Cancer Causes & Control最新文献

Purpose: Lesbian, gay, bisexual, transgender, queer, and other sexual and gender diverse (LGBTQ+) individuals experience disparities in cancer screening. We examined whether experience of LGBTQ+ -related discrimination in medical settings was associated with cancer screening disparities.

Methods: Participants were recruited via social media for a cross-sectional survey study. Those who self-reported as LGBTQ+ , being 40+ years of age, and residing in the US were eligible. Participants reported their clinical and demographic characteristics, cancer screening history, and experiences of discrimination in a medical setting. We examined the odds (OR) of ever undergoing cancer screening by experienced discrimination, stratified by sex assigned at birth.

Results: Participants (n = 310) were on average 54.4 ± 9.0 years old and primarily White (92.9%). Most identified as lesbian (38.1%) or gay (40.0%) while 17.1% were transgender or gender diverse. Nearly half (45.5%) reported experiencing LGBTQ+ -related discrimination in the medical setting. Participants assigned female at birth with discriminatory experiences had significantly lower odds of ever undergoing colonoscopy/sigmoidoscopy compared to those without discriminatory experiences (OR: 0.37; 95% Confidence Interval (CI) 0.15-0.90). No significant differences in colonoscopy/sigmoidoscopy uptake were observed in those assigned male at birth by discriminatory experiences (OR: 2.02; 95% CI 0.59-6.91). Pap tests, mammogram, and stool colorectal cancer screening did not differ by discriminatory experience.

Conclusion: Discrimination in medical settings was commonly reported by LGBTQ+ individuals in this study. When treating LGBTQ+ patients, clinicians should ask about prior experiences and continue to promote cancer screening. Future studies should examine discrimination as a key driver of LGBTQ+ disparities in cancer screening.

Purpose: Smoking after cancer impairs cancer treatment outcomes and prognosis, regardless of cancer type. Prior data suggest that patients with cancers other than lung or head/neck cancer had lower cessation motivation, which in turn predicted lower smoking abstinence. This study evaluated feasibility for a future efficacy trial and assessed the acceptability of brief self-help materials, targeted by cancer type, to enhance cessation motivation.

Methods: Patients had a diagnosis of skin melanoma, breast, bladder, colorectal, or gynecological cancers within ≤ 6 months, smoked ≥ 1 cigarette in the past month, and were not currently participating in a cessation program. After completing a baseline assessment, participants received the booklet corresponding to their cancer type. Follow-ups were conducted 1 week and 1 month post-intervention.

Results: Among 118 patients potentially eligible, 109 were successfully contacted and 53 patients were eligible and all consented. Among consenting patients, 92.5% completed baseline, and 90.6% received the intervention. Among patients receiving the intervention, 91.7% completed all study procedures and follow-up. At 1 month, 87.5% reported reading the booklet and 92.8% rated it as good/excellent. Motivation to quit smoking increased over time among those with lower motivation at baseline, 33.3% sought smoking cessation assistance, and 25.0% were smoke-free 1 month post-intervention.

Conclusion: This study demonstrated the feasibility and acceptability of the first intervention developed for patients with cancers not typically associated with smoking. This low-cost and easy to disseminate intervention has potential to increase motivation to quit smoking among patients with cancers not typically perceived as smoking-related.

Purpose: Few studies have examined whether the incidence rates of invasive breast cancer among Asian American, Native Hawaiian, and Pacific Islander (AANHPI) populations differ by the neighborhood social environment. Thus, we examined associations of ethnic enclave and neighborhood socioeconomic status (nSES) with breast cancer incidence rates among AANHPI females in California.

Methods: A total of 14,738 AANHPI females diagnosed with invasive breast cancer in 2008-2012 were identified from the California Cancer Registry. AANHPI ethnic enclaves (culturally distinct neighborhoods) and nSES were assessed at the census tract level using 2007-2011 American Community Survey data. Breast cancer age-adjusted incidence rates and incidence rate ratios (IRRs) were estimated for AANHPI ethnic enclave, nSES, and their joint effects. Subgroup analyses were conducted by stage of disease.

