Mediational roles of stress-coping factors in the relationship between patient-perceived communication quality and physical functioning: racial difference between Chinese and Non-Hispanic White American breast cancer survivors.

PURPOSE: The assumption that patient-provider communication may mediate patients' sense of control over cancer to affect health outcomes has limited evidence. This study examines whether patient-perceived cancer care communication quality (PPCQ) mediates stress appraisal and coping behavior, affecting physical functioning across different racial groups. METHODS: Two hundred and twenty Chinese American and 216 non-Hispanic White (NHW) women (ages 28-80) with stage 0-III breast cancer, 1-5 years post-diagnosis, and without recurrence, enrolled and completed a cross-sectional telephone survey. Physical functioning was measured by the NIH-PROMIS short form. Validated measures of PPCQ, patients' evaluation of their socioeconomic well-being, stress appraisal (perceived severity and control), use of coping strategies, treatment-related symptoms, and comorbidities were also assessed. Path analyses were used to examine the mediation for each racial group. RESULTS: Regardless of race, treatment-related symptoms, comorbidities, and socioeconomic well-being were all directly related to physical functioning (p < 0.05). The impact of PPCQ on physical functioning was mediated by perceived control in the Chinese American group (p < 0.05), but not in the NHW group. Perceived severity and coping were not mediators of physical functioning in either group. CONCLUSIONS: The mediational pathway from PPCQ to perceived control to physical functioning in Chinese American survivors may be partially explained by their lower socioeconomic well-being and culturally valued conformity to physicians as a medical authority. These sociocultural dynamics reinforce the importance of cancer care communication. For NHW survivors, the impact of treatment-related symptoms and socioeconomic well-being on physical functioning outweighed their PPCQ and perceived control.

Selective de-implementation of routine in vivo dosimetry.

As cone-beam computed tomography (CBCT) has become the localization method for a majority of cases, the indications for diode-based confirmation of accurate patient set-up and treatment are now limited and must be balanced between proper resource allocation and optimizing efficiency without compromising safety. We undertook a de-implementation quality improvement project to discontinue routine diode use in non-intensity modulated radiotherapy (IMRT) cases in favor of tailored selection of scenarios where diodes may be useful. After analysis of safety reports from the last 5 years, literature review, and stakeholder discussions, our safety and quality (SAQ) committee introduced a recommendation to limit diode use to specific scenarios in which in vivo verification may add value to standard quality assurance (QA) processes. To assess changes in patterns of use, we reviewed diode use by clinical indication 4 months prior and after the implementation of the revised policy, which includes use of diodes for: 3D conformal photon fields set up without CBCT; total body irradiation (TBI); electron beams; cardiac devices within 10 cm of the treatment field; and unique scenarios on a case-by-case basis. We identified 4459 prescriptions and 1038 unique instances of diode use across five clinical sites from 5/2021 to 1/2022. After implementation of the revised policy, we observed an overall decrease in diode use from 32% to 13.2%, with a precipitous drop in 3D cases utilizing CBCT (from 23.2% to 4%), while maintaining diode utilization in the 5 selected scenarios including 100% of TBI and electron cases. By identifying specific indications for diode use and creating a user-friendly platform for case selection, we have successfully de-implemented routine diode use in favor of a selective process that identifies cases where the diode is important for patient safety. In doing so, we have streamlined patient care and decreased cost without compromising patient safety.

Exploring Racial Differences in Treatment Decision-making in Chinese Immigrant and White American Breast Cancer Patients: the Role of Patient-Provider Communication.

