Category: Statistics

JAMA Netw Open. 2023 Dec 1;6(12):e2349026. doi: 10.1001/jamanetworkopen.2023.49026.

ABSTRACT

IMPORTANCE: Many multimodality treatment regimens exist for gastric adenocarcinoma, including neoadjuvant vs adjuvant chemotherapy, radiation, or both. Neoadjuvant therapy is recommended in the United States for patients with locally advanced gastric cancer; however, it is unknown whether the outcomes of neoadjuvant therapy are associated with race and ethnicity.

OBJECTIVE: To evaluate the differences in outcomes by race and ethnicity of patients with noncardia gastric cancer undergoing surgical procedures with and without neoadjuvant therapy.

DESIGN, SETTING, AND PARTICIPANTS: This retrospective cohort study examined the National Cancer Database from the American College of Surgeons for patients with clinical stage II or III gastric adenocarcinoma, excluding gastric cardia tumors, undergoing surgical resection procedures from January 2006 to December 2019. Statistical analysis was performed from December 2021 to May 2023.

EXPOSURE: Patients were stratified by race and ethnicity, and their outcomes were analyzed for those who received and did not receive neoadjuvant therapy.

MAIN OUTCOMES AND MEASURES: The Cox proportional hazard model was used to compare overall survival (OS) between racial and ethnic groups (Asian, Black, Hispanic, and White) overall and according to receipt of neoadjuvant therapy. Among those who received neoadjuvant therapy, proportional differences in pathological responses were calculated in each group.

RESULTS: Among a total of 6938 patients in the cohort, 4266 (61.4%) were male; mean (SD) age was 65.9 (12.8) years; 1046 (15.8%) were Asian, 1606 (24.3%) were Black, 1175 (17.8%) were Hispanic, and 3540 (53.6%) were White. Compared with other races and ethnicities, the group of White patients had significantly more who were 65 years or older with more comorbidities. White patients underwent surgical resection procedures alone without neoadjuvant or adjuvant therapy more frequently than other races and ethnicities. Asian and Black patients had the highest proportion of being downstaged or achieving pathological complete response after neoadjuvant therapy. In multivariate models, perioperative chemotherapy was associated with improved OS (HR, 0.79 [95% CI, 0.69-0.90]), whereas number of positive lymph nodes and surgical margins were associated with the largest decreases in OS. Asian and Hispanic race and ethnicity were associated with significantly improved OS compared with Black and White races (eg, Asian patients: HR, 0.64 [95% CI, 0.58-0.72]; and Hispanic patients: HR, 0.77 [95% CI, 0.69-0.85]). Black race was associated with improved OS compared with White race when receiving neoadjuvant therapy (HR, 0.78 [95% CI, 0.67-0.90]).

CONCLUSIONS AND RELEVANCE: In this large nationwide cohort study of survival outcomes among patients with resected clinical stage II or III gastric cancer, there were significant differences in response to treatment and OS between different racial and ethnic groups.

PMID:38127346 | DOI:10.1001/jamanetworkopen.2023.49026

JAMA Netw Open. 2023 Dec 1;6(12):e2349098. doi: 10.1001/jamanetworkopen.2023.49098.

ABSTRACT

IMPORTANCE: Despite the availability of several empirically supported trauma-focused interventions, retention in posttraumatic stress disorder (PTSD) psychotherapy is poor. Preliminary efficacy data shows that brief, family-based interventions may improve treatment retention in a veteran’s individual PTSD treatment, although whether this occurs in routine clinical practice is not established.

OBJECTIVE: To characterize receipt of family therapy among veterans diagnosed with PTSD and evaluate whether participation in family therapy is associated with an increased likelihood of completing individual trauma-focused treatment.

DESIGN, SETTING, AND PARTICIPANTS: This retrospective cohort study used the Veterans Health Administration (VHA) Informatics and Computing Infrastructure to extract electronic health record data of participants. All participants were US veterans diagnosed with PTSD between October 1, 2015, and December 31, 2019, who attended at least 1 individual trauma-focused treatment session. Statistical analysis was performed from May to August 2023.

EXPOSURES: Receipt of any family psychotherapy and subtype of family-based psychotherapy.

MAIN OUTCOMES AND MEASURES: Minimally adequate individual trauma-focused treatment completion (ie, 8 or more sessions of trauma-focused treatment in a 6-month period).

RESULTS: Among a total of 1 516 887 US veterans with VHA patient data included in the study, 58 653 (3.9%) received any family therapy; 334 645 (23.5%) were Black, 1 006 168 (70.5%) were White, and 86 176 (6.0%) were other race; 1 322 592 (87.2%) were male; 1 201 902 (79.9%) lived in urban areas; and the mean (SD) age at first individual psychotherapy appointment was 52.7 (15.9) years. Among the 58 653 veterans (3.9%) who received any family therapy, 36 913 (62.9%) received undefined family therapy only, 15 528 (26.5%) received trauma-informed cognitive-behavioral conjoint therapy (CBCT) only, 5210 (8.9%) received integrative behavioral couples therapy (IBCT) only, and 282 (0.5%) received behavioral family therapy (BFT) only. Compared with receiving no family therapy, the odds of completing individual PTSD treatment were 7% higher for veterans who also received CBCT (OR, 1.07 [95% CI, 1.01-1.13]) and 68% higher for veterans received undefined family therapy (OR, 1.68 [95% CI, 1.63-1.74]). However, compared with receiving no family therapy care, veterans had 26% lower odds of completing individual PTSD treatment if they were also receiving IBCT (OR, 0.74 [95% CI, 0.66-0.82]).

