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Breast Care (Basel). 2009 December; 4(6): 379–386.
Published online 2009 December 28. doi:  10.1159/000266759
PMCID: PMC2942001

Language: English | German

Quality of Life after Autologous Peripheral Blood Stem Cell Transplantation and High-Dose Chemotherapy in High-Risk Breast Cancer Patients

Summary

Background

As long-term survivors of breast cancer after autologous peripheral blood stem cell transplantation (ASCT) are becoming more numerous, studies addressing the issue of long-term follow-up are necessary. In this study, we report on the quality of life (QOL) after ASCT and high-dose chemotherapy (HDCT).

Patients and Methods

The QOL questionnaire version 3.0 by the European Organization for Research and Treatment of Cancer (EORTC QLQ-C30 version 3.0) was filled in by patients and healthy controls at 5 time points. After obtaining the results, we analyzed the correlation between QOL and the effect factors.

Results

Some functions got significantly worse, and some symptoms got more serious after ASCT and HDCT. However, most of them improved with time and were comparable to the healthy controls after 5 years. QOL was in part related to age, tumor characteristics, educational level, marriage status, and income.

Conclusions

Evaluating QOL allows medical workers to fully understand a patient's state of health, and aid the estimation and selection of clinical treatment methods as well as improve recovery.

Key Words: Quality of life, Autologous peripheral blood stem cell transplantation, High-risk breast cancer

Abstract

Zusammenfassung

Hintergrund

Die steigende Anzahl langzeitüberlebender Brustkrebspatienten nach autologer peripherer Stammzelltransplantation (autologous peripheral blood stem cell transplantation, ASCT) macht Studien zum Langzeit-Follow-up notwendig. Die vorliegende Studie befasst sich mit der Lebensqualität nach ASCT und HochdosisChemotherapie (HDCT).

Patienten und Methoden

Der Lebensqualitätsfragebogen Version 3.0 der European Organization for Research and Treatment of Cancer (EORTC QLQ-C30, Version 3.0) wurde von sowohl Patienten als auch gesunden Kontrollpersonen zu 5 verschiedenen Zeitpunkten ausgefüllt. Anhand der Daten wurde die Korrelation zwischen Lebensqualität und Einflussfaktoren analysiert.

Ergebnisse

Bei einigen Funktionen war eine signifikante Verschlechterung zu beobachten, und bestimmte Symptome verschlimmerten sich nach ASCT und HDCT. Die meisten besserten sich jedoch im Laufe der Zeit und entsprachen nach 5 Jahren dem Status der gesunden Kontrollpersonen. Die Lebensqualität war zum Teil mit Alter, Tumoreigenschaften, Bildungsstand, Ehestand und Einkommen korreliert.

Schlussfolgerungen

Die Bestimmung der Lebensqualität macht es dem medizinischen Personal möglich, den Gesundheitszustand eines Patienten ganzheitlich zu erfassen, wodurch die Einschätzung und Auswahl klinischer Behandlungmethoden unterstützt und die Genesung verbessert wird.

Introduction

Breast cancer remains one of the most common malignancies affecting women's health. Primary breast cancer patients with metastases in >10 axillary lymph nodes, or in >4 axillary lymph nodes and negative estrogen status, or with locally advanced disease (high-risk breast cancer patients) always have a worse prognosis after conventional chemotherapy. High-dose chemotherapy (HDCT) followed by autologous peripheral stem cell transplantation (ASCT) is increasingly being used in malignant lymphoma, Hodgkin's disease, high-risk breast cancer, and so on [1, 2]. As experience with ASCT has become more widespread and the number of patients who have survived for longer periods after the procedure has increased, health-related quality of life (QOL) after treatment is receiving increased attention [3, 4]. In recent years, some studies examined the impact of HSCT on the QOL. Highdose treatment and HSCT are associated with high physical and emotional distress levels and reduced QOL [5, 6]. However, there are several studies about bone marrow transplantation but very few about HDCT followed by ASCT [7, 8]. Also, data published thus far are limited by short follow-up [9,10,11]. The objectives of this study are: i) to examine the effects of ASCT on QOL; ii) to determine the relationship between long-term QOL and the interval from transplantation; iii) to analyze the correlation between QOL and effect factors (age, tumor characteristics, educational level, marriage, income); iv) to discuss how the QOL of cancer patients may be improved [12,13,14].

