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Effect of Renal Transplantation on Health-Related Quality of Life in Patients with End-Stage Renal Disease; A Quasi-Experimental Study

AUTHORS

Razieh Sadat Mousavi-Roknabadi 1 , Faezeh Ershadi 1 , Negin Hadi 2 , * , Jamshid Roozbeh Shahroodi 3 , Zahra Shayan 4 , Soheila Keshavarz 1 , Halimeh Raeisi Sarbizhan 1 , Afsaneh Roozrokh 5

1 Community Medicine Department, Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran

2 Community Medicine Department, Neuro-Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran

3 Department of Internal Medicine, Nephrology Ward, Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran

4 Trauma Research Center, Department of Community Medicine, The Medical School, Shiraz University of Medical Sciences, Shiraz, Iran

5 Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran

How to Cite: Mousavi-Roknabadi R S, Ershadi F , Hadi N, Roozbeh Shahroodi J, Shayan Z, et al. Effect of Renal Transplantation on Health-Related Quality of Life in Patients with End-Stage Renal Disease; A Quasi-Experimental Study, Nephro-Urol Mon. Online ahead of Print ; 11(2):e79497. doi: 10.5812/numonthly.79497.

ARTICLE INFORMATION

Nephro-Urology Monthly: 11 (2); e79497
Published Online: May 6, 2019
Article Type: Research Article
Received: May 21, 2018
Revised: January 31, 2019
Accepted: March 16, 2019
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Abstract

Background: Renal transplantation is one of the best modalities to lengthen the life expectancy of patients with end-stage renal disease (ESRD). However, no sufficient documents exist regarding the effects of renal transplantation on the health-related quality of life (HRQOL) especially in Iranian population.

Objectives: This study aimed to determine the possible influence of renal transplantation in different scales of HRQOL in southern Iran.

Methods: This Quasi-experimental study was carried out with 120 patient candidate for renal transplantation (Apr 2012 - Jan 2014). Using the general SF-36 questionnaire, HRQOL of the patients 1 week before and 3 months after the transplantation was evaluated. All data were analyzed statistically using descriptive and analytical tests (α = 0.05).

Results: Seventy-eight patients (65%) were male. The mean (SD) of the age was 38.92 (13.259) years. HRQOL and its eight scales were significantly different before and after the transplantation (P < 0.001). There was a significant difference between general perception of health and primary school, as well as diploma (P = 0.008). Other demographical factors such as age, gender, marital status and type of donor had no impact on HRQOL, statistically. There was no correlation between HRQOL and the length of facing the disease, except in the subgroup of role limitation due to physical problems (P = 0.01).

Conclusions: The study showed that renal transplantation has sufficient credibility in improvement of HRQOL in patients with ESRD. Moreover, continuous enhancement of education level and public knowledge might be as effective as development of medical serving systems in maintaining and achieving greater improvement in HRQOL.

Keywords

End-Stage Renal Disease Renal Transplantation Health-Related Quality of Life

Copyright © 2019, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

1. Background

Chronic kidney disease (CKD) is a global health issue (1), and is defined by malfunctioning of the kidney, usually associated with declined glomerular filtration rate over a period of months or years (2). CKD is a major and considerable clinical problem which leads to end-stage renal disease (ESRD) over time, and has become a significant social and economic problem worldwide (1, 3). Studies showed that the patients with ESRD, who are on dialysis have poor quality of life (QOL) in compared with the general population, as well as patients with other chronic diseases (4, 5). Several studies, for instance Hadi et al. (6), in Iran Esposito et al. (7), in Italy Ronai et al. (8), in Hungary showed that patients with CKD who underwent dialysis, suffered from poor health and QOL. Disability in patients undergoing hemodialysis or peritoneal dialysis can result in increased risk of inflammation, malnutrition, anemia, sleep-related problems, obstructive sleep apnea, unemployment, as well as depression. These patients usually experience chronic tiredness, higher pain susceptibility, major depression (as a common psychiatric sequel of CKD), nervousness, sadness and limitation of daily physical activities. On the other hand, defective physical performance, protein-energy wasting and abnormal body composition can be causes of increased risk of hospitalization and morbidity in these patients (7-10), which can affect the patients’ QOL.

In patients with ESRD, renal transplantation (RT) is considered as the best treatment with a survival advantage and achieving improved outcomes at a lower cost. It can improve a patient’s QOL in terms of physical and psychological function in comparison with dialysis, significantly (4, 11). Patients who underwent RT live much longer, nearly 15 - 20 years more than patients without transplantation (12). Health-related quality of life (HRQOL) has become an important indicator of effective patient treatment and graft survival rates in accompaniment with patient and graft survival rates (4). RT has been performed for 50 years in Iran (13, 14), but to our knowledge, few studies have evaluated HRQOL in patients with RT as a determinant of long-term clinical outcomes, and all of them revealed lower physical HRQOL with mortality, and also they focused on the obvious effect of transplantation in decreasing the substantial number of death and increasing life expectancy in the patient with ESRD, but the feeling of well-being and satisfaction, which have more significant influence on daily life is less considered (15).