Chinese immigrant cancer patients report suboptimal patient-provider communication, which increases the likelihood of decisional conflict and unsatisfactory treatment decision-making (TDM) outcomes (e.g., low satisfaction and perceived control over cancer care). This cross-sectional study explored whether (1) communication and decisional conflict factors associated with TDM outcomes differed between Chinese immigrant and non-Hispanic White breast cancer patients, and (2) the association between patient-provider communication and the outcomes were mediated by TDM factors, regardless of race. Ninety-eight breast cancer patients, diagnosed at stage I-III participated in cross-sectional survey interviews. TDM outcomes and possible predictors of the outcomes (e.g., patient-provider communication, decisional conflict, preference for who makes the treatment decision) were assessed. Linear regression and mediational testing were performed to examine associations among variables of interest. Of the 98, 85 were included for analysis. Chinese patients with limited English proficiency (n = 37) had poorer patient-provider communication, higher decisional conflict, and preferred providers to make decisions than non-Hispanic White patients (n = 48; all p < .05). They also had lower satisfaction with their TDM process after controlling for predictors (e.g., patient-provider communication) (p < .001). There were no significant racial differences in perceived control, controlling for covariates. Regardless of race, patients who reported quality patient-provider communication reported less decisional conflict. These patients also reported increased satisfaction and perceived control. The disparities Chinese immigrant cancer patients experienced in the TDM process may be related to their cultural communication style with providers. Facilitating Chinese patients' communication and partnership with providers may reduce decisional conflicts and increase their TDM outcomes.

Deviation from consensus contouring guidelines predicts inferior local control after spine stereotactic body radiotherapy.

BACKGROUND AND PURPOSE: To analyze the impact of target delineation on local control (LC) after stereotactic body radiotherapy (SBRT) for spine metastasis. MATERIALS AND METHODS: Patients with de novo metastasis of the spine treated with SBRT, excluding those with prostate or hematologic malignancies, were retrospectively reviewed. Deviations from consensus contouring guidelines included incomplete coverage of involved vertebral compartments, omission of adjacent compartments, or unnecessary circumferential coverage. Univariable and multivariable Cox proportional hazard analyses were performed using death as a competing risk. RESULTS: 283 patients with 360 discrete lesions were included with a median follow up of 14.6 months (range 1.2-131.3). The prescription dose was 24-27 Gy in 2-3 fractions for the majority of lesions. Median survival after SBRT was 18.3 months (95 % confidence interval [CI]: 14.8-22.8). The 1 and 2-year local control (LC) rates were 81.1 % (95 % CI: 75.5-85.6 %) and 70.6 % (95 % CI: 63.2-76.8 %), respectively. In total, 60 deviations (16.7 %) from consensus contouring guidelines were identified. Deviation from guidelines was associated with inferior LC (1-year LC 63.0 % vs 85.5 %, p < 0.001). Gastrointestinal primary, epidural extension, and paraspinal extension were all associated with inferior LC on univariable analyses. After adjusting for confounding factors, deviation from guidelines was the strongest predictor of inferior LC (HR 3.52, 95 % CI: 2.11-5.86, p < 0.001). Among guideline-compliant treatments, progressions were mainly in field (61 %) and/or epidural (49 %), while marginal (42 %) and/or epidural progressions (58 %) were most common for those with deviations. CONCLUSIONS: Adherence to consensus contouring guidelines for spine SBRT is associated with superior LC and fewer marginal misses.

Determinants of Hypertension Among Patients With Type 2 Diabetes Mellitus in Karachi, Pakistan: A Cross-Sectional Study.

INTRODUCTION: Hypertension is the persistent rise of systemic arterial blood pressure. Among diabetic patients, hypertension is one of the important public health challenges. The frequency of hypertension among diabetic patients is almost twice than that of non-diabetic patients. This study aims to determine the determinants of hypertension among type 2 diabetes patients in Karachi, Pakistan. METHODOLOGY: This was a cross-sectional study conducted in diabetic clinics of a tertiary care hospital from August 2020 to August 2021. The source population included all adult patients with type 2 diabetes at the follow-up clinic of Liaquat National Hospital and Aga Khan Hospital. Data collection was done using a structured interviewer-administered questionnaire. REDCap software (Vanderbilt University, Nashville, TN) was used for the data collection. RESULTS: A total of 610 patients were included in the study. The mean age of participants was 57.37 (±11.32) years. The overall prevalence of hypertension among diabetic patients was 39.84%. Age, physical activity, family history of hypertension, smoking status, BMI, sedentary lifestyle, stress level, and serum creatinine were independent determinants of hypertension among people with type 2 diabetes mellitus. CONCLUSION: In this study, age, physical activity, family history of hypertension, smoking status, BMI, sedentary lifestyle, stress level, and serum creatinine are independent determinants of hypertension among type 2 diabetes patients. The findings of the study call for strategies that can target these predictors, and clinicians need to start educating their patients about hypertension and ways to prevent it.