The European Organization for Research and Treatment of Cancer (EORTC) quality of life questionnaire (QLQ-C30) was translated into many languages and used in various countries to evaluate QOL of cancer patients. As a core measure, it can be used to evaluate lymphoma, lung cancer, breast cancer, and so on. In this study, we chose EORTC QLQ-C30 version 3.0 as a study instrument [15].

Patients and Methods

Patients

The study population consisted of 61 patients who had received a histopathologically confirmed diagnosis of high-risk breast cancer between October 1999 and June 2004, and to whom the following applied: i) histopathologically confirmed diagnosis of primary breast cancer following radical surgery; number of positive axillary lymph nodes >4 and estrogen receptor-negative, or number of positive axillary lymph nodes >10 with no distant metastasis; ii) indication for treatment with ASCT and HDCT; iii) basic perceptivity and ability to communicate. 50 healthy persons were randomly chosen as controls.

Instrument and Data Collection

EORTC QLQ-C30 version 3.0 (table (table1)1) and a scoring manual were used to determine QOL. EORTC QLQ-30 is a 30-item questionnaire for assessing the QOL of cancer patients. It consists of 5 functioning scales (physical, role, emotional, cognitive, social), a global health and QOL scale, 3 symptom scales (fatigue, nausea/vomiting, pain), and 6 simple items (dyspnea, sleep disturbance, loss of appetite, constipation, diarrhea, financial impact). The scoring process includes calculating raw scores (RS), converting to normal scores, dealing with missing items, and explaining the results [16]. First, we obtained the RS according to each item and the patients’ options: RS = (I1+I2+I3+ … +In)/n. Then, we linearly transformed them in such a way that all scales range from 0 to 100: functioning scales score = {1-(RS-1)/range}×100, global health and QOL scale, symptom scales, and 6 simple items score = {(RS-1)/rangej×100. Therefore, a high score on the functional scale represents a high level of functioning, but a high score for a symptom scale and single item represents a high level of symptomatology problems. A global health and QOL scale can be used as an overall measurement.

Table 1
EORTC QLQ-C30 raw scores (RS) calculation

Methods and Procedures

The procedure of HDCT followed by ASCT to cure high-risk breast cancer involved the following: autologous peripheral stem cell mobilization using CAF (cytoxan + epirubicin + fluorouracil) with granulocyte colony-stimulating factor (G-CSF) 5 μg/kg + granulocyte macrophage colony-stimulating factor (GM-CSF) 5 μg/kg; HDCT pretreatment with cytoxan 60 mg/kg days 1 and 2 + etoposide 350 mg/m2 days 1-3 + carboplatin 1,000 mg/m2 day 1; stem cell are transfused back 2 h after pretreatment.

Patients filled in the EORTC QLQ-C30 at 5 time points: 1 month before transplantation (T1), 3 months after transplantation (T2), 1 year after transplantation (T3), 3 years after transplantation (T4), and 5 years after transplantation (T5). Generally, patients filled in the questionnaire by themselves. Patients who could not read, had lost their glasses, had a disability involving the fingers, or were physically weak, could be assisted by the doctors when completing the questionnaire but doctors could not make any suggestions. Patients who were unable to come to hospital to fill in the questionnaire (living far away from the hospital, being physically weak, or other reasons), completed it over the telephone.

Fifty persons (35-65 years old) were randomly chosen as healthy controls to fill in the EORTC QLQ-C30; this procedure was completed on average 5 years after transplantation (2006) in order to reduce the error caused by social status.

Data Analysis

SPSS13.0 was used for data analysis. Differences between groups were tested with ANOVA and t-test. Correlation was analyzed by Spearman correlation analysis. Statistical significance was considered at p<0.05.

