Psychometric Properties of Assessment Tools for Depression, Anxiety, Distress, and Psychological Problems in Breast Cancer Patients: A Systematic Review
Article information
Abstract
Objective
Various and accurate psychiatric assessments in patients with breast cancer who frequently suffer from psychological problems due to long-term survivors are warranted. This systematic review aimed to investigate the current evidence on psychometric properties of psychiatric assessment for evaluating psychological problems in breast cancer patients.
Methods
This systematic review progressed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guideline. Four electronic databases such as Web of Science, PubMed, Embase, and Cumulative Index to Nursing and Allied Health Literature were searched. This study protocol was registered on Open Science Framework.
Results
Of the 2,040 articles, 21 papers were finally included. Among them, only five studies showed the performance of psychiatric assessment tools. Among 13 assessment tools used in the selected articles, the Hospital Anxiety and Depression Scale (HADS), Distress Thermometer (DT), or Mini-Mental Adjustment to Cancer Scale was frequently used for the evaluation of psychological problems. The DT and Psychosocial Distress Questionnaire-Breast Cancer showed acceptable performances for the prediction of depression and anxiety assessed by the HADS.
Conclusion
This systematic review found psychiatric assessment tools with acceptable reliability and validity for breast cancer patients. However, comparative studies on reliability and validity of various scales are required to provide useful information for the selection of appropriate assessment tools based on the clinical settings and treatment stages of breast cancer. Joint research among the fields of psychiatry and breast surgery is needed for research to establish the convergent, concurrent, and predictive validity of psychiatric assessment tools in breast cancer patients.
INTRODUCTION
Psychological problems of cancer patients including depression, anxiety, or psychological distress can occur at any stage in diagnosis and treatment process of cancer. The prevalence of depression in cancer patients is about 8%–24% [1], which is much higher than 4% in the general population. The prevalence of any mood disorder is approximately 38% (28%–49%) [2]. With regard to anxiety, 19% of cancer patients showed anxiety symptoms [3]. Zhao et al. [4] reported that 6.6% of cancer survivors experienced serious psychological distress, which was significantly higher than cancer-free adults whose only have a prevalence of 3.7%.
When the psychological problems of cancer patients are not adequately treated, they may last chronically and may significantly degrade their quality of life by stopping them from returning to their normal daily lives [5]. This may also negatively affect recovery from cancer. Significant depression itself reduces compliance with cancer treatment and negatively affects behavioral habits such as sleep, physical activity, and eating, which can decrease survival [6]. Cancer patients with unresolved psychological problems have increased medical costs, such as extended hospitalization and increased visits to medical periods [7]. Therefore, accurately screening the degree of psychological problems in cancer patients is one of the most important factors in cancer treatments. In particular, considering the long-term survivors and the psychological distress during the treatment period [5], it is necessary to effectively evaluate psychological problems in breast cancer patients.
Systems based solely on referrals initiated by physicians or patients for depression in cancer patients could overlook a significant portion of patient’s suffering [8]. To effectively evaluate psychological problems in breast cancer patients, reliable and valid psychiatric assessment tools in perspectives of screening time and psychological domain are required. At the beginning of the diagnosis, psychological problems such as depression, anxiety, and emotional distress experienced during the course of surgical treatment should be assessed. Considering the patient’s physical condition, evaluation tools that need too much time may not be useful [9]. On the other hand, at the point of returning to daily life during chemotherapy after surgery, stress coping and adaptation problems need to be evaluated [10]. In addition, it is necessary to develop cancer-specific assessment tools to evaluate breast cancer-specific problems [11]. Furthermore, the results of psychiatric assessments might be changed according to ethnical, cultural, and linguistic states [12-14]. Therefore, reliable and valid psychiatric assessments in each clinical situation should be obtained. This systematic review aimed to investigate evidence on the reliability and validity of psychiatric assessment tools for evaluating psychological problems in breast cancer patients.
METHODS
We conducted a systematic review and reported its results to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guideline (Supplementary Table 1 in the online-only Data Supplement). The study protocol was registered on Open Science Framework (https://osf.io/j68k9/)
Key question
The purpose of this review was to investigate the reliability and validity of assessment tools for evaluating psychological problems in breast cancer patients.
