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Eur J Cardiothorac Surg 2006;30:548-553
© 2006 Elsevier Science NL
a Faculty of Medicine (Université de la Méditerranée)Assistance Publique Hôpitaux de Marseille, Department of Thoracic Oncology, Hôpital Sainte-Marguerite, 13274 Marseille Cedex 09, France
b Faculty of Medicine (Université de la Méditerranée)Laboratoire de Santé Publique, Evaluation hospitalièreMesure de la Santé perçue (EA 3279), 13385 Marseille Cedex 05, France
c Faculty of Medicine (Université de la Méditerranée)Assistance Publique Hôpitaux de Marseille, Department of Thoracic Surgery, Hôpital Sainte-Marguerite, 13274 Marseille Cedex 09, France
Received 10 February 2006; received in revised form 29 May 2006; accepted 31 May 2006.
* Corresponding author. Address: Service dOncologie Thoracique, Fédération des Maladies Respiratoires, Hôpital Sainte-Marguerite, 270, Bd de Sainte-Marguerite, 13274 Marseille Cedex 09, France. Tel.: +33 491 74 47 36; fax: 33 491 74 55 24 (Email: fabrice.barlesi{at}mail.ap-hm.fr).
| Abstract |
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Key Words: Lung cancer Surgery Quality of life PGWBI EORTC QLQ-C30
| 1. Introduction |
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In fact, few studies have considered the postoperative QOL of NSCLC patients. Dales et al. [3] demonstrated the deterioration in QOL during the first three months after thoracic surgery for lung cancer but also highlighted an improvement back to baseline within six to nine months. However, these earliest studies were hampered by important biases such as small numbers of patients, as in the study by Zieren et al. (n = 20) [4], or low proportions of collected questionnaires, as in the study by Hendriks et al. (n = 31, 34%) [5]. More recently, Handy et al. [6] studied the preoperative QOL of 139 NSCLC patients using the Short-Form 36 health survey (SF36) and demonstrated impaired preoperative physical and emotional functioning, mental health, and energy when compared with a healthy, age-matched control population. At six months, 103 patients (74%) were evaluated and showed significant further postoperative decline in physical, social, and mental states, as well as bodily pain. When compared with healthy, age-matched control subjects, remarkable and durable physical, emotional, social, and mental impairment as well as bodily pain were found in these patients six months after lung cancer surgery [6]. Myrdal et al. compared 194 NSCLC patients surgically treated with a control group of patients undergoing a coronary bypass surgery (CABG). At the time of analysis (median follow-up, 23 months, range 448 months), 132 patients were alive (68%) and showed QOL SF36 scores comparable to those of CABG patients [7]. NSCLC patients did not show any impairment in social function or mental health status. However, both groups of patients deviated from the normal population in all the subclasses of the SF-36 except for body pain. In addition, the authors suggested that patients who continued to smoke after surgery seemed to have impaired QOL with regards to mental health compared with those who stopped smoking [7]. In a recent work, Win et al. [8] studied 110 patients undergoing thoracic surgery and confirmed an immediate postoperative QOL deterioration with a return to baseline at six months. No preoperative health-related QOL scales (HRQOL) were significantly associated with poor outcome defined by surgical mortality and/or major complication. However, baseline percentage predicted TLCO was marginally correlated with the six-month global health status (r = 0.22, p = 0.05), and some preoperative HRQOL scales also correlated with six-month global health status [8]. Finally, 142 NSCLC patients who survived more than five years were included in a study by Sarna et al. [9]. These long-term survivors mainly described themselves as hopeful (71%). Those survivors with lower mental component scores were associated with distressed mood while lower physical component scores were related to older age, living alone, pulmonary impairment, distressed mood and co-morbid diseases [9].
While these long-term postoperative QOL studies are of importance, more short-term postoperative studies are necessary. In fact, a proportion of 2632% of patients in the above-mentioned studies did not survive up to six months or more after surgery mainly because of delayed postoperative death or relapse. Accordingly, these patients experienced a postoperative disability related to the thoracic surgery but did not benefit from a survival advantage. Thus, improvement of QOL for all NSCLC patients surgically treated is necessary and an evaluation of the predictive factors influencing the short-term postoperative QOL is required.