Results

Patient Information

Patient and healthy control characteristics were collected and recorded (table (table2).2). Some of the 61 patients did not finish the questionnaire because of death, relapse, or because they were lost to follow-up. The number of patients at the 5 time points were as follows: T1 = 61 (100%), T2 = 61 (100%), T3 = 57 (93.4%), T4 = 48 (78.7%), T5 = 42 (68.9%).

Table 2
Characteristics of patients and healthy controls

Data Statistics Results

Table Table33 shows results of the statistical analysis of the patient and control data. We compared T1 to T2, T2 to T3, T4 and T5, and T5 to the controls. Figure Figure11 depicts the scores of the functioning scales and the global health/QOL scale. Figure Figure22 depicts the scores of the symptom scales and the 6 single items. From the 2 figures we can directly derive the tendency of the change. Table Table44 shows the correlation between QOL and some effect factors.

Fig. 1
Mean scores of the functioning scales and the global health/QOL scale at the 5 time points. PF: Physical function; RF: role function; EF: emotional function;CF: cognitive function; SF: social function;GH: global health.
Fig. 2
Mean scores of the symptom scales and the 6 single items at the 5 time points. FA: Fatigue; NV: nausea/vomiting; PN: pain; DY: dyspnea; SL: sleep disturbance; AP: loss of appetite; CO: constipation; DI: diarrhea; FI: financial impact.
Table 3
Mean scale and item scores of EORTC QLQ-C30 (± standard deviation, SD)
Table 4
Correlation analysis between effect factors and the quality of life (QOL) scores.

Functioning Scales and Global Health/QOL Scale Scores

The change tendency of the functioning scales and the global health/QOL scale scores are shown in figure figure1.1. Mostly, scores were at their lowest at T2 (lower than T1), and with time they increased nearing the scores of the healthy controls. However, there still were differences between healthy controls and patients at T5. The results of the statistic analysis indicated the following. Physical function was not significantly different between pretransplant and posttransplant, but patients at T5 were still statistically different from controls (p = 0.000). Emotional function was worse after transplantation than before (p = 0.000) but increased 3 years after transplantation (p = 0.000); after 5 year a difference remained to the healthy controls (p = 0.011). Cognitive function was impaired after transplantation (p = 0.002), then got gradually better and was same as healthy controls after 5 years. Role, social functions, and global health were not significantly different after transplantation.

Symptom Scales and Six Single Items Scores

Figure Figure22 shows the change tendency of the symptom scales and the 6 single item scores. Mostly, the scores were at their highest at T2, which means symptoms posttransplant were more serious than pretransplant, and with time they improved and neared the healthy controls. However, some problems were not resolved after T5. The results of the statistic analysis indicated that fatigue symptoms were more serious after transplant (p = 0.000), and while significantly relieved at T5 (p = 0.009) were still different to the healthy controls (p = 0.031). Nausea and loss of appetite were more conspicuous at T2 (p = 0.005, p = 0.009), but were significantly improved after T3 (p = 0.011) and comparable to controls at T5. Pain was a serious problem which constantly impaired QOL and was not resolved completely even after 5 year (p = 0.014). Dyspnea and diarrhea were worse after transplantation (p = 0.004, p = 0.037) but got better after T5 (p = 0.017, p = 0.020). The financial impact was more serious post- than pretransplant (p = 0.000), and while relieved after 5 years (p = 0.005) was still different to healthy controls (p = 0.005).

Correlation Analysis Results

Spearman correlation analysis was used to compare some effect factors with the QOL scores at T2 based on r and p values (table (table4).4). We found age was negatively correlated with physical functions and global health, and positively correlated with fatigue and sleep disturbance. Menopausal status has positively correlated with emotional function, fatigue, and diarrhea. Tumor size, stage, and ECOG score were negatively correlated with physical function, and positively correlated with sleep disturbance. Education level was negatively correlated with emotional function. Social status was positively correlated with emotional functions and global health, but negatively correlated with constipation. Income was positively correlated with physical function, but negatively correlated with cognitive function and financial impact.