The general SF-36 questionnaire is a useful tool in assessing and comparing the HRQOL in patients with ESRD and RT (16-18).

2. Objectives

The current study aimed to evaluate the various aspects of HRQOL beside the related variables in the patients who underwent RT as the choice of treatment, using general SF-36 questionnaire. So far, such a study has not been conducted in Shiraz hospitals, as the main referral center of RT in southern Iran.

3. Methods

3.1. Study Design and Population

This was a quasi-experimental study from April 2012 to January 2014 on adult patients with ESRD, all of whom were candidates for RT at Shiraz Organ Transplantation Center (STRC) in Namazi hospital, the largest university-affiliated hospital in southern Iran, with approximately 24000 admission in 29 wards, annually.

3.2. Participants

The inclusion criteria were all of adult patients (age more than 18 years), candidate and underwent RT due to ESRD, who were admitted in Shiraz Namazi hospital transplantation ward. All patients who did not agree to complete the questionnaire form, uncompleted forms or refused signing the written consent form were excluded from the study.

3.3. Sample Size

Using Medcalc software for Windows, 120 patients were calculated as necessary for participating in this study (α = 0.05, β = 0.2) (15).

3.4. Evaluation Tools

The general SF-36 questionnaire was used, which is considered as a popular tool for measuring HRQOL in patients with ESRD, and comparing different treatment in these patients as well (4, 15-17). It consists of eight scales including physical functions (10 questions), social functions (2 questions), role limitation due to physical problems (4 questions), role limitations due to emotional problems (3 questions), mental health (5 questions), energy and vitality (4 questions), bodily pain (2 questions), and general perception of health (5 questions). The scores of scales were converted and summed from 0 (lowest HRQOL and poor functioning) to 100 (highest HRQOL and good functioning). A mean score was measured for each scale, ranging from 0 to 100, with higher scores suggesting a better outcome (3). The Persian version of SF-36 questionnaire was translated to Farsi and have been confirmed in Iranian population. Also, it adapted and the reliability and validity were calculated by Montazeri et al. (19). Demographical information such as (age, gender, marital status, education, length of facing disease and types of donation including cadaver, living-unrelated, living-related were collected as well.

3.5. Study Protocol

The participants were given two SF-36 questionnaires 1 week before and 3 months after RT, when they came for follow up to determine the present HRQOL. The patients were asked to fill out the form, otherwise, the questionnaire was filled out the by face to face interview by one of the researchers. The difference of QOL before and after RT, as well as all other eight scales was compared in different types of donation group, different educational levels, different genders and different marital statuses.

3.6. Statistical Analysis

All analyses were performed using the Statistical Package for Social Sciences (SPSS Inc., Chicago, Illinois, USA) version 23.0. Since physical functions, social functions, role limitation due to physical problems, role limitations due to emotional problems, mental health, energy and vitality, bodily pain and general perception of health were not parametric by means of Kolmogorov-Smirnov test, Wilcoxon test was used to compare the difference of HRQOL before and after RT. Mann-Whitney U test was used to compare the difference of HRQOL before and after the transplantation in different genders and marital statuses. Moreover, the Kruskal Wallis test was used to compare HRQOL among different groups of education and types of donation. Pearson’s correlation was employed to determine the correlation between HRQOL before and after the transplantation and age, as well as length of facing the disease. The results are presented as mean (standard deviation) (SD) for continuous variables, and summarized in number (percentage) for categorical ones. Two-sided P value < 0.05 and confidence interval (CI) of 95% were considered as statistically significant.

4. Results

Overall, 120 patients participated, from which 78 (65%) were male. The mean (SD) of age was 38.92 (13.26) (range, 12 - 70) years and 84 patients (70%) were married. Most of them (34.4%) had a high school diploma, and about 63% of them received kidney from cadaver-donor. The mean (SD) of duration of facing the disease was 3.91 (3.74) (range, 0.3 - 20) years (Table 1).

