treatment, with approximately 90.6% of patients undergoing it. The difficulties faced by these patients are countless and influence their routine and the way they relate, as they often cause emotional difficulty and physical impairment . Treatment of patients with ESRD has multiple aspects in addition to dialysis, as it requires total lifestyle changes that affect the social and psychological state of patients .
Self-management of adults with CKD has a positive relation with health outcomes. Perceived disease-related self-efficacy (DSE) is essential to self-managing chronic disease successfully . Recent studies discuss how ESRD patients treated with HD carry out self-management activities in their daily life [11,12,13,14,15,16]. Patients should follow the treatment recommendations and learn to include them in their life circumstances in order to make CKD progress slowly and to have a stable life . Generally, the concept of self-efficacy involves finding the limit at which the patients can achieve their desired outcomes. An association between self-efficacy and self-management in patients with CKD has been shown in previous researches [11, 17, 18]. HD patients with improved self-efficacy and self-care by empowerment programmes show an increased likelihood to get involved in self-management . Higher perceived self-efficacy scores have shown a significant relation with quality of life (QoL) , a higher level of cooperation, self-care, communication, and medication-adherence behaviours . Furthermore, high self-efficacy has an association with good changes in healthcare actions and health status. An improvement in deferent aspects of HD patients has been evidenced with increased self-efficacy, decreased hospitalisations, decreased amputations, control of interdialytic weight gain, and improved QoL in diabetic dialysis patients . In order to attain a better QoL, patients with chronic renal disease should incorporate this goal in their daily life. The index of well-being or QoL is completely different from persons considered healthy, because CKD patients’ health objectives concentrate on having a health level that secures an independent life .
Chronic kidney disease was ranked the six (3.6%) as the leading cause of the most burden disease, expressed as a percentage of disability-adjusted life years (DALYs) from reported chronic diseases in the West Bank/Palestine in 2010 . According to the 2017 annual health report of the Palestinian Ministry of Health , there is an increasing number of patients with CKD who become dialysis dependent. The overall number of dialysis patients in the West Bank/Palestine has increased from 1014 patients in 2015  to 1119 patients in 2016 which showed substantial trends in patients requiring haemodialysis . A study by Younis et al. in 2015  assessed the costs of HD in Palestine. The study found that the total cost per HD patient during visits to dialysis centres was an average of US$16085 per year which covered all medications, laboratory tests, and outpatient visits. The Palestinian government covered almost all of the costs of HD and transplantation .
Despite the assessment of self-management and self-efficacy in many studies [4, 9, 11,12,13,14,15,16, 19, 25,26,27,28,29,30,31,32,33,34], no studies have been performed to calculate the self-efficacy and QoL of HD patients in Palestine. Although several research has been carried out on HD patients and about CKD in Palestine [35,36,37,38,39,40,41], a literature review showed no previous studies on the association between the QoL and self-efficacy among HD patients in Palestine. This is important, because it is thought that religion and culture may play a significant role in health-related issues. Healthcare workers should cooperate with patients to build strategies and plans that will improve patients’ health-related quality of life (HRQoL), like minimising depression as their disease progresses. Emphasis on the need to help healthcare workers to concentrate on improving knowledge, understanding, motivation, experience, self-trust, and the formation of self-efficacy and self-management for patients receiving HD by designing interventions and empowerment programmes for this purpose.
Purposes of the study
The primary goals of this study were (1) to describe the relation between HD patients’ self-efficacy and their QoL, (2) to assess factors associated with self-efficacy among HD patients, and (3) to assess factors associated with QoL among HD patients. The results of this study will be used to provide recommendations that may aid healthcare workers to teach patients the self-management-related skills for their chronic disease to help them become more confident in many aspects, such as solving their problems, performing activities and skills on their own, and overcoming barriers that affect their ideal disease self-management in order to improve their QoL.
A cross-sectional study was conducted to achieve our objectives.