Search strategies
To examine the status of research related to assessments on psychological problems in breast cancer patients, papers were explored using four search engines, Web of Science, PubMed, Embase, and Cumulative Index to Nursing and Allied Health Literature (CINAHL), for articles published in the past 11 years from 2011 to 2021. The search used these key terms ((anxiety OR depression OR distress OR psychologi*) AND (validation OR reliability) AND (assessment OR tool OR screening OR instrument) ) AND breast cancer (Supplementary Table 2 in the online-only Data Supplement). All articles that were published from January 2011 to December 2021 were included. We applied no restrictions on languages.
Study selection
We deduplicated the articles electronically. The inclusion criteria included clinical studies measuring the validity and/or reliability of psychological problem evaluation tools. The exclusion criteria were 1) articles unrelated to this topic; 2) articles without new research data such as editorials, comments, letters, and reviews; and 3) books. To evaluate the inclusion and exclusion criteria, titles and abstracts of articles in a potential eligible list were read independently by two authors (HSP, KEK). Articles by both reviewers who met the exclusion criteria were removed from the potential eligibility list. The full text of the remaining articles on the potential eligibility list was read independently by two authors (HSP, KEK) to evaluate the article’s eligibility. If there was a disagreement, a consensus meeting was held with the third and fourth reviewers (ESM, TWK).
Data extraction
To prevent bias or omission, two authors (HSP, KEK) independently extracted data from the included studies. When there were any disagreements on the extracted data, a consensus meeting with other reviewers (ESM, TWK) was held to solve the disagreements. We used structured data extraction on the author, year of publication, country, study type, age group, patients’ stage, sample size, study aim and conclusion, reliability, and validity assessment related to numerical value key findings. Cronbach’s alpha for internal consistency, model indices for validity, and the results of performance such as sensitivity, specificity, positive predictive value, and negative predictive value were extracted.
RESULTS
Study selection
As a result, 2,040 documents were searched, and duplicate documents were primarily excluded. After that, 42 papers studied based on the contents of screening and evaluation of psychological problems in breast cancer patients were finally selected by reviewing the abstract and title; after reading the full text of the remaining articles, 21 articles were finally selected (Figure 1).

Flowchart of the search process and the number of selected studies. Initial searching retrieved 2,040 articles. After deduplication and screening of titles and abstracts, 42 articles were selected. After checking full-text articles and assess eligibility and the purpose of this study, 21 articles were finally selected.
Characteristics of the included studies
Twenty-one studies included patients from various stages, and five studies included stage IV patients [15-35]. Article types, years of publication, assessment tools, psychological evaluation domains, ethnicities, participants’ age, and research aims and conclusions of the included studies are summarized in Table 1. A total of 13 assessment tools were used in the final included study, among them, the Hospital Anxiety and Depression Scale (HADS) was most frequently used 12 times to evaluate directly or to evaluate the results of other assessment tools. Next, the Distress Thermometer (DT) was used in 5 studies and the Mini-Mental Adjustment to Cancer Scale (Mini-MAC) was used in 4 studies.
Results of reliability in included studies
The results of the reliability of the psychiatric assessment tools for psychological problems assessment tools were summarized in Table 2. Cronbach’s alpha value of the study on the HADS was in the range of 0.74–0.87. The Mini-MAC was in the range of 0.78–0.90. In addition, the Cronbach’s alpha values in other assessment tools were generally distributed in a similar range. For the reliability evaluation, Cronbach’s alpha was used in most studies. It is also known as tau-equivalent reliability or coefficient alpha, is the most common test score reliability coefficient for a single administration [36,37]. In general, Cronbach’s alpha is preferably 0.70 or above is good, 0.80 or above is better, and 0.90 or above is best [38]. All included studies met this criterion. Based on these criteria, the HADS, Mini-MAC, Center for Epidemiologic Studies Depression Scale (CES-D), Psychosocial Distress Questionnaire-Breast (PDQ-BC), Newly Diagnosed Breast Cancer Stress Scale (NDBCSS), Patient Health Questionnaire-9 (PHQ-9), State-Trait Anxiety Inventory (STAI), Brief Illness Perception Questionnaire (B-IPQ), and Psychological Adaptation Scale (PAS), whose reliability was investigated in this study, were considered acceptable and appropriate for use in breast cancer patients.