The aim of this study was to explore the value of socio-demographic and clinical characteristics as well as Psychological Global Well Being Index (PGWBI) scores of NSCLC patients treated with thoracic surgery, to predict the postoperative short-term QOL.
| 2. Patients and methods |
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2.2 Surgery
The thoracic surgery was standardized as previously described [10]. Briefly, the selection of candidates for surgery was based upon the adherence to published guidelines. The surgical procedure was carried out on the basis of the following principles. Firstly, an anatomical resection as a lobectomy or a pneumonectomy was defined as the standard resection in fit patients, thus excluding atypical resection. Secondly, a routine reinforcement of the main stem bronchus suture in the case of a right pneumonectomy to minimize the particularly high risk of postoperative fistula on that side. Thirdly, a routine mediastinal lymphadenectomy was considered as an essential component of thoracic oncological surgery. Occurrence of a postoperative complication was examined and classified as a minor or major complication. Major complications included prolonged stay or readmission to the intensive care unit, acute respiratory distress syndrome, broncho-pleural fistula, hemothorax, septic shock, myocardial infarction, and severe heart failure defined using internationally available criteria.
2.3 Quality of life data
The patients mood state was assessed preoperatively, within the previous month, using the Psychological Global Well Being Index [11]. The PGWBI is a brief self-administered questionnaire which contains 20 items rated on a six-point scale, where a higher score indicates a better quality of life and measures six mood states (anxiety, depressed mood, positive well-being, self-control, general health, vitality). The six mood states are scored as follows: 25 for anxiety, 20 for positive well-being and vitality and 15 for remaining states. The PGWBI was completed by the patients themselves.
The PGWBI has been chosen giving its demonstrated validity and reliability. Furthermore, PGWBI might be easiest to use because of its relatively low number of items (n = 20) when compared with SF-36 (n = 36) or European Organization for Research and Treatment of Cancer (EORTC) QOL Questionnaire (QLQ-C30) and the specific lung cancer (LC13) questionnaire (n = 43).
Within the month after the operation, the patients QOL was assessed using the EORTC QLQ-C30 + LC13 questionnaires. The EORTC QLQ-C30 is a self-administered 30-item questionnaire composed of five functional scales (physical, role, emotional, social and cognitive function), three symptom scales (fatigue, gastro-intestinal (GI) symptoms, and pain), and a global QOL scale. This tool has undergone extensive validation and its measurement properties (reliability, validity, responsiveness) are well described in the literature [12,13]. Overall scale scores were calculated. Raw scores for all the scales were converted to standard scores (0100).
2.4 Data management and statistical analysis
Two patients were lost in follow-up. The overall survival time was defined as the time from the date of surgery to date of death due to any cause. Patients who were alive at the date of the last follow-up were censored on that date plus one day.
Correlation between preoperative PGWBI scores and postoperative EORTC scores were performed using a Spearman correlation test. All the tests were two-sided. A regression analysis was also performed to examine the value of socio-demographic, clinical and PGWBI scores in independently predicting postoperative QOL.
Survival data were updated in February 2005. Probability of survival was estimated using the KaplanMeier method. Differences in survival were tested by means of the log rank test.
Statistical significance was defined as p < 0.05. Statistical analysis was performed using the SPSS version 10.1 software package.