Effective use of weight-based enoxaparin for deep vein thrombosis chemoprophylaxis in patients with traumatic brain injury.

BACKGROUND: Enoxaparin is the recommended agent for deep vein thrombosis (DVT) chemoprophylaxis in trauma patients. Current literature suggests weight-based dosing is superior to standard dosing for adequate chemoprophylaxis. Literature regarding the use of weight-based enoxaparin in the setting of traumatic brain injury (TBI) however is limited. METHODS: A retrospective analysis of adult trauma patients admitted between January 1, 2018 to February 28, 2019 was performed. Sixty-six patients with TBI receiving weight-based enoxaparin met inclusion criteria. Incidence of intracranial hemorrhage (ICH) expansion was the primary endpoint. Newly diagnosed venous thromboembolism (VTE) and death were secondary endpoints. RESULTS: Two patients, out of sixty-six, had progression of their TBI requiring surgical intervention. Newly diagnosed VTE occurred in one patient. No deaths were due to ICH expansion or VTE. CONCLUSIONS: Use of weight-based enoxaparin dosing in the setting of TBI shows promise without an increased incidence of ICH expansion when compared to other studies. Level of Evidence and Study Type: Level IV, Therapeutic.

Achievement of goal anti-Xa activity with weight-based enoxaparin dosing for venous thromboembolism prophylaxis in trauma patients.

STUDY OBJECTIVE: The purpose of this study was to evaluate the utility of routine anti-Xa peak monitoring for trauma patients initiated on weight-based enoxaparin for venous thromboembolism (VTE) prophylaxis and identify patient populations where monitoring is necessary. DESIGN: Retrospective study. SETTING: Augusta University (AU) Medical Center in Augusta, Georgia, a level 1 trauma center. PATIENTS: Adult patients admitted to the trauma surgery service requiring chemical VTE prophylaxis. INTERVENTION: At least three consecutive doses of enoxaparin 0.5 mg/kg subcutaneously every 12 hour for VTE prophylaxis prior to an anti-Xa peak as the initial chemical VTE prophylaxis strategy. MEASUREMENTS: The primary end point was the percentage of patients who achieved goal anti-Xa peak of 0.2-0.6 unit/ml. The incidence of newly diagnosed VTE and clinically significant bleeding were assessed as secondary end points. MAIN RESULTS: From January 1, 2018, through February 28, 2019, 300 patients met inclusion criteria. Anti-Xa peaks were within goal in 91% of all patients, 7.7% were below goal, and 1.3% were above goal. For patients who did not meet the goal, dose adjustments were made in 70.4% of patients. New levels were obtained in 73.7% of those patients, and all repeat levels was within goal. Clinically significant bleeding occurred in 5.3% of patients. Newly diagnosed VTE occurred in 1.7% of patients. CONCLUSIONS: The use of initial weight-based enoxaparin dosing in trauma patients routinely achieved the prespecified target anti-Xa goal. In conclusion, anti-Xa levels are not necessary for routine monitoring of weight-based enoxaparin for VTE prophylaxis in trauma patients. Incidence of clinically significant bleeding and newly diagnosed VTE were similar to previous studies.

Normal tissue complication probability of vertebral compression fracture after stereotactic body radiotherapy for de novo spine metastasis.