Patients included in the study were selected from every dialysis centre in the West Bank, Palestine. There are 12 dialysis centres in the West Bank: one is private (An-Najah University Hospital) and the others are governmental, including Al-Watani/Nablus, Tubas Turkish, Salfit (Yaser Arafat), Jenin (Khalil Souliman), Qalqiliya (Darweesh Nazal), Hebron (Alia), Tulkarm (Thabet Thabet), Jericho, Beit Jala (Al Housain), Palestine Medical Complex/Ramallah, and Yatta (Abu Al Hassan Al Kassem) .
There were 1014 dialysis patients who came regularly to the dialysis centres in the West Bank, according to the 2015 annual health report of the Palestinian Ministry of Health which was published at the time of the study . In West Bank/ Palestine, there are 12 kidney dialysis units (11 units in hospitals of the Ministry of Health and one unit in An-Najah National University hospital in Nablus) with a total of 183 machines . According to the 2017 annual health report of the Palestinian Ministry of Health, a total of 147,494 HD sessions took place in 2016 .
Sampling procedure and sample size calculations
To achieve the goal of this study, we used a web-based calculator, which is called the Raosoft sample size calculator, to determine the sample size . We decided that the sample size will be 279 patients to get a 95% confidence level and a 5% margin of error, depending on the assumption that half of the patients correctly answered every question. The HD patients from this cross-sectional study were chosen using a convenience sampling technique. HD patients were selected from all kidney dialysis units in West Bank/Palestine using the proportional quota sampling method to be representative of the general HD population (Table 1).
Inclusion and exclusion criteria
We included participants who met the following criteria: (1) patients older than 18 years of age, (2) confirmed diagnosis of ESRD, and (3) patients on regular HD therapy for at least 6 months. We excluded the patients who had major psychiatric disorders or were seriously ill at the time of the study. We also excluded patients if they were physically or mentally unable to communicate with the interviewer.
Data collection instrument
We used an instrument that contained four sections (see Additional file 1: English and Arabic version of the instrument):
The first section covered the social and demographic factors like age, sex, residency, occupational status, the dialysis centre visited, marital status, educational level, smoking status, and monthly income.
The second section discussed the clinical status of the patients, including questions such as how many hours per dialysis session, how many dialysis sessions per week, duration of disease in months, body mass index (BMI), how many medications they use regularly to calculate the total number of chronic medications, and how many chronic diseases they have to calculate the total number of co-morbid diseases. Therefore, the presence of one or more chronic diseases (co-morbidity) was calculated only for HD patients who had chronic diseases other than CKD. Furthermore, the total number of chronic medications used was defined as types of medication (i.e. prescriptions) used for certain chronic disease.
The third part used the Self-Efficacy for Managing Chronic Disease Six-Item Scale (SEMCD-6), which is applied commonly in many chronic illnesses and concentrates on the level of confidence that the patients have in each area depending on a six-item scale. These areas include symptom control, emotional functioning, role function, and communication with doctors . Relying on a 10-point rating scale, each question has a score varying from 1 to 10 (1 = totally not confident; 10 = very confident).
The fourth part used the Five-level EuroQol Five-Dimensions (EQ-5D-5L) tool to assess the HRQoL. The Euro QoL Group developed this tool. It lets patients define their present health status during dialysis using a descriptive system of five items to measure the EQ-5D index score and the EQ visual analogue scale (EQ-VAS) . We asked the patient to choose the most accurate sentence that describes his current health status, like the ability to walk: (1) I do not have any walking problems, (2) I have mild problems with walking, (3) I have moderate problems with walking, (4) I have severe problems with walking, and (5) I cannot walk. Permission to use the Arabic version of the EQ-5D  was offered by the Euro QOL Group, and it was scored according to Euro QOL guidelines . The questionnaire was tested on a pilot sample of 15 HD patients to evaluate comprehension. The pilot sample was not included in the final sample of the study. Face and content validity of the final data collection form was evaluated by a panel of three researchers who are experts in the field of QoL for assessing the preparation, organisation, translation, and evaluation. Some items were modified as necessary. Cronbach’s alpha of the SEMCD-6 was 0.753, indicating acceptable internal consistency reliability. Additionally, Cronbach’s alpha of five dimensions of the EQ-5D index was 0.771, indicating acceptable internal consistency reliability.