| 3. Results |
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3.4 Postoperative quality of life
In all, 72 patients completed the postoperative QOL questionnaires (86%). The reasons for the missing responses are operative or major postoperative complications (n
= 7) with patients too unfit to complete the questionnaire (n
= 5). The median scores (range) for the three symptoms scales were as follows: fatigue, 39 (0100); GI symptoms, 8.0 (050); and pain, 31 (0100). The median scores for the EORTC-LC13 questionnaire were 22 for dyspnoea (0100), 33 for coughing (0100), 33 for chest pain (0100), and 0 for all the remaining scales. The median scores for the global QOL and the five functional scales and their correlation with patient and disease characteristics are shown in Figs. 13
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| 4. Discussion |
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The preoperative QOL of NSCLC patients undergoing thoracic surgery is poorer when compared with QOL of healthy patients [6,7]. Postoperatively, NSCLC patients QOL is further worsened for a period of 3 to up than 12 months, before generally recovering to baseline if no relapse occurs in the mean time [3,8] An attempt to correlate the preoperative QOL with some postoperative outcome has been proposed. For example, for patients without severe outcomes, the global QOL scale of the EORTC QLQ-C30, combined with the results of a 6-min walk test, has been related to the length of hospital stay in the first 30 days after the surgery (multiple linear regression, R 2 = 0.224, p < 0.001) [14]. In another study on 117 patients, Dales et al. [15] concluded that general quality-of-life measures were not good predictors of postoperative morbidity after thoracic surgery. On the other hand, several preoperative or operative factors have been studied in order to predict the long-term postoperative QOL. For example, a poor respiratory status, assessed by the mean of the diffusion capacity of the lung for carbon monoxide (DLCO), contrary to the forced expiratory volume in 1 s (FEV1), has been associated with a poor postoperative QOL [5]. Similarly, a more extensive pulmonary resection such as a need for a pneumonectomy has been also correlated with a poor postoperative QOL [46]. However, the predictive value of a preoperative QOL assessment to detect patients at risk of a poor postoperative QOL had not been studied before.
The published results on the impact of socio-demographic factors on the postoperative QOL are frequently patchy and conflicting. The postoperative SF-36 scores showed no correlation with gender or age [5,6] despite the fact that women experience a range of disruptions in QOL especially the younger ones, and those with depression and co-morbid diseases [16]. The postoperative QOL might also be influenced by the level of education. A poorer QOL has been described for patients with a lower level of education and may be related to the higher proportion of depression experienced by these patients [17]. In addition, SF-36 scores of long-term survivors are lower for patients living alone when compared with patients living in a couple [7]. Although debatable, the marital status may influence prognosis through mechanisms of health behavior and/or social support mechanisms [18]. However, the relationship of NSCLC patients with the family is complex as up to 34% of the patients also perceived serious distress within the family [7]. The influence of the socio-demographic factors on psychological well-being is likely. The psychological distress among NSCLC patients is considerable after surgery. Whereas only approximately 10% of survivors at five years reported fear of second cancer, relapse or metastasis, the QOL assessment shows depression, anxiety, changes in self-concept or changes in appearance in up to 30% of patients [7,19].
Montazeri et al. [20] retrieved more than 50 instruments from the analysis of studies concerning QOL evaluation of NSCLC patients. Considering our experience, EORTC QLQ-C30 plus LC13 and PGWBI questionnaires were found as the most suitable tools for the study of NSCLC patients QOL before and just after thoracic surgery. In fact, the Functional Assessment of Cancer T-Lung (FACT-L) that does not directly integrate the treatment-related symptoms and the Lung Cancer Symptoms Scale (LCSS), which combine auto-evaluation by patients and hetero-evaluation by clinicians, were not considered [21,22]. The SF-36 has been extensively applied for the QOL studies of NSCLC patients [57]. However, a questionnaire allowing a wide psychological assessment such as the PGWBI has been preferred.
Improvement of the NSCLC patients QOL is of a great importance considering that QOL of lung cancer patients more deeply worsen and for a longer time when compared with other cancer patients [18]. A simple preoperative assessment of the PGWBI scores allows us to highlight those patients at higher risk of poor postoperative QOL. These patients may then be proposed with specific program of information, psychological and/or social support in order to protect their postoperative QOL. Indeed, keeping NSCLC patients with a high QOL should be of paramount importance when we consider the favorable impact on survival reported for patients with a good QOL [2325].
In conclusion, improvement of the QOL of NSCLC patients managed with thoracic surgery is mandatory considering the sometimes altered QOL before surgery and its further postoperative worsening. A simple assessment of patients at higher risk of a poor postoperative QOL could easily be performed preoperatively, taking into account certain socio-demographic factors and the results of the PGWBI scores.
| Acknowledgments |
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| References |
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