Results: The incidence rate of breast cancer among AANHPI females living in lowest ethnic enclave neighborhoods (quintile (Q)1) were 1.21 times (95% Confidence Interval (CI) 1.11, 1.32) that of AANHPI females living highest ethnic enclave neighborhoods (Q5). In addition, AANHPI females living in highest vs. lowest SES neighborhoods had higher incidence rates of breast cancer (Q5 vs. Q1 IRR = 1.30, 95% CI 1.22 to 1.40). The incidence rate of breast cancer among AANHPI females living in low ethnic enclave + high SES neighborhoods was 1.32 times (95% CI 1.25, 1.39) that of AANHPI females living in high ethnic enclave + low SES neighborhoods. Similar patterns of associations were observed for localized and advanced stage disease.

Conclusion: For AANHPI females in California, incidence rates of breast cancer differed by nSES, ethnic enclave, when considered independently and jointly. Future studies should examine whether the impact of these neighborhood-level factors on breast cancer incidence rates differ across specific AANHPI ethnic groups and investigate the pathways through which they contribute to breast cancer incidence.

Purpose: Social support has been linked to increased use of preventive care services. Living arrangements and residential stability may be important structural sources of social support, but few studies have examined their impact on cancer screening.

Methods: Data were from the 2021 National Health Interview Survey. Participants were classified as up-to-date or not with female breast cancer (BC), cervical cancer (CVC), and colorectal cancer (CRC) screening recommendations. Multivariable logistic regression was used to model associations between screening and residential stability (< 1 year, 1-3 years, 4-10 years, 11-20 years, or > 20 years), living arrangement (with spouse/partner only, children only, both, or neither), and perceived social support (rarely/never, sometimes, usually, or always available), overall and stratified by sex (CRC) and age group (CVC).

Results: The adjusted odds of BC (odds ratio [OR]  0.61, 95% CI 0.45-0.81) and CVC (OR 0.76, 95% CI 0.60-0.96) screening were lowest for those who reported never/rarely vs. always having social support. The adjusted odds of BC (OR 1.44, 95% CI 1.22-1.70) and CRC (OR_FEMALE = 1.42, 95% CI 1.20-1.68; OR_MALE = 1.61, 95% CI 1.35-1.90) screening were higher for those living with a spouse/partner only vs. those living with neither spouse/partner nor children. Less residential stability was associated with increased CVC screening among females 21-34 years of age, but not BC or CRC screening.

Conclusions: Social support measures were associated with screening to varying degrees by site and age, but higher perceived social support and living with a spouse/partner only demonstrated a consistent positive association. Interventions that mobilize social support networks and address the unmet social needs of parents/caregivers may improve cancer control.

Background: Estrogen may play a role in epithelial ovarian cancer (EOC) carcinogenesis, with effects varying by EOC histotype. Measuring women's long-term exposure to estrogen is difficult, but bone mineral density (BMD) may be a reasonable proxy of longer-term exposure. We examined this relationship by assessing the association between genetic predisposition for higher BMD and risk of EOC by histotype.

Methods: We used Mendelian randomization (MR) to assess associations between genetic markers for femoral neck and lumbar spine BMD and each EOC histotype. We used multivariable MR (MVMR) to adjust for probable pleiotropic traits, including body mass index, height, menarcheal age, menopausal age, smoking, alcohol intake, and vitamin D.

Results: Univariable analyses suggested greater BMD was associated with increased risk of endometrioid EOC (per standard deviation increase; lumbar spine OR = 1.21; 95% CI 0.93,1.57, femoral neck: OR = 1.25; 0.99,1.57), but sensitivity analyses indicated that pleiotropy was likely. Adjustment using MVMR reduced the magnitude of estimates slightly (lumbar spine: OR = 1.13; 95% CI 1.00,1.28, femoral neck: OR = 1.18; 1.03,1.36). Results for lumbar spine BMD and high-grade serous EOC were also suggestive of an association (univariable MR: OR = 1.16; 95% CI 1.03,1.30; MVMR: OR = 1.06; 0.99,1.14).

Conclusion: Our study found associations between genetic predisposition to higher BMD, a proxy for long-term estrogen exposure, and risk of developing endometroid and high-grade serous EOC cancers. These findings add to existing evidence of the relationship between estrogen and increased risk of EOC for certain histotypes.

