Detecting the Dark Matter of Unpublished Clinical Cancer Studies: An Analysis of Phase 3 Randomized Controlled Trials.

Unpublished randomized controlled trial (RCT) frequency, correlates, and financial impact are not well understood. We sought to characterize the nonpublication of peer-reviewed manuscripts among interventional, therapeutic, multi-arm, phase 3 oncology RCTs. Trials were identified by searching ClinicalTrials.

Racial and Ethnic Disparities Among Participants in US-Based Phase 3 Randomized Cancer Clinical Trials.

Although improving representation of racial and ethnic groups in United States clinical trials has been a focus of federal initiatives for nearly 3 decades, the status of racial and ethnic minority enrollment on cancer trials is largely unknown. We used a broad collection of phase 3 cancer trials derived from ClinicalTrials.gov to evaluate racial and ethnic enrollment among US cancer trials.

Performance Status Restriction in Phase III Cancer Clinical Trials.

Background: Patients with good performance status (PS) tend to be favored in randomized clinical trials (RCTs), possibly limiting the generalizability of trial findings. We aimed to characterize trial-related factors associated with the use of PS eligibility criteria and analyze patient accrual breakdown by PS.

Methods: Adult, therapeutic, multiarm phase III cancer-specific RCTs were identified through ClinicalTrials.

Trial Sponsorship and Time to Reporting for Phase 3 Randomized Cancer Clinical Trials.

The pace of clinical trial data generation and publication is an area of interest within clinical oncology; however, little is known about the dynamics and covariates of time to reporting (TTR) of trial results. To assess these, ClinicalTrials.gov was queried for phase three clinical trials for patients with metastatic solid tumors, and the factors associated with TTR from enrollment completion to publication were analyzed.

Professional Medical Writer Assistance in Oncology Clinical Trials.

Background: The use of professional medical writers (PMWs) has been historically low, but contemporary data regarding PMW usage are scarce. In this study, we sought to quantify PMW use in oncologic phase III randomized controlled trials (RCTs).

Methods: We performed a database query through ClinicalTrials.

Progression-free survival is a suboptimal predictor for overall survival among metastatic solid tumour clinical trials.

Background: The use of overall survival (OS) as the gold standard primary end-point (PEP) in metastatic oncologic randomised controlled trials (RCTs) has declined in favour of progression-free survival (PFS) without a complete understanding of the degree to which PFS reliably predicts for OS.

Methods: Using ClinicalTrials.gov, we identified 1239 phase III oncologic RCTs, 260 of which were metastatic solid tumour trials with a superiority-design investigating a therapeutic intervention by using either a PFS or OS PEP.

Exclusion of Men from Randomized Phase III Breast Cancer Clinical Trials.

Male breast cancer treatment regimens are often extrapolated from female-based studies because of a paucity of literature analyzing male breast cancer. Using ClinicalTrials.gov, we analyzed breast cancer randomized clinical trials (RCTs) to determine which factors were associated with male-gender inclusion.

Non-English language validation of patient-reported outcome measures in cancer clinical trials.

Patient-reported outcome measures (PROMs) are increasingly incorporated as endpoints in oncology clinical trials but are often only validated in English. ClinicalTrials.gov was queried for cancer-specific randomized control trials (RCTs) addressing a therapeutic intervention and enrolling primarily in the USA.

Decreasing incidence of upper age restriction enrollment criteria among cancer clinical trials.

Background: Age disparities among cancer clinical trial participants are pervasive and worsening over time. Identification of factors associated with age disparities is critical to improve enrollment of older patients on trials. The incidence and impact of trial eligibility criteria that exclude patients on the basis of age remains opaque.

Women's Representation Among Lead Investigators of Clinical Trials in Oncology.

This database study assesses the number of female lead investigators of randomized clinical trials registered in ClinicalTrials.gov.

Sex-Based Disparities Among Cancer Clinical Trial Participants.