Discussion

Function and Global Health

An international multicenter and multiscale study [17] indicated that patients’ QOL was still worse than that of healthy controls 7 years after transplant, which usually involved symptoms such as sleep disturbance, physical fitness descent, fatigue, and pain. Other studies [18] showed that most patients felt satisfied with their QOL 1 year after transplant, and 55% of patients employed prior to treatment returned full-time or part-time to their previous occupation. Even if QOL was not very good 1 year on, it would be better after 2-5 years.

From this study, we conclude that ASCT and HDCT have a significant impact on several QOL issues. Mostly, the scores were the lowest just after the transplant, and with time improved and neared the healthy controls. However, QOL was still different between patients and healthy controls at T5. Physical function reflects the status of daily activities which existed before and after ASCT and HDCT in the lives of high-risk breast cancer patients, and impairment of physical function was hard to resolve even after 5 years. Cancer patients have to accept the pain of disease, chemotherapy, transplantation, and treatment, leading to reduced physical capacity and fatigue. Some patients were worried about the disease being advanced and lost confidence to do certain daily activities. Doctors and families should encourage patients to be self-confident and exercise in order to recover physical function.

Hjermstad et al. [19] conducted a study on QOL after transplantation that included a 1-year follow-up. In their report, they concluded that allotransplant patients had higher functional scores and less symptomatology than autologous transplant patients or the control chemotherapy patients. The patients’ emotional function was somewhat impacted by transplantation, especially in the form of anxiety and depression, with some patients requiring psychotropic drugs [20]. During follow-up, the differences were much smaller. Our study found emotional function was worse after transplantation than before (p = 0.000); it was elevated 3 years after transplantation (p = 0.000) but still different to healthy controls after 5 years (p = 0.011). Cancer patients are always under considerable mental stress, feeling worried and anxious. However, during ASCT and HDCT, patients suffered even more tension, worry, and loneliness. With time, self-confidence improved and mental stress was relieved gradually. Many patients returned to being calm and relaxed but still required others to pay attention to them taking care of their body and mind.

Besides physical and mental health, the cancer patients faced somewhat serious social and family problems [21]. Because of fears regarding their disease and economic pressure, patients usually experienced tension in the family, role function subsidence, and social function defects, and started avoiding responsibility. Someone needed more than 5 years to recover [22]. Other studies [23] indicated that most patients after transplant were satisfied with their function recovery. In this study – except for cognitive function which was damaged after transplantation and then got gradually better – role, social function, and global health of the patients were not significantly different before and after ASCT, and were similar between patients 5 years after transplant and healthy controls. We conclude that society had noted the importance of a wholesome approach to recovery of cancer patients, so these patients were respected, supported, and understood well by society. Accordingly, social communication and duties of these patients after ASCT were not notably impaired.

Symptom and Six Single Items

Fatigue was very obvious after HSCT. Most patients felt fatigue, and in 67.5% it was moderate or high. Some studies [24] show that patients in a short period after transplantation had very obvious symptoms of fatigue which continued even 5 years after transplantation. We call this cancer-related fatigue which can be effectively improved by using psychological adjustment and behavior therapy [25]. Other ways to relieve fatigue include easing tension, nutritional therapy, saving energy, engaging in light manual work. Medical workers should be aware of cancer-related fatigue and investigate the causes in order to take effective interventions to help patients to alleviate fatigue.

This study showed that loss of appetite and diarrhea were obvious after transplantation but improved gradually with no significant difference to healthy controls 5 years later. Therefore, patients should observe a reasonable diet during the transplantation process, and not drink or eat too much at once and avoid eating greasy or sweet foods. A reasonable diet can help patients to recover well.

Pain is one of the most important problems faced by cancer patients, which usually exists through the whole course of treatment and recovery and has a serious impact on QOL. This study also reflected this problem. Pain constantly impaired the QOL of the cancer patients before and after transplantation, and was not entirely resolved even after 5 year. Nowadays, doctors are aware of the importance of relieving pain, and many new methods and drugs have been developed. It is not only very significant to the treatment but also improves QOL.