Purpose: Improving cancer outcomes in Sub-Saharan Africa (SSA) requires effective implementation of evidence-based strategies. This scoping review maps the evidence on lymphoma epidemiology, treatment challenges, and patient pathways in SSA from 2011 to 2022.

Methods: A comprehensive three-step search was conducted without language restrictions.

Results: Eighty-four publications were included, 83% published after 2017. Southern and Eastern Africa led in output. Most studies were chart reviews (47.6%) and cohort studies (25%). NHL accounted for over 80% of cases, with an age-standardized rate (ASR) reaching 10.9/100,000, while HL had an ASR of 0.4-2.3/100,000. Compared to studies in Europe and US, SSA studies reported lower incidence rates, higher HIV comorbidity, and younger median ages. Diagnosis is often delayed, incomplete and lacks sub-classification with HIV and tuberculosis further complicating care. One-year survival rates are around 50% for NHL and over 75% for HL. Treatment is well-tolerated with an acceptable treatment-related mortality rate. However, outcomes are affected by diagnostic delays, late presentations, and treatment abandonment. Non-clinical aspects of care such as financial constraints negatively impact patient pathways.

Conclusion: Addressing diagnostic delays, misdiagnosis, and treatment abandonment is crucial. Strengthening care access, diagnostics, and integrating innovative strategies including a multidisciplinary approach and re-designing efficient clinical diagnostic pathways are vital.

Purpose: Low-dose computed tomography lung cancer screening is effective for reducing lung cancer mortality. It is critical to understand the lung cancer screening practices for screen-eligible individuals living in Alabama and Georgia where lung cancer is the leading cause of cancer death. High lung cancer incidence and mortality rates are attributed to high smoking rates among underserved, low income, and rural populations. Therefore, the purpose of this study is to define sociodemographic and clinical characteristics of patients who were screened for lung cancer at an Academic Medical Center (AMC) in Alabama and a Safety Net Hospital (SNH) in Georgia.

Methods: A retrospective cohort study of screen-eligible patients was constructed using electronic health records between 2015 and 2020 seen at an Academic Medical Center (AMC) and a Safety Net Hospital (SNH) separately. Chi-square tests and Student t tests were used to compare screening uptake across patient demographic and clinical variables. Bivariate and multivariate logistic regressions determined significant predictors of lung cancer screening uptake.

Results: At the AMC, 67,355 were identified as eligible for LCS and 1,129 were screened. In bivariate analyses, there were several differences between those who were screened and those who were not screened. Screening status in the site at Alabama-those with active tobacco use are significantly more likely to be screened than former smokers (OR: 3.208, p < 0.01). For every 10-unit increase in distance, the odds of screening decreased by about 15% (OR: 0.848, p < 0.01). For every 10-year increase in age, the odds of screening decrease by about 30% (OR: 0.704, p < 0.01). Each additional comorbidity increases the odds of screening by about 7.5% (OR: 1.075, p < 0.01). Those with both private and public insurance have much higher odds of screening compared to those with only private insurance (OR: 5.403, p < 0.01). However, those with only public insurance have lower odds of screening compared to those with private insurance (OR: 0.393, p < 0.01). At the SNH-each additional comorbidity increased the odds of screening by about 11.9% (OR: 1.119, p = 0.01). Notably, those with public insurance have significantly higher odds of being screened compared to those with private insurance (OR: 2.566, p < 0.01).

Conclusion: The study provides evidence that LCS has not reached all subgroups and that additional targeted efforts are needed to increase lung cancer screening uptake. Furthermore, disparity was noticed between adults living closer to screening institutions and those who lived farther.

Purpose: Surgery, an established short-term immunosuppressive event, may spur dissemination of circulating tumor cells and promote the growth of micrometastases. Whether surgical treatment for prostate cancer (i.e., radical prostatectomy) leads to long-term immune changes is unknown.

Methods: We characterized intra-individual changes in circulating immune cell subsets across a six-month period using serial blood samples from prostate cancer patients pre- and post-radical prostatectomy (n = 11), and from a comparison group managed with active surveillance (n = 8). Immune cell subsets for each patient at each time point were deconvoluted using genome-wide methylation data.