Ethical approval for the study was obtained from the local health authorities that had control and rule over the local study population and from An-Najah National University’s Ethics Committee. We described the interview content to the respondents, and before the start of the interview, we obtained verbal consent from each participant.
Data analysis was performed using the Statistical Package for Social Sciences programme, version 15 (SPSS). Data for categorical variables were presented as frequencies (percentages), and data for continuous variables were presented as mean ± SD or as medians (lower-upper quartiles). We utilised the Kolmogorov–Smirnov test to assess variables for normality use. The Kruskal–Wallis test and Mann–Whitney test were used to test for differences in the medians between groups. Correlation between SEMCD-6 and HRQoL scale scores was investigated using Spearman’s correlation coefficient. Linear regression analysis was carried out to assess the association of factors with each of the SEMCD-6 and HRQoL scale scores. The significance level was set at a p value < 0.05. Internal consistency reliability for all scales was calculated using Cronbach’s alpha.
A total of 301 individuals were interviewed within 7 months from November 2016 to June 2017. Eighteen patients refused to participate, giving a response rate of 94%. After excluding non-responses, the final sample was 283. The majority of patients were aged between 30 and 60 years (61.1%), and the patients’ mean age was 50.3 ± 16 years. Most participants were male (61.8%), married (74.2%), unemployed (79.9%), and living with their families (94.3%). Nearly half (44.5%) of the patients were categorised with a higher educational level (i.e. university level and above) and with less than 2000 New Israeli Shekel (NIS) monthly income (50.9%) (Table 2).
In terms of their medical aspect, the length of dialysis ranged from 6 months to 252 months, with the majority at less than 48 months (72.4%) and three dialysis sessions weekly (88%). Regarding the dialysis sessions’ duration, about half of the patients took more than 3 hours (51.6%). Eighty-seven percent of patients did not have a kidney transplant history. Most had at least one chronic co-morbid disease (83.3%) and were on regular medications (78.4%) (Table 2).
The mean and median of the SEMCD-6 were 38.70 ± 11.1 and 39 (interquartile range: 31–47), respectively. Table 3 presents the factors associated with the SEMCD score. We found a significant association between age and SEMCD score (p value< 0.05), where younger ages had better scores. There was also a significantly better SEMCD score with graduated patients than more uneducated ones, and the same for those who live alone, patients with high income, and employed patients. Other sociodemographic factors, such as BMI, residency, marital status, and smokers, were not significantly associated with SEMCD score (p value > 0.05).
Patients without any co-morbid conditions or low rates of co-morbid conditions in patients with HD and a low number of chronic medications were significantly associated with a high SEMCD score (p value < 0.05). Other clinical factors such as dialysis vintage, dialysis per week, dialysis duration, and history of kidney transplant were not significantly associated with SEMCD score (p value > 0.05).
EQ-5D index values and EQ-VAS score
The mean and median of the EQ-5D index value were 0.46 ± 0.35 and 0.53 (interquartile range, 0.22–0.74), respectively. The mean and median of the EQ-VAS were 65.5 ± 21.9 and 70 (interquartile range, 50–80), respectively. Table 4 presents the factors associated with EQ-5D score. We found that factors such as age, education level, income, living status, occupation, dialysis session duration, transplantation history, total number of co-morbid diseases, and number of medications were significantly associated with EQ-5D score (p value < 0.05). Correlation tests revealed moderately positive association between the EQ-5D score and the EQ-VAS (r = 0.486, p value < 0.001) and SEMCD-6 (r = 0.497, p value < 0.001).
