Publications by authors named "Katherine Guthrie"

Purpose: SWOG S1815 was a randomized, open label phase III trial, evaluating gemcitabine, nab-paclitaxel, and cisplatin (GAP) versus gemcitabine and cisplatin (GC) in patients with newly diagnosed advanced biliary tract cancers (BTCs).

Methods: Patients with newly diagnosed locally advanced unresectable or metastatic BTC, including intrahepatic cholangiocarcinoma (ICC) and extrahepatic cholangiocarcinoma (ECC) and gallbladder carcinoma (GBC), were randomly assigned 2:1 to either GAP (gemcitabine 800 mg/m, cisplatin 25 mg/m, and nab-paclitaxel 100 mg/m intravenously once per day on days 1 and 8 of a 21-day cycle) or GC (gemcitabine 1,000 mg/m and cisplatin 25 mg/m intravenously once per day on days 1 and 8 of a 21-day cycle).

Results: Among 452 randomly assigned participants, 441 were eligible and analyzable, 67% with ICC, 16% with GBC, and 17% with ECC.

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Objective: Rectal cancer is often treated with surgery such as ostomy or anastomosis. The Bowel Function Instrument (BFI) is a valid and reliable 18-item measure of physical bowel symptoms. Some items on the BFI do not apply to those with ostomies.

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Article Synopsis
  • - Lung cancer, diagnosed at a median age of 70, poses serious health challenges for older Americans, particularly after surgery, where patients face issues like pain and diminished physical function.
  • - A study involving 382 older adults with lung cancer will compare two approaches: telephone-based physical activity coaching versus self-monitoring of physical activity, focusing on their impact on functional capacity and quality of life.
  • - The primary goal is to see if coaching can improve patients' performance on a 6-minute walk test and overall well-being 30 days post-surgery, while also addressing the needs of their family caregivers.
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We tested the feasibility and preliminary efficacy of an online diet and physical activity program for women with early-stage breast cancer who had completed surgery, chemotherapy, and radiation therapy (ongoing endocrine therapy allowed). Participants with low fruit and vegetable (F/V) consumption and/or low moderate-to-vigorous physical activity (MVPA) levels were randomized to one of two doses - low (one Zoom group session) or high (12 Zoom group sessions) - of an online lifestyle program with the goal of improving F/V intake and MVPA. All participants received eHealth communications (text messages, study website access), a Fitbit, and a WiFi-enabled scale.

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  • The study aims to analyze the characteristics of rectal cancer survivors participating in SWOG S1820, which tests an intervention (AIMS-RC) for managing bowel dysfunction after treatment.* -
  • Participants were selected based on specific criteria including their treatment history and age, with outcomes focusing on bowel function, quality of life, and symptom management motivations.* -
  • The research successfully recruited 117 participants over 29 months, revealing that most had made dietary changes post-surgery and experienced significant bowel problems, highlighting the need for better management strategies.*
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Objective: In premenopausal individuals, vaginal microbiota diversity and lack of Lactobacillus dominance are associated with greater mucosal inflammation, which is linked to a higher risk of cervical dysplasia and infections. It is not known if the association between the vaginal microbiota and inflammation is present after menopause, when the vaginal microbiota is generally higher-diversity and fewer people have Lactobacillus dominance.

Methods: This is a post hoc analysis of a subset of postmenopausal individuals enrolled in a randomized trial for treatment of moderate-severe vulvovaginal discomfort that compared vaginal moisturizer, estradiol, or placebo.

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Background: Neoadjuvant therapy (NT) is increasingly used for patients with pancreatic ductal adenocarcinoma (PDAC), and yet reasons for not undergoing subsequent pancreatectomy are poorly understood. Given the importance of completing multimodality therapy, we investigated factors associated with failure to undergo surgical resection following NT for PDAC.

Methods: SWOG S1505 was a multicenter phase II randomized trial of preoperative mFOLFIRINOX or gemcitabine/nab-paclitaxel prior to planned pancreatectomy for patients with potentially resectable PDAC.

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Background: Sarcopenic obesity and muscle attenuation have been associated with survival in patients with borderline resectable and advanced pancreatic ductal adenocarcinoma (PDA); however, these relationships are unknown for patients with resectable PDA. This study examined the associations between skeletal muscle and adipose tissue as measured on baseline computed tomography (CT) and the overall survival (OS) of participants with resectable PDA in a secondary analysis of the Southwest Oncology Group S1505 clinical trial (identifier: NCT02562716).