OBJECTIVE: Stereotactic body radiotherapy (SBRT) for spine metastases is associated with post-treatment vertebral compression fracture (VCF). The purpose of this study is to identify clinical and radiation planning characteristics that predict post-SBRT VCF through a novel normal tissue complication probability (NTCP) analysis. METHODS: Patients with de novo spine metastases treated with SBRT between 2009 and 2018 at a single institution were included. Those who had surgical stabilization or radiation to the same site prior to SBRT were excluded. VCF was defined as new development or progression of existing vertebral body height loss not attributable to tumor growth. Probit NTCP models were constructed and fitted using a maximum likelihood approach. A multivariate proportional hazard model was used to estimate time to VCF using the Fine and Gray method. RESULTS: Three hundred and two vertebral segments from 193 patients were treated with a median dose of 24 Gy in 3 fractions (range 15-30 Gy in 1-5 fractions). With a median follow up of 13.9 months, local control was 89.3% at 1 year. A total of 26 SBRT-induced VCFs were observed, with 1 and 2-year cumulative incidences of 4.6% and 6.7%. NTCP modeling demonstrated a steep response of VCF risk to the dose to 80% and 50% volume of the planning target volume (PTV D80% and D50%), but not maximum dose or dose to 1 cc or 10% of PTV. D80% of 25 Gy and D50% of 28 Gy in 3 fractions corresponded to 10% VCF risk. On multivariate analysis, lower body mass index (HR 0.90 per unit increase, p = 0.04), total spinal instability neoplastic score (SINS, HR 2.44 unstable vs stable, p = 0.04), and PTV D80% (HR 1.11 for every Gy increase, p = 0.003) were associated with increased VCF risk. CONCLUSIONS: SBRT provides excellent tumor control for spinal metastases and is associated with low rate of VCF in our cohort. NTCP modeling suggests that the larger volume of spine receiving lower doses are more closely associated with post-SBRT VCF than high dose regions. Under current target delineation methods, common SBRT regimens such as 24 Gy in 2 fractions or 27 Gy in 3 fractions may be inherently associated with VCF risk of 10% or greater. Consensus contouring guidelines should be reevaluated to minimize the volume of irradiated spine in light of these new data.

Tumor-Treating Field Arrays Do Not Reduce Target Volume Coverage for Glioblastoma Radiation Therapy.

PURPOSE: To inform development of procedures for using tumor-treating field arrays (TTFields) during glioblastoma radiation therapy by determining whether the placement and repositioning of arrays affects target volume coverage and cranial skin dose. METHODS AND MATERIALS: Radiation plans from 10 consecutive patients treated for glioblastoma were copied to a cranial phantom and reoptimized for phantom anatomy. Dose distributions were then recalculated on 3 additional computed tomographic scans of the phantom with the TTFields electrode arrays placed over distinct locations on the phantom scalp to compare planning target volume (PTV) coverage and skin dose with and without TTFields in place in varying positions. Percent depth dose curves were also measured for radiation beams passing through the electrodes and compared with commonly used bolus material. RESULTS: The presence of TTFields arrays decreased PTV V97% and D97% by as much as 1.7% and 2.7%, respectively, for a single array position, but this decrease was mitigated by array repositioning. On averaging the 3 array positions, there was no statistically significant difference in any dosimetric parameter of PTV coverage (V95-97%, D95-97%) across all cases compared with no array. Mean increases in skin D1cc and D20cc of 3.1% were calculated for the cohort. Surface dose for TTFields electrodes was less than that with a 5-mm superflab bolus. CONCLUSIONS: Our work demonstrates that placement of TTFields arrays does not significantly affect target volume coverage. We show that repositioning of TTFields arrays, as is required in clinical use, further minimizes any dosimetric changes and eliminates the need for replanning when arrays are moved. A slight, expected bolus effect is observed, but the calculated increases in skin dose are not clinically significant. These data support the development of clinical trials to assess the safety and efficacy of combining concurrent chemoradiotherapy with TTFields therapy for glioblastoma.

Talking about cancer: Explaining differences in social support among Chinese American and European American breast cancer survivors.

Cultural models of emotional disclosure and its impact on seeking support are understudied in the context of cancer diagnosis. We argue that two different cultural norms must be considered: (1) the importance of emotional disclosure and (2) attitudes toward seeking support from loved ones. Our interviews with 37 foreign-born Chinese American and 23 European American breast cancer survivors revealed differences in disclosure of cancer diagnosis and perception of social support. Both Chinese American and European American survivors receive and provide emotional and social support with loved ones, but their manifestations of disclosure and help-seeking behaviors are culturally specific.

Updated risk models demonstrate low risk of symptomatic radionecrosis following stereotactic radiosurgery for brain metastases.