Multiple linear regression analysis
The multiple linear regression model of the SEMCD-6 scale is shown in Table 5. Age, education level, income, living status, occupation, total number of co-morbid diseases, and number of medications were included as independent variables. Table 5 shows that age, living status, and number of co-morbid diseases were negatively associated with SEMCD-6 score (β = − 2.66, p = 0.016; β = − 5.71, p = 0.033; β = − 1.84, p = 0.006, respectively). More specifically, being younger, living alone, and having a low number of co-morbid diseases were associated with a higher SEMCD-6 score.
The multiple linear regression model of the HRQoL scale is shown in Table 6. Age, education level, income, living status, occupation, dialysis session duration, transplantation history, total number of co-morbid diseases, number of medications, and SEMCD-6 score were included as independent variables once interactions such as EQ-VAS were excluded. As shown in Table 6, there is a positive association between the educational level and the SEMCD-6 score with the QoL score (β = 0.05, p = 0.017; β = 0.01, p < 0.001, respectively), while there is a negative association between the number of co-morbid diseases and the QoL score (β = − 0.07, p = 0.001). More specifically, patients with a high education level, greater levels of self-efficacy, and a low number of co-morbid diseases were associated with a higher QoL score.
In the current study, we examined HD patients on different levels demographically and clinically using SEMCD-6 scores, EQ5D scores, and EQ-VAS scores. We found a significant relation between SEMCD-6 score and age, education status, monthly household income, living status, occupation, total chronic co-morbid diseases, and regular medications. There was a significant relation between age, monthly household income, occupation, total chronic co-morbid diseases, and regular medications and EQ-VAS score. Moreover, a significant relation was found between age, education status, monthly household income, living status, occupation, current smoking status, dialysis session duration, transplantation history, total chronic co-morbid diseases, and chronic medications and EQ-5D score.
In the current study, the mean of SEMCD-6 was 38.70, SD = 11.06. Surprisingly, the mean score was found to be a little bit lower in comparison to that in a previous American study’s mean and SD = 48.66 (10.79) . The results of our study showed that a younger age is significantly associated with better self-efficacy. This finding supports previous research in this area that links age and self-efficacy . It is important to note that the mean age of participants for the American study’s was 50.9 years  which is considered close to the mean age in our sample.
Employed patients with a higher monthly income are strongly associated with a better self-efficacy score. This result is in accordance with a previous Turkish study  and Callaghan’s study . In the current study, we found that patients with more education have a better SEMCD-6 score. This result is in agreement with results obtained by Curtin et al. . It is also consistent with Kav et al.’s research, which studied the self-efficacy of diabetic patients .
We obtained from our results a significant relation between living status and SEMCD-6 score. People who live alone have better self-efficacy than those who live with their families. This result seems to be consistent with another Turkish study, which found the same result in diabetic patients . It is interesting to note that in this study, self-efficacy was inversely associated with the number of co-morbid diseases and medications. Patients who have no or fewer medications or co-morbid diseases have better self-efficacy. However, this result has not previously been described. This is an important issue for future research.
In our study, the EQ-5D score showed a mean of 0.46 (SD = 0.35), which is lower than other studies’ means, such as a Swiss study that had a mean of 0.62 (SD = 0.30) , an English and Welsh study with a mean of 0.60 (SD = 0.28) , and a Japanese study with a mean of 0.75 (SD = 0.17) .
In the present study, we found a significant association between higher QoL and younger age. This finding is in agreement with that obtained by an Iranian study . This contrasts with the study of O’Reilly et al., which explained that HRQoL gets better when the patient is older in age . A higher education level was associated with better QoL. This result is consistent with data obtained in a previous Iranian study . A study in the United Arab Emirates, which used another score for QoL measurement, matches our result . Our study revealed that the total number of co-morbid diseases was inversely associated with QoL. This finding is in agreement with two Iranian studies that showed a strong relation between the number of co-morbid diseases and poor QoL [54, 55].