CONCLUSIONS AND RELEVANCE: In this cohort study of US veterans, family-based psychotherapies were found to differ substantially in their associations with individual PTSD psychotherapy retention. These findings highlight potential benefits of concurrently providing family-based therapy with individual PTSD treatment but also the need for careful clinical attention to the balance between family-based therapies and individual PTSD treatment.

PMID:38127345 | DOI:10.1001/jamanetworkopen.2023.49098

JAMA Otolaryngol Head Neck Surg. 2023 Dec 21. doi: 10.1001/jamaoto.2023.4024. Online ahead of print.

ABSTRACT

IMPORTANCE: Despite the widespread use of fibula free flap (FFF) surgery for head and neck reconstruction, there are no studies assessing if early weight-bearing (EWB) affects postoperative recovery, and the timing of weight-bearing initiation following FFF surgery varies considerably across institutions. Therefore, it is important to understand the effect of EWB in these patients and whether it could improve postoperative recovery.

OBJECTIVE: To assess the association of EWB after FFF surgery with donor-site complications, length of stay, and discharge to home status.

DESIGN, SETTING, AND PARTICIPANTS: This retrospective cohort study took place at Massachusetts Eye and Ear, a single tertiary care institution in Boston, Massachusetts. A total of 152 patients who received head and neck reconstruction with a fibula osteocutaneous free flap between January 11, 2010, and August 11, 2022, were included.

EXPOSURE: EWB on postoperative day 1 vs non-EWB on postoperative day 2 or later.

MAIN OUTCOMES AND MEASURES: Patient characteristics, including demographic characteristics and comorbidities, surgical characteristics, donor-site complications, length of stay, and discharge disposition, were recorded. Descriptive statistics and multivariate logistic regressions were used to compute effect sizes and 95% CIs to compare postoperative outcomes in EWB and non-EWB groups.

RESULTS: A total of 152 patients (median [IQR] age, 63 [55-70] years; 89 [58.6%] male) were included. The median (IQR) time to postoperative weight-bearing was 3 (1-5) days. Among all patients, 14 (9.2%) had donor-site complications. EWB on postoperative day 1 was associated with shorter length of stay (adjusted odds ratio [AOR], 0.10; 95% CI, 0.02-0.60), increased rate of discharge to home (AOR, 7.43; 95% CI, 2.23-24.80), and decreased donor-site complications (AOR, 0.11; 95% CI, 0.01-0.94). Conversely, weight-bearing 3 or more days postoperatively was associated with an increased risk of pneumonia (AOR, 6.82; 95% CI, 1.33-34.99).

CONCLUSIONS AND RELEVANCE: In this cohort study, EWB after FFF surgery was associated with shorter length of stay, increased rate of discharge to home, and decreased donor-site complications. These findings support the role of early mobilization to optimize postoperative recovery after FFF surgery.

PMID:38127340 | DOI:10.1001/jamaoto.2023.4024

Ital J Dermatol Venerol. 2023 Dec 21. doi: 10.23736/S2784-8671.23.07630-2. Online ahead of print.

ABSTRACT

BACKGROUND: Accumulating evidence suggests that oxidative stress is involved in the inflammatory process of atopic dermatitis (AD). Biopyrrins are the end products of the oxidative reaction of bilirubin with reactive oxygen species. The aim of our study was to explore the correlation between urinary biopyrrin levels and AD severity as well as to assess the possible modification of them in AD patients during biologic therapy with human monoclonal antibody dupilumab.

METHODS: For this purpose, 25 adult patients with moderate-severe AD who were candidates for dupilumab therapy independently from the study, and 15 healthy control subjects, matched by sex and age, were enrolled. Morning urine samples were collected from all study participants. For AD patients, a collection was planned before starting therapy with dupilumab (WO), after 8, 16, 52 weeks (W8, W16, W52, respectively), and two years (Y2) of treatment. The analysis of urinary levels of biopyrrins was performed by ELISA assay.

RESULTS: Our results demonstrated that urinary biopyrrin levels were significantly augmented in AD patients, and interestingly they correlated with disease severity. Furthermore, dupilumab therapy decreased levels of urinary biopyrrins in AD patients after eight and 16 weeks, maintaining the result after 52 weeks as well as after two years of treatment. The correlation analysis showed a statistically significant positive correlation between the urinary concentration of biopyrrins and EASI Index, circulating total IgE as well as plasma C reactive protein levels.

CONCLUSIONS: Dupilumab therapy was able to ameliorate oxidative state in AD patients.

