Employment and Characteristics of Clinical Data and QOL Scales in Our Study
The clinical data of 92 patients out 132 followed-up patients were enrolled in our study, with a follow-up rate of 70%, which is higher than some other similar studies.14 Our study is also characterized by a relatively high rate of laryngectomees (62%) partly because of the patients from the New Voice Club of Guangzhou, which is a nonprofit organization aiming to help laryngectomees regain speech and get adapted to the physical and psychological changes related to laryngeal carcinoma. In that case, we could study more about the QOV and HRQOL of laryngectomees. The researchers were specially trained for one-to-one follow-up of patients so that the consistency of follow-up outcome was effectively improved. Being the HRQOL scale exclusively for head–neck cancer patients, EORTC QLQ-H&N35 (Version in Chinese)12 was used in combination with and as a supplement of EORTC QLQ-C30, as is often seen in other studies.7 These 2 scales which were introduced into China and translated into Chinese during recent years crown all the aspects regarding the HRQOL of patients with cancers and are easy to understand and fill in, showing good validity and credibility.15,16 In spite of that, these 2 scales are not sufficient for the evaluation of QOV which, however, can be well evaluated using VHI,17 implying the emphasis on QOV of our study. The correlation between QOV and HRQOL of patients with laryngeal carcinoma was not so much studied in the past and the results of the previous studies were dramatically different from one another. Lundstrom et al17 concluded that total VHI and emotional VHI were both significantly correlated to global health/QOL, but Stewart et al18 concluded not. The present change of medical mood from biomedical mood to biopsychosocial mood in China requires more emphasis on the QOL of patients with laryngeal carcinoma, which, however, is somehow neglected by Chinese doctors and not so adequately reported. So, it is hoped that our study can somehow fill the gap in this field.
Differences in HRQOL Among Patients With Different Clinical Characteristics
The impact of age on the HRQOL of patients with cancer has been confirmed in many previous studies.12,19 Our analysis using EORTC QLQ-C30 and QLQ-H&N35 can draw a similar conclusion that elder patients are more vulnerable to symptoms caused by cancer, as was seen in multiple domains or aspects, leading to a significantly poorer global health/QOL than that of young patients. Nevertheless, young patients are more concerned about the impacts of cancer on their social functions and financial statuses probably because of their limited economic strengths but bigger social/familial responsibilities so that it is more difficult for them than for the elder patients to get adapted to the social and economic pressures caused by cancer.
Patients with laryngeal carcinoma who receive postoperative chemotherapy will stand many kinds of discomforts including xerostomia, pain, vomitus, diarrhea, etc.20 However, many reports21,22 concluded that postoperative chemotherapy had no significant impact on the patients’ global health status. In our study, the patients with postoperative chemotherapy had poorer global health/QOL, as well as the HRQOL in 2 aspects (social functions and fatigue) of QLQ-C30 and 6 (pain, swallowing, sensory disturbances, social dieting, social contact, and xerostomia) of QLQ-HN35. This could have been related to the oriental race that cannot bear chemotherapeutic regimens with such big dosages which, at present, have been established mainly according to foreign clinical data. A prospective study completed in China has recommended decreased drug dosages in TPF neoadjuvant chemotherapy against late-staged head–neck cancers (Taxotere 60 mg/m2 d1, DDP 60 mg/m2 d1, 5-FU 600 mg/m2 d1–5 repeated in 3-week cycles), which seems safer, more efficient, and more appropriate for easterners.23 It is suggested that besides efficacy, the impact of postoperative chemotherapy on HRQOL be also taken into consideration with dosages appropriate for easterners so as to improve HRQOL by reducing adverse effects.
Global Health/QOL and Its Leading Impacting Factors
As a unique domain of EORTC QLQ-C30, global health/QOL is a comprehensive judgment made by the patient him/herself on his/her own physical status and state of life which reflects the patient's satisfaction and general feeling about his or her post-therapeutic life. However, global health/QOL was previously seen only as simply a scoring other than a key to explore the underlying functional deficiency and symptomatic disturbances.
Our study combined the 2 different scales using GLM analysis so that both systemic and regional statuses were estimated, drawing a conclusion that could better reflect the patients’ actual clinical states. Our study demonstrated that pain, dry mouth, and speech disorder were the main factors impacting the postsurgical HRQOL of patients with laryngeal carcinoma. Nevertheless, Lundstrom et al24 concluded that global health/QOL was related to xerostomia, swallowing disorders, human communication disorders and so on, not to dry mouth, and speech disorders. This is probably because that there was a high proportion of laryngectomees in our study and that we Chinese have, from that of westerners, different economic, cultural and familial conceptions, physical conditions, and treatment privileges, which can all influence our choice of treatment modalities. People in western countries have better medical insurance, so that most of the patients with laryngeal carcinoma were treated with larynx preserving methods such as irradiation, chemoradiotherapy, and partial laryngectomy with postoperative irradiation. When it comes to our patients, most of them were treated with surgery which is relatively cheap and less toxic, mainly aiming at longer survival. Laryngectomees were in a high proportion with low rates of postoperative phonatory button installation and esophageal phonation, so that they had to use electrolarynges for communication, leading to poor QOV dramatically influencing HRQOL.