One interesting finding associated with the dialysis session duration is that QoL is better with longer session duration. Dialysis adequacy may be the answer because shorter dialysis session may result in inadequate dialysis . This suggestion reflects those of Adas et al.  who also found that most patients in Palestine were inadequately dialyzed and a high percentage of the HD patients did not achieve the targets. This result seems to be consistent with other research, which found that initiating HD at longer session duration is associated with less mortality . This result is also in agreement with results obtained by a Belgian study that found a longer duration improves the well-being of patients due to more removal of solutes from patients in the interdialytic period . In our data, high income was associated with better QoL, which supports a previous Iranian study by Pakpour et al. . Another study was conducted by Marinovich et al. , which further supports the association between high income and better QoL.
Another important finding was that patients who have undergone kidney transplantation have higher QoL. This result is in accordance with a recent study by Fiebiger et al. . This corroborate the ideas of Laupacis et al. , who suggested that renal transplantation improves the HRQoL of patients on dialysis.
The most important finding in our study was the significant relation between self-efficacy and QoL. Patients with a higher self-efficacy score had better QoL. This result is in accordance with a previous Taiwanese study by Tsay and Healstead . It is also in agreement with Lev and Owen’s research , which showed that QoL is positively related to self-efficacy.
Strength and limitations
The key strengths of this study are the collection of data from all dialysis centres in the West Bank, which means a relatively large sample, as well as the performance of direct interviews with the patients to collect more realistic and valid information. However, no studies have been performed to calculate the self-efficacy and QoL of HD patients in Palestine. This is the first study to evaluate the association between SEMCD-6 and QoL among HD patients in Palestine.
The study is limited by a number of restrictions that should be discussed. The first limitation is that the generalisability of the study’s results to other CKD patients is reduced, because we used a convenience sampling method. The second limitation is that the cross-sectional design precludes any statements about causal associations between study variables. The third limitation is that related to selection bias that may have been introduced into the sample due to the non-response rate among eligible participants, inclusion or exclusion patients according to eligible criteria, or due to the non-random selection of initial participants. Additionally, our result may be confounded by survivor bias, e.g. those patients who live alone with a poor SEMCD score may die very quickly without help from their family and some degree of survivor bias cannot be excluded.
This study assessed factors associated with impaired self-efficacy and HRQoL in HD patients. The results of this investigation show that impaired self-efficacy was associated with the elderly, patients living with family, and patients with a high number of co-morbid diseases. Furthermore, this study found that the worst HRQoL was associated with patients with low education level, lower levels of self-efficacy, and a high number of co-morbid diseases. The results of this investigation show that assessment of the self-efficacy of patients receiving HD is crucial in clinical practice. Doctors may require self-efficacy trainings to strengthen HD patients’ trust in carrying out self-care behaviours, which can lead to improvement in their QoL. Future studies that examine the effect of dialysis adequacy by calculating the Kt/V or urea reduction ratio on QoL in HD patients are needed.
Body mass index
Five-Level EuroQol Five-Dimensions
EuroQol visual analogue scale
End-stage renal disease
Health-related quality of life
New Israeli Shekel
Self-Efficacy for Managing Chronic Disease Six-Item Scale
The United States dollar
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The authors would like to thank An-Najah National University for providing the opportunity to conduct this study.
Availability of data and materials
The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
Ethics approval and consent to participate
Ethical approval was obtained for the study from the local health authorities that had control and rule over the local study population and from An-Najah National University’s Ethics Committee. We described the interview content to the respondents, and before the start of the interview, we obtained verbal consent from each participant.
The authors declare that they have no competing interests.
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Additional file 1:
Study questionnaires. This is the final version of the English and Arabic version that was used to obtain data which will help to address the factors associated with self-efficacy and health-related quality of life (HRQoL) among haemodialysis (HD) patients in Palestine. (DOCX 366 kb)
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Mousa, I., Ataba, R., Al-ali, K. et al. Dialysis-related factors affecting self-efficacy and quality of life in patients on haemodialysis: a cross-sectional study from Palestine. Ren Replace Ther 4, 21 (2018). https://doi.org/10.1186/s41100-018-0162-y
- Chronic kidney disease
- Self-efficacy for managing chronic disease
- Health-related quality of life