Results of validation in included studies
The results of the validity of the psychiatric assessment tools for psychological problems assessment tools using factor analysis and correlation analysis were summarized in Table 2. The area under the curve (AUC) value was used to evaluate its validity. Validation indices such as root mean square error of approximation (RMSEA), comparative fit index (CFI), and Turker-Lewis index (TLI) were used for model suitability evaluation in confirmatory factor analysis. When the AUC value is closer to 1, it indicates the model is better, and usually 0.8 or higher, the model is considered to have an excellent performance, but most studies have confirmed a value of 0.8. RMSEA was frequently used to verify the validity of the structure, and it is judged that smaller value signifies a better model. If it is less than 0.08, it is considered a good model, and if it is less than 0.05, it is regarded as a very good model, and overall, it is found to satisfy good and very good. Based on these criteria, the validity of this study was acceptable. Since the value of RMSEA used for structural suitability evaluation also satisfied the criteria, it was judged that it would not be unreasonable to apply it to breast cancer patients. AUC was 0.81–0.95 (exception B-IPQ 0.39–0.55), RMSEA was 0.04–0.08, CFI was 0.92–0.97, and TLI was 0.096–0.097.
Among the included 21 studies, there were only five studies showing performance on sensitivity, specificity, positive predictive value, and negative predictive value [16,18,20,25,34]. The results on the performance of psychiatric assessment tools were summarized in Table 3. Of the five studies, three studies reported the results of receiver operating characteristics curve analyses on the DT scale. Bidstrup et al. [16] examined sensitivity, specificity, positive predictive value, and negative predictive value of the Danish version of DT in 333 women with newly diagnosed primary breast cancer. This study reported that a cutoff score of ≥3 on DT was optimal for screening with a sensitivity of 99% and a specificity of 36%. Meanwhile, Yong et al. [34] validated the Malaysian version of DT among 150 breast cancer survivors. A cutoff score of ≥5 on DT showed a sensitivity of 90.9% and a specificity of 89.8%. Iskandarsyah et al. [25] reported that the Indonesian version of DT showed a sensitivity of 81% and a specificity of 64% using a cuoff score of ≥5 in 120 breast cancer patients. Of the five studies, two studies reported the results of performance on the PDQ-BC scale. These studies were performed by the research group that initially developed the PDQ-BC [17]. The former study revealed a good sensitivity (0.786–0.875) and specificity (0.730–0.811) in 164 women with breast cancer before the start of adjuvant chemotherapy [20]. The later study also showed a sensitivity of 87.5% and a specificity of 81.1% for state anxiety and a sensitivity of 78.6% and a specificity of 73.0% for depressive symptoms in 80 women with early-stage breast cancer [18].
DISCUSSION
This systematic review examined the evidence during the recent decade on reliability and validity of assessment tools for depression, anxiety, distress, and psychological problems in breast cancer patients. Given that the necessity of cancer-specific psychiatric assessment tools as well as reliable and valid scales in breast cancer patients, this systematic review provided useful information on the selection of proper assessment tools for screening and monitoring principal psychological problems such as depression, anxiety, and distress in patients with breast cancer. This systematic review finally included 21 studies that used various assessment tools (Table 1). Among 21 studies, 10 studies using the HADS, DT, Mini-MAC, CES-D, PDQ-BC, NDBCSS, PHQ-9, STAI, B-IPQ, and PAS reported the results on reliability or validity of psychiatric assessments for breast cancer patients (Table 2).
The most frequent assessment tool among the selected 21 studies was the HADS which was developed in 1983 by Zigmond and Snaith [39]. The HADS consisted of 14 items to measure the degree of anxiety and depression of patients visiting general hospitals in a short time waiting for medical treatment. This systematic review showed that the HADS could be an efficient assessment tool for patients with breast cancer, as well as those with other medical diseases [40,41]. The next most frequent scale was the DT which was developed by Roth et al. [42] for the distress screening of prostate cancer patients in 1998. The DT is a self-reported, single-item question using a visual analog scale rating 0 (no distress) to 10 (extreme distress) of emotional distress presented as a thermometer. The National Comprehensive Cancer Network pairs the DT with a 42-item problem list, to allow patients to identify their problems in five categories: social, family, emotional, spiritual/religious, and physical [43]. DT has been validated in several studies of different types of cancer patients and has shown excellent sensitivity and specificity [44,45]. This systematic review also found that the DT had good concurrent validity and good sensitivity for breast cancer patients. However, some studies reported low specificity. Therefore, when using the DT, it is recommended to use it for screening psychological distress. Otherwise, it is necessary to consider using the DT with other assessment tools showing high specificities. In addition to the HADS and DT, other psychiatric assessments such as the CES-D, PHQ-9, and STAI have been used in breast cancer patients [15,21,26,32]. Although studies on these scales were relatively small compared to the HADS or DT, they are expected to be useful in breast cancer patient.