BACKGROUND: Improvements in systemic therapy continue to increase survival for patients with brain metastases. Updated dosimetric models are required to optimize long-term safety of stereotactic radiosurgery (SRS) for this indication. METHODS: Patients at a single institution receiving SRS from December 2011 to December 2014 were retrospectively reviewed. Patients with radiographic progression of at least one lesion, and with at least 6 months of follow-up from the start of SRS were included. Grade 3 necrosis was defined as requiring surgical intervention. This data were combined with two additional published datasets to construct logistic models describing necrosis risk as a function of dose and volume. RESULTS: From our institution, 294 brain metastases across 57 patients in 139 treatment plans met inclusion criteria. Primary histologies included non-small cell lung cancer (n = 19), melanoma (n = 13), breast carcinoma (n = 9), renal cell carcinoma (n = 7), and other (n = 9). Median follow-up from SRS of first cranial metastasis was 21.7 months (range: 6.3-56.6) and median overall survival was 25.6 months (range: 6.5-56.6). There were eight cases of Grade 1-2 and two cases of Grade 3 necrosis. As a useful clinical reference point, 20 cc of total brain receiving a single-fraction equivalent dose ≥14 Gy corresponded to 12.1% risk for Grade 1-3 (P < 0.003) and 3.4% risk for Grade 3 necrosis (P < 0.001). CONCLUSIONS: These results compare favorably with the QUANTEC brain tolerance estimates for radiosurgery, providing optimism for lower toxicity in the modern era. Additional studies are needed to determine dose tolerance parameters across a broad spectrum of patients.

Factors associated with Chinese American and White cancer survivors' physical and psychological functioning.

OBJECTIVE: To examine whether health-related stressors and resources are associated with physical function, depression, and anxiety in Chinese American and White breast cancer survivors. METHOD: During 2011-2013, this cross-sectional study enrolled Chinese American and White women from California cancer registries diagnosed with Stage 0-III breast cancer between 2006 and 2012. Survivors completed a telephone survey assessing health-related factors including comorbidity, treatment-related symptoms, medical communication, perceived threat, use of coping, and social support resources. Outcomes were assessed using the Patient-Reported Outcome Measurement Information System® (PROMIS®) short forms. Chinese were classified as low- or high-acculturated based on English proficiency, years in the United States, and interview language. Analyses were conducted using Tobit regression models. RESULTS: Low-acculturated Chinese (n = 136) had worse physical functioning than Whites (n = 216), controlling for demographics, cancer stage, and time since diagnosis (ß = -3.33, p = .01). This disparity was attenuated after adjusting for comorbidity and symptoms (ß = -1.63, p = .18). Perceived threat, disengagement coping, and lack of social support were associated with poorer psychological outcomes, regardless of ethnicity. Although low-acculturated Chinese had lower scores on all health-related factors than Whites, the former reported significantly lower level of depression (ß = -3.23) and anxiety (ß = -5.8) after adjusting for covariates (both p < .05). High-acculturated Chinese (n = 84) did not differ from Whites except that the former had significantly lower anxiety. CONCLUSION: Low-acculturated Chinese may benefit from interventions aimed to improve their physical problems. However, despite experiencing greater psychosocial stress, they reported better emotional functioning. Whether Chinese culture shapes this resiliency, or if it is a reporting bias will need further investigation. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Distinguishing True Progression From Radionecrosis After Stereotactic Radiation Therapy for Brain Metastases With Machine Learning and Radiomics.