Methods: The S1505 phase II clinical trial enrolled patients with resectable PDA who were randomized to receive modified FOLFIRINOX or gemcitabine and nab-paclitaxel as perioperative chemotherapy, followed by surgical resection.

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Background: Survivors of rectal cancer experience persistent bowel dysfunction after treatments. Dietary interventions may be an effective approach for symptom management and posttreatment diet quality. SWOG S1820 was a pilot randomized trial of the Altering Intake, Managing Symptoms in Rectal Cancer (AIMS-RC) intervention for bowel dysfunction in survivors of rectal cancer.

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Background & Aims: Pancreatic ductal adenocarcinoma (PDA) is a highly lethal disease characterized by a spatially heterogeneous tumor microenvironment. Within the PDA microenvironment, cells organize into communities where cell fate is influenced by neighboring cells of diverse ontogeny and function. However, it remains unclear how cell neighborhoods in the tumor microenvironment evolve with treatment and impact clinical outcomes.

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Objective: This study aimed to advance understanding of vasomotor symptom (VMS) outcomes measurement using pooled data from three Menopause Strategies Finding Lasting Answers to Symptoms and Health (MsFLASH) trials.

Methods: Participants self-reported VMS frequency, severity, and bother using daily diaries; completed standardized measures of VMS interference, insomnia severity, and sleep quality/disturbance; and completed four treatment satisfaction items. Analyses included descriptive statistics, Pearson correlations (baseline pooled sample, posttreatment pooled sample, posttreatment placebo only), t tests, and analysis of variance.

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Objective: The aim of the study is to describe the location, severity, and frequency of genitourinary symptoms in postmenopausal women enrolled in a randomized trial of treatment for vulvovaginal discomfort.

Methods: This is a post hoc analysis of enrollment responses for participants in the MsFLASH Vaginal Health Trial. Participants were asked about the severity (0-3), frequency (in days per week) and location (vulvar or vaginal) of itch, dryness, pain/soreness, irritation, as well as severity and frequency of pain with penetration, vaginal discharge, urinary incontinence, and urinary urgency.

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Article Synopsis
  • - Oxaliplatin is a chemotherapy drug used to treat gastrointestinal cancers, but it can cause chemotherapy-induced peripheral neuropathy (CIPN), limiting treatment effectiveness.
  • - A pilot study is being conducted with 56 patients to investigate if acupuncture and acupressure can reduce CIPN and other chemotherapy-related side effects during treatment with 5-fluorouracil (5-FU) and oxaliplatin.
  • - Participants are randomly assigned to receive either acupuncture with self-acupressure or standard treatment, and various symptoms and side effects will be assessed over three months to evaluate the effectiveness and feasibility of this approach.
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Purpose: To assess whether higher plasma 25-hydroxyvitamin D [25(OH)D] is associated with improved outcomes in colon cancer and whether circulating inflammatory cytokines mediate such association.

Experimental Design: Plasma samples were collected from 1,437 patients with stage III colon cancer enrolled in a phase III randomized clinical trial (CALGB/SWOG 80702) from 2010 to 2015, who were followed until 2020. Cox regressions were used to examine associations between plasma 25(OH)D and disease-free survival (DFS), overall survival (OS), and time to recurrence (TTR).

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Importance: The association of chronic inflammation with colorectal cancer recurrence and death is not well understood, and data from large well-designed prospective cohorts are limited.

Objective: To assess the associations of inflammatory biomarkers with survival among patients with stage III colon cancer.

Design, Setting, And Participants: This cohort study was derived from a National Cancer Institute-sponsored adjuvant chemotherapy trial Cancer and Leukemia Group B/Southwest Oncology Group 80702 (CALGB/SWOG 80702) conducted between June 22, 2010, and November 20, 2015, with follow-up ending on August 10, 2020.

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Background: SWOG 0809 is the only prospective study of adjuvant chemotherapy followed by chemoradiation focusing on margin status in patients with extrahepatic cholangiocarcinoma (EHCC) and gallbladder cancer (GBCA); however, the effects of adjuvant therapy by nodal status have never been reported in this population.

Methods: Patients with resected EHCC and GBCA, stage pT2-4, node-positive (N+) or margin-positive (R1) who completed four cycles of chemotherapy followed by radiotherapy were included. Cox regression was used to compare overall survival (OS), disease-free survival (DFS), local recurrence, and distant metastasis by nodal status.