Table 1. Patients’ Characteristics
VariablesValues
Age, y
Mean ± SD38.92 ± 13.26
Minimum - Maximum12 - 17
Gender, No. (%)
Male78 (65)
Female42 (35)
Marital status, No. (%)
Single36 (30)
Married84 (70)
Educational level, No. (%)
Illiterate9 (7.6)
Primary school33 (27.7)
High school23 (19.2)
Diploma41 (34.4)
Bachelor13 (10.8)
Duration of facing the disease, mean ± SD3.91 ± 3.74
Types of donation, No. (%)
Cadaver76 (63.3)
Living-unrelated21 (17.5)
Living-related22 (18.3)

As shown in table 2, HRQOL was significantly higher after transplantation in all eight scales (p < 0.0001). There was no statistical significance between difference of HRQOL before and after transplantation of all 8 scales among neither different genders nor different marital statuses. Difference of HRQOL was not statistically important among different educational levels in all 8 scales too, except for general perception of health (P = 0.037). Since the data were nonparametric, levels of education were compared two by two in regards of general perception of health, using the Wilcoxon test, which showed higher HRQOL in diploma rather than primary school level (P = 0.008). Moreover, there were no significant differences between HRQOL before and after transplantation and types of donor (Table 3). Furthermore, there was no correlation between difference of HRQOL and age, as well as the length of facing the disease except in subgroup of role limitation due to physical problems (P = 0.01) (Table 4).

Table 2. Comparing Eight Health-Related Quality of Life Scales before and after Renal Transplantation According to Age and Marital Statusa
Scales of Quality of LifeBefore/After TransplantationGenderMarital Status
Before TransplantationAfter TransplantationP ValueMaleFemaleP ValueSingleMarriedP Value
1Physical function49.8854.99 < 0.0001b57.7565.600.23655.4162.670.136
2Social function53.7348.61 < 0.0001b57.6765.750.21660.4460.520.990
3Role limitation due to physical problems26.7339.51 < 0.0001b57.6956.710.21061.9459.880.293
4Role limitation due to emotional problems25.5646.735 < 0.0001b59.0763.150.53161.9159.890.765
5Mental health30.0454.09 < 0.0001b60.6960.140.93459.6360.860.858
6Energy and vitality24.37555.64 < 0.0001b59.6962.000.72761.3160.140.865
7Bodily pain46.5847.83 < 0.0001b59.1463.020.55753.3163.570.756
8General perception of health12.5964.82 < 0.0001b59.9461.520.81266.5557.900.209

aValues are expressed as mean rank.

bStatistically significant.

Table 3. Comparing Eight Health-Related Quality of Life Scales Before and after Renal Transplantation According to Educational Status and Types of Donationa
Scales of Quality of LifeEducational StatusTypes of Donation
Primary SchoolHigh SchoolDiplomaBachelorP ValueCadaverLiving-UnrelatedLiving-RelatedP Value
1Physical function48.3966.9753.559.530.17156.0968.1165.640.250
2Social function54.5462.5248.8966.340.20461.12551.564.830.387
3Role limitation due to physical problems52.6068.2149.0660.650.09256.7664.1167.400.347
4Role limitation due to emotional problems54.2261.6552.5157.260.7155.19763.8473.350.781
5Mental health53.8655.2652.9268.1920.48859.4255.566.780.544
6Energy and vitality53.81856.4552.4167.800.48457.7661.566.520.571
7Bodily pain53.7161.2854.8551.840.78658.2855.8670.520.288
8General perception of health45.0157.2661.53070.1530.0367b58.7954.9569.640.328

aValues are expressed as mean rank.

bStatistically significant.

Table 4. Comparing Eight Health-Related Quality of Life Scales Before and after Renal Transplantation According to Age and Length of Facing the Disease
Scales of Quality of LifeAgeLength of Facing the Disease
Pearson CorrelationP ValuePearson CorrelationP Value
1Physical function0.030.670.020.81
2Social function0.050.950.030.73
3Role limitation due to physical problems0.030.700.220.01a
4Role limitation due to emotional problems-0.040.640.130.15
5Mental health0.030.730.060.48
6Energy and vitality-0.110.190.010.87
7Bodily pain0.010.980.030.74
8General perception of health-0.080.340.040.59

aStatistically significant.

5. Discussion

In the present study, we evaluated the various aspects of HRQOL beside the related variables in the patients who underwent RT using the general SF-36 questionnaire. Also, the correlation of socio-demographic factors such as age, gender and educational status were determined as well. Tayebi et al. in Tehran, Iran used a different questionnaire to assess QOL of RT patient called Kidney Transplantation Questionnaire (KTQ-25), and they showed significant relationship between QOL score and gender, cause of ESRD, occupation and economic satisfaction (20). In another study, Perez San Gregorio et al. used a structured interview and SF-36 questionnaire, Euroqol-5D (EQ-5D) Health questionnaires and end-stage renal disease symptom checklist-transplantation module (ESRD-SCL). Their results showed that HRQOL in RT patients improved with the course of time in 4 areas: physical functioning, psychological and mental health, execution of daily tasks, and subjective perception of own state of health (15).