PURPOSE: Treatment effect or radiation necrosis after stereotactic radiosurgery (SRS) for brain metastases is a common phenomenon often indistinguishable from true progression. Radiomics is an emerging field that promises to improve on conventional imaging. In this study, we sought to apply a radiomics-based prediction model to the problem of diagnosing treatment effect after SRS. METHODS AND MATERIALS: We included patients in the Johns Hopkins Health System who were treated with SRS for brain metastases who subsequently underwent resection for symptomatic growth. We also included cases of likely treatment effect in which lesions grew but subsequently regressed spontaneously. Lesions were segmented semiautomatically on preoperative T1 postcontrast and T2 fluid-attenuated inversion recovery magnetic resonance imaging, and radiomic features were extracted with software developed in-house. Top-performing features on univariate logistic regression were entered into a hybrid feature selection/classification model, IsoSVM, with parameter optimization and further feature selection performed using leave-one-out cross-validation. Final model performance was assessed by 10-fold cross-validation with 100 repeats. All cases were independently reviewed by a board-certified neuroradiologist for comparison. RESULTS: We identified 82 treated lesions across 66 patients, with 77 lesions having pathologic confirmation. There were 51 radiomic features extracted per segmented lesion on each magnetic resonance imaging sequence. An optimized IsoSVM classifier based on top-ranked radiomic features had sensitivity and specificity of 65.38% and 86.67%, respectively, with an area under the curve of 0.81 on leave-one-out cross-validation. Only 73% of cases were classifiable by the neuroradiologist, with a sensitivity of 97% and specificity of 19%. CONCLUSIONS: Radiomics holds promise for differentiating between treatment effect and true progression in brain metastases treated with SRS. A predictive model built on radiomic features from an institutional cohort performed well on cross-validation testing. These results warrant further validation in independent datasets. Such work could prove invaluable for guiding management of individual patients and assessing outcomes of novel interventions.

Interventional Radiation Oncology (IRO): Transition of a magnetic resonance simulator to a brachytherapy suite.

PURPOSE: As a core component of a new gynecologic cancer radiation program, we envisioned, structured, and implemented a novel Interventional Radiation Oncology (IRO) unit and magnetic resonance (MR)-brachytherapy environment in an existing MR simulator. METHODS AND MATERIALS: We describe the external and internal processes required over a 6-8 month time frame to develop a clinical and research program for gynecologic brachytherapy and to successfully convert an MR simulator into an IRO unit. RESULTS: Support of the institution and department resulted in conversion of an MR simulator to a procedural suite. Development of the MR gynecologic brachytherapy program required novel equipment, staffing, infrastructural development, and cooperative team development with anesthetists, nurses, therapists, physicists, and physicians to ensure a safe and functional environment. Creation of a separate IRO unit permitted a novel billing structure. CONCLUSIONS: The creation of an MR-brachytherapy environment in an MR simulator is feasible. Developing infrastructure includes several collaborative elements. Unique to the field of radiation oncology, formalizing the space as an Interventional Radiation Oncology unit permits a sustainable financial structure.

The role of spousal relationships in fibromyalgia patients' quality of life.

Fibromyalgia (FM) is a chronic pain syndrome that includes debilitating symptoms such as widespread pain and tenderness, fatigue, and poor physical functioning. Research has shown FM patients' choice of coping style and relationship quality with their spouse can impact their mental quality of life (QoL), but no known study has examined the protective nature of relationship quality and coping behaviors on both patient physical and mental QoL in the context of chronic pain. We examined 204 patients with FM on the (a) roles of coping styles and relationship quality on patient quality of life, and (b) moderating effect of relationship quality on the association between negative coping style and patient QoL. A series of multiple regressions found patients' coping styles were not significantly associated with physical QoL, but were significantly associated with mental QoL. Patients' relationship quality with their spouse was significantly associated with mental QoL, but not physical QoL and no significant interactions with negative coping style were found. Our results emphasize the importance of coping styles and relationship quality between patients and their spouses in the context of chronic pain. Clinicians can incorporate the patient's relationship as part of a more holistic approach to care and improving outcomes.

Independent test of a model to predict severe acute esophagitis.