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Importance: Half of women who are postmenopausal have genitourinary discomfort after menopause. Recommended therapies include low-dose vaginal estrogen. Individuals with a history of breast cancer or venous thromboembolism may have concerns about the safety of this intervention.

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Background: The design of a randomized pilot trial evaluating the feasibility of two doses of a digital health intervention promoting changes in nutrition and physical activity in breast cancer (BC) survivors is described.

Methods: Eligible women were adults with history of early-stage breast cancer and > 60 days post-treatment, consumed <5 servings/day of fruits/vegetables and/or engaged in <150 min/week of aerobic moderate-to-vigorous physical activity, and had internet access. Participants were randomized to 6 months of either a "low" (1 session) or "high" (12 sessions) dose digital health intervention.

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Article Synopsis
  • A study investigated a plasmid-based vaccine targeting the ERBB2 protein in patients with advanced-stage ERBB2-positive breast cancer to enhance immune response post-trastuzumab therapy.
  • The trial included 66 participants and assessed safety and immune response to three different doses (10, 100, and 500 μg) of the vaccine, with most side effects being mild.
  • Results showed that the 100 μg and 500 μg doses seemed to generate stronger immune responses, while DNA persistence at the injection site was also monitored over time.
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Objectives: The aim of this study was to quantify changes in serum total estradiol (E2) and estrone (E1) concentrations with initiation of low-dose oral estradiol treatment and evaluate whether changes in concentrations mediate the effect of treatment in reducing vasomotor symptom (VMS) frequency.

Methods: We analyzed baseline and week 8 (W8) data from 171 perimenopausal and postmenopausal women with VMS enrolled in low-dose 17β estradiol ( n = 72) and placebo ( n = 99) groups of a randomized clinical trial.

Results: From baseline to W8, women in the low-dose estradiol group had a fourfold increase in E2, resulting in a W8 E2 of 23 pg/mL, and a fivefold increase in E1, resulting in a W8 E1 of 110.

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Objectives: To evaluate whether single measurements of serum estradiol (E), estrone (E) and sex hormone-binding globulin (SHBG) concentration distinguishes between women with and without menopausal symptom bother.

Study Design: We analyzed baseline data from two clinical trials conducted in 2012-2017: MsFLASH 03 (178 peri-/post-menopausal women aged 40-62 years with bothersome vasomotor symptoms, mean age 54) and MsFLASH 05 (181 post-menopausal women aged 45-70 years with moderate-to-severe vulvovaginal symptoms, mean age 61).

Main Outcome Measures: Symptom bother (hot flushes or flashes, night sweats, sweating, aching in muscles and joints, change in sexual desire, vaginal dryness during intercourse, and avoiding intimacy) in the past month was assessed using the Menopause-Specific Quality of Life questionnaire.

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Importance: Postmenopausal women with genitourinary symptoms of menopause are often prescribed vaginal estradiol or moisturizer for symptom improvement, but the impact of these treatments on the local microenvironment is poorly understood.

Objective: To compare changes in the vaginal microbiota, metabolome, and pH among women using low-dose vaginal estradiol tablet or low pH moisturizer gel for 12-weeks vs low pH placebo.

Design, Setting, And Participants: This is a post hoc prespecified secondary analysis of a 12-week multicenter randomized clinical trial among postmenopausal women with moderate to severe genitourinary symptoms.

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Objective: Evaluate appropriateness of the current Female Sexual Function Index (FSFI)-19 value of <26.6 to designate female sexual dysfunction (FSD) in postmenopausal women, using the Female Sexual Distress-Revised (FSDS-R) scale to measure distress.

Methods: Participant-level data containing standardized measures from five completed Menopause Strategies: Finding Lasting Answers for Symptoms and Health trials was pooled.

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Article Synopsis
  • The study looked at how salivary cortisol levels relate to heart racing feelings in middle-aged women.
  • They checked the data from 293 women, most of whom were around 55 years old and had some distress from palpitations.
  • The results showed that women who felt distress from heart palpitations had lower morning cortisol levels compared to those who didn't have this distress.
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Purpose: Health-related quality of life (HRQOL) is an established prognostic factor for mortality; however, it is unclear if HRQOL is predictive of time to disease progression, a particularly meaningful outcome for patients. We examined the association between HRQOL and progression-free survival (PFS) in SWOG Cancer Research Network clinical trials.

Methods: For this secondary analysis, we reviewed all completed SWOG clinical trials to identify those for patients with advanced cancer that incorporated Functional Assessment of Cancer Therapy (FACT) questionnaires at baseline.

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