The current study showed that HRQOL significantly improved after RT in patients with ESRD in all 8 scales. Likewise, Mini et al. in India showed that transplanted patients had better HRQOL in only physical function, psychological state, execution of daily tasks, and subjective perception of health (21). Lim et al. in a multicenter, 9-year observational cohort study in Korea, analyzed the data of 175 patients with RT. They found that at the end of 2-years follow up all QOL scores using the SF-36 questionnaire and chronic kidney disease targeted score were significantly increased compared to baseline values. Also, both physical and mental scale scores were improved after transplantation (4). Rambod et al. also showed that the mean score of QOL in patients with RT were significantly better when compared with hemodialysis patients in Iran in their study. They concluded that RT has enough efficacy to improve the patients’ QOL (22).

In this study, most of the participants were male and there was no significant difference between gender and HRQOL. In contrast, Tayebi et al indicated a significant higher QOL in males (P < 0.0001) (20). Also, other studies in region of Croatia, Netherlands and France had the same results (23-25). Likewise, Hadi et al. showed that women with chronic renal failure had worse conditions in all aspects, except general health and social function (6). Overall, it seems that the general tendency of various surveys is toward the dominancy of the positive effect of the male gender in the concept of HRQOL, although our results didn't support this issue. The reason of this finding may be due to psychological characteristics of the male gender and emotional dominance of females in their behavior and life status.

Our result also showed no relationship between age and HRQOL, but in some studies like Prihodova et al.'s longitudinal study, younger age was associated with higher physical HRQOL. Likewise, older age and lower efficacy in getting support from family and friends was associated with higher mental HRQOL (26). However, another study in Croatia showed that the patients under the age of 65 years had a better score of HRQOL and demonstrated that age is the only statistically significant predictor of both physical and mental component in HRQOL (24). Therefore, it is recommended that further investigation should be designed for finding the exact relationship between age and HRQOL. Moreover, all 70% of our patients were married, but there was no significant relationship between HRQOL and marital status, nevertheless a French survey mentioned that living alone has negative effect on HRQOL (25).

Also, in the current study, the correlation of educational levels and HRQOL was investigated, and the results showed no significant difference, except between general perception of health and education levels. More advanced analysis revealed a significant difference between two subgroups of education and HRQOL; primary school and diploma. Germin-Petrović et al. showed better HRQOL in higher educational level (24). Another survey by Gentile et al. revealed that low educational degree had an association with lessening HRQOL (25). These studies are consistent in providing incontrovertible impact of education on HRQOL in transplanted patients, this is perhaps due to stronger follow up after transplantation and their realistic approach, which precedes a lower expectation from their conditions. So the focus on training and having educational practice for transplanted patients to improve the QOL is recommended.

The results showed no significant relationship between the duration of facing disease and HRQOL, except in subgroup of role limitation due to physical problems. Also, a study reported that in diabetic patients, long duration of dialysis, as well as recent critical illness and hospitalization might decrease the scores HRQOL questionnaires (25). It seems that much research is required to establish the exact impact of length of facing disease on HRQOL.

Another item that was studied, was the type of organ transplantation, which was divided to three groups: cadaveric, unrelated living donor, related living donor. Results showed that in solid-organ transplant recipients, HRQOL improved most significantly over the first year after transplantation and remained relatively stable afterwards (26). Our results showed that related-living donor group had better HRQOL than other groups, although statistical analysis showed no significant differences among these three groups. Similarly, Arogundade et al. showed that different manners of donation had no significant difference in QOL (27). So, it seems that there is not any difference among various type of donors, so we can benefit from cadaveric donors in extended space.

5.1. Limitations and Suggestions

The population of our study was limited and some of the patients forgot their follow up visit, so an attempt was made to contact them in order to obtain the information. Some of the patients have low educational level and it took a great deal of time to explain the questionnaire to them, and in illiterate patients we had to interview them. Most of complications of transplantation’s rejection, which affect HRQOL occurred within two to three months after transplantation, but this time is varied in different individuals. Moreover, late complications of rejection occur after 1 to 2 years. So, longer follow up is necessary to determine the exact effect of transplantation on HRQOL. It is recommended to conduct universal cost-effectiveness studies in a larger sample size for more reliability and generalizability to determine the role of RT in HRQOL of patients with ESRD.

5.2. Conclusions

HRQOL could be improved significantly after transplantation in all 8 scales. But no noticeable correlation was found between HRQOL and some demographic factors (gender, age, marital status, and type of transplantation donor), except relationship between level of education in two subgroups of primary school and diploma with general perception of health, as well as relationship between limitation due to physical role and length of disease. Moreover, continuous enhancement of education level and public knowledge might be as effective as developing medical serving systems in maintenance and achieving greater improvement in HRQOL.

Acknowledgements

Footnotes

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