PURPOSE: Treatment planning factors are known to affect the risk of severe acute esophagitis during thoracic radiation therapy. We tested a previously published model to predict the risk of severe acute esophagitis on an independent data set. METHODS AND MATERIALS: The data set consists of data from patients who had recoverable treatment plans and received definitive radiation therapy for non-small cell carcinoma of the lung at a single institution between November 2004 and January 2010. Complete esophagus dose-volume and available clinical information was extracted using our in-house software. The previously published model was a logistic function with a combination of mean esophageal dose and use of concurrent chemotherapy. In addition to testing the previous model, we used a novel, machine learning-based method to build a maximally predictive model. RESULTS: Ninety-four patients (81.7%) developed Common Terminology Criteria for Adverse Events, Version 4, Grade 2 or more severe esophagitis (Grade 2: n = 79 and Grade 3: n = 15). Univariate analysis revealed that the most statistically significant dose-volume parameters included percentage of esophagus volume receiving ≥40 to 60 Gy, minimum dose to the highest 20% of esophagus volume (D20) to D35, and mean dose. Other significant predictors included concurrent chemotherapy and patient age. The previously published model predicted risk effectively with a Spearman's rank correlation coefficient (rs) of 0.43 (P < .001) with good calibration (Hosmer-Lemeshow goodness of fit: P = .537). A new model that was built from the current data set found the same variables, yielding an rs of 0.43 (P < .001) with a logistic function of 0.0853 × mean esophageal dose [Gy] + 1.49 × concurrent chemotherapy [1/0] - 1.75 and Hosmer-Lemeshow P = .659. A novel preconditioned least absolute shrinkage and selection operator method yielded an average rs of 0.38 on 100 bootstrapped data sets. CONCLUSIONS: The previously published model was validated on an independent data set and determined to be nearly as predictive as the best possible two-parameter logistic model even though it overpredicted risk systematically. A novel, machine learning-based model using a bootstrapping approach showed reasonable predictive power.

Perceptions, expectations, and attitudes about communication with physicians among Chinese American and non-Hispanic white women with early stage breast cancer.

PURPOSE: Asian Americans have consistently reported poorer communication with physicians compared with non-Hispanic Whites (NHW). This qualitative study sought to elucidate the similarities and differences in communication with physicians between Chinese and NHW breast cancer survivors. METHODS: Forty-four Chinese and 28 NHW women with early stage breast cancer (stage 0-IIa) from the Greater Bay Area Cancer Registry participated in focus group discussions or individual interviews. We oversampled Chinese women because little is known about their cancer care experiences. In both interview formats, questions explored patients' experiences and feelings when communicating with physicians about their diagnosis, treatment, and follow-up care. RESULTS: Physician empathy at the time of diagnosis was important to both ethnic groups; however, during treatment and follow-up care, physicians' ability to treat cancer and alleviate physical symptoms was a higher priority. NHW and US-born Chinese survivors were more likely to assert their needs, whereas Chinese immigrants accepted physician advice even when it did not alleviate physical problems (e.g., pain). Patients viewed all physicians as the primary source for information about cancer care. Many Chinese immigrants sought additional information from primary care physicians and stressed optimal communication over language concordance. CONCLUSIONS: Physician empathy and precise information were important for cancer patients. Cultural differences such as the Western emphasis on individual autonomy vs. Chinese emphasis on respect and hierarchy can be the basis for the varied approaches to physician communication we observed. Interventions based on cultural understanding can foster more effective communication between immigrant patients and physicians ultimately improving patient outcomes.

A mixed method exploration of survivorship among Chinese American and non-Hispanic White breast cancer survivors: the role of socioeconomic well-being.

PURPOSE: Cancer-related stress is heavily influenced by culture. This study explored similarities and differences in survivorship care concerns among Chinese American and non-Hispanic White (NHW) breast cancer survivors. METHODS: A sequential, mixed-method design (inductive/qualitative research-phase I and deductive/quantitative research-phase II) was employed. Eligible women identified from the Greater Bay Area Cancer Registry were age ≥21, diagnosed with stage 0-IIa breast cancer between 2006 and 2011, and had no recurrence or other cancers. In phase I, we conducted 4 Chinese (n = 19) and 4 NHW (n = 22) focus groups, and 31 individual telephone interviews (18 Chinese immigrants, 7 Chinese US-born, and 6 NHW). Content analysis was conducted to examine qualitative data. In phase II, another 296 survivors (148 NHW age-matched to 148 Chinese cases) completed a cross-sectional survey. Descriptive statistics and linear regression analysis were conducted to examine quantitative data. RESULTS: Qualitative data revealed "socioeconomic well-being" (SWB) as a dominant survivorship concern, which was operationalized as a cancer survivor's perceived economic and social resources available to access care. Quantitative data showed that low-acculturated Chinese immigrants reported the poorest SWB, controlling for covariates. Highly acculturated Chinese immigrants and the US-born Chinese/NHW group reported similar SWB. Women who had low-income levels or chemotherapy had poorer SWB. CONCLUSIONS: SWB emerged as an important aspect of breast cancer survivorship. Immigration stress, cancer care costs, and cultural values all contributed to immigrants' socioeconomic distress. Immigrant and US-born breast cancer survivors experienced different socioeconomic circumstances and well-being following treatment. Our findings warrant further investigation of socioeconomic distress and survivorship outcomes.