Landmark investigation two decades ago demonstrated sex-based disparities among participants in cancer cooperative group trials. Although federal efforts have aimed to improve representation of female patients in government-sponsored research, less is known about sex disparities in the broader landscape of modern oncologic randomized controlled trials. Using ClinicalTrials.

The Trials (and Tribulations) of Complementary and Alternative Medicine in Oncology.

Two decades following the creation of the Office of Cancer Complementary and Alternative Medicine at the National Cancer Institute, the status of complementary and alternative medicine (CAM) research within oncology remains opaque. To better understand the landscape of CAM studies in oncology, we identified CAM-related phase III randomized controlled trials (RCTs) through ClinicalTrials.gov and compared these CAM trials to all non-CAM oncologic RCTs.

Factors Associated With Age Disparities Among Cancer Clinical Trial Participants.

Importance: Seminal investigation 2 decades ago alerted the oncology community to age disparities in participation in cooperative group trials; less is known about whether these disparities persist in industry-funded research.

Objective: To characterize the age disparities among trial enrollees on randomized clinical trials (RCTs) of common cancers in clinical oncology and identify factors associated with wider age imbalances.

Data Sources: Phase 3 clinical oncology RCTs were identified through ClinicalTrials.

Allergic contact dermatitis related to homemade slime: a case and review of the literature.

Slime has become extremely popular as a children's toy in recent years and is typically made with various household substances. Although reports of slime causing skin irritation are not uncommon, case reports of slime-induced allergic contact dermatitis have only recently surfaced. We present a case of a child with hand dermatitis, history of exposure to slime, and positive allergen patch testing to two ingredients found in slime.

Radiation-Induced Lung Injury: Assessment and Management.

Radiation-induced lung injury (RILI) encompasses any lung toxicity induced by radiation therapy (RT) and manifests acutely as radiation pneumonitis and chronically as radiation pulmonary fibrosis. Because most patients with thoracic and breast malignancies are expected to undergo RT in their lifetime, many with curative intent, the population at risk is significant. Furthermore, indications for thoracic RT are expanding given the advent of stereotactic body radiation therapy (SBRT) or stereotactic ablative radiotherapy (SABR) for early-stage lung cancer in nonsurgical candidates as well as oligometastatic pulmonary disease from any solid tumor.

Stereotactic Radiosurgery Versus Whole Brain Radiation Therapy: A Propensity Score Analysis and Predictors of Care for Patients With Brain Metastases From Breast Cancer.

Background: Metastases to the brain occur in 10%-16% of patients with breast cancer, with incidence reportedly increasing. Historically, brain metastases (BM) have been treated with whole-brain radiation therapy (WBRT), but stereotactic radiosurgery (SRS) is an increasingly favored treatment option. In this study we used a population-level database to compare patterns of care and survival between WBRT and SRS for BM from breast cancer.

A possible explanation for the peripheral selectivity of a novel non-steroidal pure antiandrogen, Casodex (ICI 176,334).

The in vivo antiandrogenicity of Casodex has been confirmed and characterised. Androgen receptor (AR) binding assays of rat ventral prostate gland cytosols revealed a relative binding affinity (RBA) for the AR of 0.267 and a k1 of 1.

Limitations in the use of tritiated methyltrienolone for the photoaffinity labelling of androgen receptor proteins.

In the absence of photoexcitation and under conditions of low ionic strength, the native form of the androgen receptor in rat prostate sediments as a large, 9.2S complex with tritiated androgens, including [3H]methyltrienolone. On photoexcitation, the configuration of labelled receptor complexes changes to a form of lower sedimentation coefficient, 4.

Enhanced transcription of rRNA genes by purified androgen receptor complexes in vitro.

Androgens stringently regulate the concentrations of the polyamines, spermine and spermidine, in rat ventral prostate. The intracellular distribution of the polyamines is also dependent on the androgenic milieu; a small proportion of polyamines is associated tightly with the nucleus. Soluble nucleolar chromatin contains RNA polymerase A and protein kinase activities, both of which are regulated by androgens and markedly stimulated by polyamines.