It was demonstrated in our study that postsurgical QOV was significantly negatively correlated with global health-related QOL (Figure 1), implying that QOV was an important factor impacting HRQOL. So, improvement of QOV must be thoroughly considered when making a treatment planning for a patient with late-staged laryngeal carcinoma. For these patients especially those who strongly demand preservation of voice, organ preservation therapies should be given with the permission of global health and oncological statuses. These therapies include partial laryngectomy followed by postoperative irradiation, preoperative chemotherapy or irradiation followed by preservative laryngectomy or chemoradiotherapy according to the response of tumor, or chemoradiotherapy directly used as a curative method. For those whose larynges must be sacrificed, an attempt of simultaneous voice restoration must be tried with methods such as Blom-Singer tube to improve postsurgical HRQOL.
According to the GLM analysis in our study, the other important factor that significantly impacted the postsurgical HRQOL of patients with laryngeal carcinoma was pain. Nowadays, in most of the hospitals in China, open surgeries including laryngectomies and neck dissections are still the mainstream therapy against laryngeal carcinoma, with adjuvant irradiation and/or chemotherapy for late-staged diseases. Under this situation, postsurgical pain can be caused by multiple factors, obviously depressing the HRQOL of patients. In western countries, however, irradiation or chemoradiotherapy are used against laryngeal carcinoma as the main treatments, causing relatively mild adverse effects only in a short term. This could have explained the difference of our outcome from that of similar studies in other countries. Pain can cause not only worsening of HRQOL of the patients25,26 but also an adverse psychological suggestion with a negative impact on the patients’ living attitudes and statuses. Therefore, on one hand, surprising outcomes may be achieved by providing the patients’ with pain with psychological counseling as well as analgesics; on the other hand, all efforts must be done in the treatment planning for late-staged laryngeal carcinoma to preserve as many normal tissues and organs as possible, in addition to radical therapy, so as to reduce, to the maximum extent, surgical trauma. Intraoperative techniques such as detection of sentinel lymph nodes are advocated to avoid unnecessary neck dissection. The dosages and courses of adjuvant radio- and chemotherapy should be well profiled in order not to add too much to the surgical trauma causing pain.
Weight gain was demonstrated in our study as a positive impacting factor for HRQOL. This may be because that weight gain has been traditionally considered by Chinese as an improvement of global health and some of the elder patients even consider it the sign of regaining of health. As unique as it is, the positive impact of weight gain on the HRQOL of our patients was significant.
Limitations and Future Views of Our Study
The main limitation of our study is that only 30% of the patients replied in the domain of sexuality in their questionnaires, making it insufficient for further statistical analysis. Most of the patients were reluctant to this issue when asked about their status of sex, which was typical in the Chinese culture. Despite that sexuality is much more openly accepted as part of HRQOL by the public in China, it is still, to many Chinese, a topic not so easily sharable with others, not even doctors or other professionals. Thus, the meaning of normal sexuality to the improvement of HRQOL is often neglected, either actively or passively. Above all, we had to give up the exploration in this domain. To better this situation, doctors must try to get trusted by and further know about their patients so that appropriate guidance can be given to help improve the patients’ HRQOL.
Other limitations also exist in our study. First of all, this is a retrospective cross-sectional study in which the lack of information of the patients’ preoperative health statuses made difficult a preoperative–postoperative comparison. Therefore, the statistical results should not be contributed only to the treatment modalities. On the other hand, this is a short-term follow-up study that cannot enable survival analysis. Third, the high expenses and relapse rates of irradiation and chemoradiotherapy made them not yet so widely accepted in China so that these patients who are in a relatively small number were not included in our study.
QOL is not only a series of numbers but an important concept that must be kept in every doctor's mind.27 For patients with laryngeal carcinoma, whose function-related QOL can probably be further improved by phonation training and psychological counseling.28 Some surgeons are trying work out more skillful surgeries aiming at better QOV, from which may further improve the patients’ postsurgical global health/QOL.
For the patients with laryngeal carcinoma included in our study, the QOL after open surgeries were impacted by many factors predominated by pain, dry mouth, and speech disorder. It is suggested that doctors in China do more efforts on the patients’ postoperative pain management and speech rehabilitation with the hope of improving the patients’ overall quality of life.
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