Physical distress and cancer care experiences among Chinese-American and non-Hispanic White breast cancer survivors.

OBJECTIVE: The number of Chinese-American breast cancer survivors (BCS) is increasing as a result of increasing incidence rates. There has been little research on Chinese BCS' follow-up cancer care. This qualitative study aims to understand how Chinese-American BCS experience and cope with physical distress relative to non-Hispanic White (NHW) survivors. METHODS: Seventy-one BCS (37 Chinese immigrant, 7 US-born Chinese, 27 NHW) were recruited from the Greater Bay Area Cancer Registry to participate in focus group discussions or one-on-one interviews about their survivorship experiences. All BCS were diagnosed with breast cancer at stage 0-IIA between 2006 and 2009, and had survived for 1-4 years without recurrence. Interviews were conducted in Cantonese, Mandarin, or English. Data analyses followed established qualitative methods of content analysis. RESULTS: BCS experienced pain and side effects from radiation, surgery, and hormonal therapy. Physical distress subsequently caused emotional concerns about recurrence or metastasis. Most BCS consulted physicians about their physical distress. Chinese immigrant BCS were less likely to have their issues resolved compared to NHW and US-born Chinese who were more likely to question physicians, ask for referrals, and make repeat attempts if their problems were not resolved. Some Chinese immigrant BCS turned to Traditional Chinese Medicine for relief or accepted the idea that physical distress was part of survivorship. CONCLUSION: Chinese immigrant BCS may be at risk for greater distress compared with US-born Chinese and NHW BCS because of cultural norms that make them less inclined to express their needs to physicians or challenge physicians when their needs are not met. Furthermore, they may express symptoms in culturally unique ways (e.g., hot-cold imbalances). Further research is needed to determine how to best improve survivorship care experiences in this understudied population, with the goal of decreasing BCS' physical distress and improving quality of life.

Modeling the risk of radiation-induced acute esophagitis for combined Washington University and RTOG trial 93-11 lung cancer patients.

PURPOSE: To construct a maximally predictive model of the risk of severe acute esophagitis (AE) for patients who receive definitive radiation therapy (RT) for non-small-cell lung cancer. METHODS AND MATERIALS: The dataset includes Washington University and RTOG 93-11 clinical trial data (events/patients: 120/374, WUSTL = 101/237, RTOG9311 = 19/137). Statistical model building was performed based on dosimetric and clinical parameters (patient age, sex, weight loss, pretreatment chemotherapy, concurrent chemotherapy, fraction size). A wide range of dose-volume parameters were extracted from dearchived treatment plans, including Dx, Vx, MOHx (mean of hottest x% volume), MOCx (mean of coldest x% volume), and gEUD (generalized equivalent uniform dose) values. RESULTS: The most significant single parameters for predicting acute esophagitis (RTOG Grade 2 or greater) were MOH85, mean esophagus dose (MED), and V30. A superior-inferior weighted dose-center position was derived but not found to be significant. Fraction size was found to be significant on univariate logistic analysis (Spearman R = 0.421, p < 0.00001) but not multivariate logistic modeling. Cross-validation model building was used to determine that an optimal model size needed only two parameters (MOH85 and concurrent chemotherapy, robustly selected on bootstrap model-rebuilding). Mean esophagus dose (MED) is preferred instead of MOH85, as it gives nearly the same statistical performance and is easier to compute. AE risk is given as a logistic function of (0.0688 MED+1.50 ConChemo-3.13), where MED is in Gy and ConChemo is either 1 (yes) if concurrent chemotherapy was given, or 0 (no). This model correlates to the observed risk of AE with a Spearman coefficient of 0.629 (p < 0.000001). CONCLUSIONS: Multivariate statistical model building with cross-validation suggests that a two-variable logistic model based on mean dose and the use of concurrent chemotherapy robustly predicts acute esophagitis risk in combined-data WUSTL and RTOG 93-11 trial datasets.