Meanwhile, in case of breast cancer, it is important to accept and adapt to the disease because the survival rate is relatively high and long-term treatment is required [5]. For this reason, psychiatric assessments for coping responses [22,23,29,33], illness perception [35], and psychological adaptation [28] of breast cancer patients have been studied. In particular, the 29-item or 24-item Mini-MAC, a brief version of the Mental Adjustment to Cancer (MAC) scale to measure coping responses for cancer patients have been effectively used in brease cancer patients [22,23,29,33,46-51]. The Mini-MAC assesses five cognitive coping responses: helplessness-hopelessness (e.g., “I feel like giving up”), fighting spirit (e.g., “I see my illness as a challenge”), cognitive avoidance (e.g., “Not thinking about it helps me cope”), fatalism (e.g., “At the moment I take one day at a time”), and anxious preoccupation (e.g., “I am apprehensive”) [52]. In addition to the Mini-MAC, the 20-item PAS for evaluating psychological adaptation or the 9-item B-IPQ for illness perception can be used. Furthermore, the PDQ-BC or NDBCSS were developed and used to evaluate psychological distress and stress of breast cancer patients [17,18,20].
This systematic review found various assessment tools to have good reliability and validity for breast cancer patients. However, there seems to be a lack of studies for comparison of the psychometric properties of psychiatric assessment tools for breast cancer patients. To provide useful information for the selection of appropriate assessment tools according to clinical settings and treatment stages of breast cancer, comparative studies on the reliability and validity of various scales are warranted. In perspectives of validity, convergent validity on each scale in breast cancer patients needs to be established. Additionally, for the application of psychiatric scales in real practice for breast cancer patients, more studies on the concurrent validity associated with various psychological problems or psychiatric symptoms need to be explored. Furthermore, the predictive validity related to the development into psychiatric illness or surgical prognosis of breast cancer needs to be investigated in future studies.
There were some limitations in this systematic review. Firstly, the previous studies published before 2011 were not included, because the search time frame for this systematic review was limited from 2011 to 2021. Unfortunately, a small portion of English-speaking studies among all studies was included, although there were not any language restrictions. The English-speaking studies might be performed before 2011 than non-English-speaking studies. Secondly, because this systematic review only used four databases, studies published in other databases were not included in this systematic review. However, because four databases such as Web of Science, PubMed, Embase, and CINAHL in this study were known as principal databases, most of the well-designed studies might be included.
This systematic review summarized the evidence on psychometric properties of psychiatric evaluation tools for breast cancer patients. This review identified 2,040 articles and showed the results of reliability and validity in 10 studies among included 21 articles. The HADS and DT for measuring depression, anxiety, and emotional distress were widely used. There have been studies to reduce the number of items in the MAC, which evaluate coping responses in cancer patients, to make it an easy-to-use tool. As well as breast cancer-specific tools such as the PDQ-BC and NDBCSS were being developed to evaluate distress focused on breast cancer patients. This systematic review found reliable and valid assessment tools to evaluate depression, anxiety, distress, and psychological problems for breast cancer patients. However, comparative studies on reliability and validity of various scales are required for selection of proper assessment tools according to clinical situations. Furthermore, convergent validity on each scale needs to be established, and concurrent or predictive validity on psychiatric symptoms, psychiatric illness or surgical prognosis should be explored for effective use in breast cancer patients.
Supplementary Materials
The online-only Data Supplement is available with this article at https://doi.org/10.30773/pi.2022.0316.
The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist
Search strategies used in this systematic review
Notes
Availability of Data and Material
The datasets generated or analyzed during the study are available from the corresponding author on reasonable request.
Conflicts of Interest
The authors have no potential conflicts of interest to disclose.
Author Contributions
Conceptualization: Eunsoo Moon, Taewoo Kang. Data curation: Heeseung Park, Kyoung-Eun Kim. Investigation: Heeseung Park, Eunsoo Moon, Taewoo Kang. Methodology: all authors. Project administration: Eunsoo Moon, Taewoo Kang. Resources: Heeseung Park, Kyoung-Eun Kim. Supervision: Eunsoo Moon, Taewoo Kang. Validation: Eunsoo Moon, Taewoo Kang. Visualization: Heeseung Park. Writing—original draft: Heeseung Park. Writing—review & editing: Kyoung-Eun Kim, Eunsoo Moon, Taewoo Kang.
Funding Statement
None