Economic aspect, before and after transplantation, were significantly different. Economic difficulties would ease 5 years after transplantation but were still more serious than in healthy controls; 79.3% of patients thought that treatment costs caused economic difficulties. Other studies [26] reported economic difficulties were prevalent in long-term survivors after transplantation as well as other forms of cancer or chronic diseases [27]. With the current average standard of living in China, completing the entire treatment course would result in great economic difficulties. Patients who have basic medical insurance would bear a lesser economic burden.

Correlation Analysis

Helder et al. [28] indicated that in terms of age, gender, and some other factors, there was no difference between bone marrow transplant in childhood and in adulthood. From this test, we analyzed the correlation between the QOL and some effect factors, and concluded that age was negatively correlated with physical functions and global health, and positively correlated with fatigue and sleep disturbance. With increasing age, the patients’ physical function and global health become worse, and fatigue and insomnia become more evident. Therefore, in the course of treatment, medical workers should pay particular attention to older patients and as far as possible help them alleviate physical suffering. If necessary, drugs can be used to relieve insomnia, pain, and other symptoms.

Menopausal status has a positive correlation with emotional function, fatigue, and diarrhea. The younger patients seemed to be more sensitive when facing disease. Premenopausal women tended to be easily worried, afraid, and sensitive, and lose interest in everything. They need encouragement to return to work and recover their daily activities. Postmenopausal women suffer from the significant changes to their body, and usually feel fatigue. They should pay attention to resting and do exercises.

Tumor characteristics also had an impact on QOL. From this study, we can conclude that tumor size, stage, and ECOG score were negatively correlated with physical function and positively correlated with sleep disturbance. That is because higher-risk breast cancer patients always have a worse prognosis and suffer more physical and psychological pain and stress. In advanced-stage cancer patients that cannot recover completely, the most important thing is to elevate QOL.

In this analysis, emotional function was negatively correlated with education level. More educated patients look up information about their disease in books, the internet, and other ways, but cannot judge correctly the bulk of information they are reading. As a result, worries and anxieties increased, and they became more nervous and less confident. Medical workers should pay special attention to this patient group, patiently answer their questions, and guide them to get information through the correct channels. Psychological guidance is needed to alleviate and actively treat emotional problems.

Some studies did not find marital status and QOL to be correlated [29] considering that the impact of being married or unmarried, or living alone or with others, was not obvious.

Results showed that marital status was positively correlated with emotional function. Those married or living with family could bear physical pain and psychological pressure better than those unmarried, widowed, or living alone. The family's understanding and encouragement would give the patient hope for survival, while being without a family's support can evoke feelings of loneliness and disappointment. Therefore, families should be offered guidance how to lift a patient's spirit and increase his/her confidence which has a significant impact on treatment completion and rehabilitation.

Economic circumstances is an important effect factor of QOL. This study shows that physical function was positively correlated with income level, and negatively correlated with the extent of economic difficulties. Therefore, with living standards and the medical insurance system improving, there will be more patients getting benefit, and QOL will be better. Meanwhile, we should pay more attention to patients without health insurance or with heavy economic burden, and try to keep medical expenses low for them and alleviate economic pressure.

Conclusion

With the medical approach having changed from a purely biomedical model to a social-psychological-medical model, evaluating QOL allows medical workers to fully understand a patient's state of health, and aid the estimation and selection of clinical treatment methods. This is very significant for assessment of curative efficacy and prognosis, cost-benefit analysis of health resources, health care guidance, health education, or rehabilitation treatment. The European Bone Marrow Transplantation Collaborative Group and other centers [30] recommend that medical workers should gain a clear understanding of the patients’ psychological problems after transplantation. It is important to test patients’ QOL in the postoperative recovery period, after 6 months, after 1 year, and in each year of follow-up. There are some limitations to this study, for example, longer follow-up and more patients are needed. Also, the correlation between survival rate and QOL could be explored further.

Conflict of Interest

The authors did not provide a conflict of interest statement.

Acknowledgement

We greatly appreciate the sincere interest and valuable help received from Xingguang Yang. We give special thanks to Jun Ma for data management. We also thank the clinical staff at Tianjin Medical University Cancer Institute and Hospital for follow-up of patients and other patient-related work.

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