Results: There were no statistically significant intra-individual changes in immune cell proportions from pre- to six months post-radical prostatectomy. There were also no intra-individual changes in immune cell proportions in the active surveillance group, and no differences between treatment groups in immune cell changes over time.

Conclusion: We observed no meaningful changes in circulating immune cell subsets six months after radical prostatectomy, suggesting that surgery-induced immune changes may not be long-lasting.

Purpose: Randomized clinical trials support reductions in contralateral breast cancer (CBC) risk with use of adjuvant endocrine therapy, however, real-world treatment effects, particularly for subgroups of breast cancer survivors, remain inconclusive. To address this, population-based observational studies of adjuvant endocrine therapy and CBC were synthesized and meta-analyzed.

Methods: PubMed and Embase databases were systematically searched for observational studies of endocrine therapy use and CBC risk. Random effects meta-analyses estimated summary relative risks (RRs) and 95% confidence intervals (CIs) for associations between endocrine therapy (ever use of tamoxifen and/or aromatase inhibitors (AIs)) and CBC risk. Heterogeneity across studies was assessed using the I² test. Subgroup analyses were conducted by study design, menopausal status, and CBC estrogen receptor (ER)-status.

Results: Seventeen eligible observational studies (n = 287,576 breast cancer survivors) published between 1995 and 2019 were included. Endocrine therapy use was associated with reduced CBC risk (RR:0.62, 95% CI:0.53, 0.73, I² = 84.8%, p < 0.0001). No heterogeneity was observed by study design (p_het = 0.9). Similar reductions were observed in analyses restricted to tamoxifen use. As only two studies assessed AI use, estimates could not be meta-analyzed. In subgroup analyses, there were no differences in CBC risk reduction by menopausal status (p_het = 0.22). Endocrine therapy reduced risk of ER-positive (RR:0.55, 95% CI:0.43, 0.70) but not ER-negative CBC (RR:1.26, 95% CI:0.95, 1.66) (p_het < 0.001).

Conclusion: This meta-analysis of observational studies supports a reduction in CBC risk with endocrine therapy among breast cancer survivors, in concert with evidence synthesized from randomized clinical trials, and highlights differences in endocrine therapy effectiveness by ER-status of CBC.

Purpose: Physical activity (PA) can improve cancer survival; however, whether the timing of PA differentially affects mortality risk is unclear. We evaluated the association between PA levels pre- and post-diagnosis and mortality risk in the Women's Health Study (WHS), Physicians' Health Study (PHS)-I, and PHS-II prospective cohorts.

Methods: We categorized PA pre- and post-diagnosis as active (WHS: ≥ 7.5 metabolic equivalent (MET)-h/week; PHS: vigorous PA ≥ 2-4 times/week) or inactive. We analyzed changes in pre- and post-diagnosis PA levels as four joint categories: (1) Inactive → Inactive, (2) Active → Inactive, (3) Inactive → Active, and (4) Active → Active, on mortality risk using multivariable Cox proportional hazards regression.

Results: We identified 10,541 participants with incident cancer and 3,696 deaths during follow-up. Compared to maintaining inactivity in both periods, remaining active pre- and post-diagnosis observed lower all-cause (Hazard Ratio [95% confidence interval]: WHS: 0.55 [0.47-0.64]; PHS-I: 0.77 [0.67-0.88]), cancer (WHS: 0.55 [0.45-0.67]; PHS-I: 0.75; [0.61-0.92]) and non-cancer/cardiovascular disease (CVD) mortality risks (WHS: 0.49 [0.38-0.65]). Similarly, becoming active post-diagnosis was associated with lower all-cause (WHS: 0.60 (0.48-0.75]; PHS-I: 0.72 [0.61-0.88]), cancer (WHS: 0.65 [0.49-0.86]; PHS-I: 0.64 [0.49-0.84]), and non-cancer/CVD mortality risk (WHS: 0.49 [0.33-0.75]). Being active pre- and post-diagnosis was associated with lower mortality risks in separate analyses, although significance differed by cohort and outcome.

Conclusions: Remaining active pre- and post-diagnosis and becoming active post-diagnosis may be associated with improvements in cancer survival, however, research is needed across diverse cancer populations.