PMID:38127318 | DOI:10.23736/S2784-8671.23.07630-2

J Neurosurg Sci. 2023 Dec 21. doi: 10.23736/S0390-5616.23.06019-8. Online ahead of print.

ABSTRACT

BACKGROUND: Treatment-related changes still represent a diagnostic challenge in the management of patients with suspect of recurrent glioblastoma. The specificity of conventional MRI in detecting recurrence remains limited. Brain PET imaging provides information on tumor metabolism and can contribute to improving the diagnostic accuracy of cerebral neoplasms. We performed a retrospective analysis to evaluate the clinical value of O-(2-¹⁸F-fluoroethyl)-L-tyrosine (¹⁸F-FET) PET in the diagnosis of glioblastoma recurrence.

METHODS: A retrospective analysis on patients considered suitable for salvage surgery for recurrence glioblastoma was performed. ¹⁸F-FET-PET was performed to investigate gadolinium enhancement suspected for recurrence. Static and kinetic ¹⁸F-FET parameters were analyzed and related to O-6-methylguanine-DNA methyltransferase (MGMT) status.

RESULTS: Forty-two of the 51 patients who underwent ¹⁸F-FET-PET were re-operated. In each case, neuropathological diagnosis of tumor recurrence was confirmed. pMGMT hypermethylation was detected in 21 patients. Mean tumor-to-brain ratios (TBR) max was 3.87 (range 2.6-6.0). Static and kinetic ¹⁸F-FET parameters were similar according to MGMT status.

CONCLUSIONS: ¹⁸FET-PET can be a reliable tool to improve the selection of patients suitable for salvage surgery for glioblastoma recurrence.

PMID:38127301 | DOI:10.23736/S0390-5616.23.06019-8

J Community Health. 2023 Dec 21. doi: 10.1007/s10900-023-01300-x. Online ahead of print.

ABSTRACT

There is a dearth of population-based studies regarding firearm-related deaths and years of potential life lost among American Indians and Alaska Natives (AI/AN). Using the Centers for Disease Control and Prevention’s (CDC) We Based Injury Statistics Query and Reporting System (WISQARS) data for the three most recent years (2018-2020), we analyzed the demographic characteristics of AI/ANs who succumbed to firearm violence. AI/ANs averaged almost 500 firearm-related deaths per year. The majority of these deaths were observed among individuals 20-39 years of age (53%), males (84.4%), and in the West (55.3%). A plurality of these firearm-related deaths were suicides (48.9%) followed by homicides (43.5%). During the 3-year study period, the age-adjusted firearm death rate increased almost 5 times the growth of the AI/AN population. Also, a staggering 67,050 years of potential life were lost before the age of 80 years (YPLL80) during this period. Firearm suicides were responsible for the largest proportion of YPLL80s (48.5%). Traditional legal interventions [e.g., child access prevention (CAP) laws and extreme risk protection orders (ERPO)], if expanded to more states could potentially help reduce AI/AN firearm mortality. None of the 10 states with the highest firearm mortality of AI/AN have ERPOs and 8 of the 10 do not have CAP laws. Also, a renewed focus on cultural continuity and indigenous protective factors is essential to ameliorate the level of firearm violence in AI/ANs.

PMID:38127297 | DOI:10.1007/s10900-023-01300-x

Chaos. 2023 Dec 1;33(12):123126. doi: 10.1063/5.0168050.

ABSTRACT

Over the past few decades, the research community has been interested in the study of multi-agent systems and their emerging collective dynamics. These systems are all around us in nature, such as bacterial colonies, fish schools, and bird flocks, as well as in technology, such as microswimmers and robotics, to name a few. Flocking and swarming are two key components of the collective behaviors of multi-agent systems. In flocking, the agents coordinate their direction of motion, but in swarming, they congregate in space to organize their spatial position. We propose a minimal mathematical model of a locally interacting multi-agent system where the agents simultaneously swarm in space and exhibit flocking behavior. Various cluster structures are found depending on the interaction range. When the coupling strength value exceeds a crucial threshold, flocking behavior is observed. We do in-depth simulations and report the findings by changing the other parameters and with the incorporation of noise.

PMID:38127290 | DOI:10.1063/5.0168050

Clin Oral Investig. 2023 Dec 21;28(1):10. doi: 10.1007/s00784-023-05418-z.

ABSTRACT

OBJECTIVES: The study aimed to evaluate the potential for the dissolution of organic tissue in areas of simulated complexity and cleaning of root canal walls of the new iVac® endodontic irrigation system.

MATERIAL AND METHODS: Thirty mandibular premolars were evaluated by scanning electron microscopy before and after biomechanical preparation. Then, they were distributed according to the final irrigation protocol into groups with conventional irrigation, ultrasonic agitation with metallic insert (UA), and iVac® system, and new photomicrographs were obtained. For tissue dissolution analysis, glass capillaries filled with catgut were attached to the cervical and apical thirds of twenty-one prototyped upper incisors. They were weighed before and after the previously mentioned irrigation protocols. The data were statistically compared with a significance level of 5%.

RESULTS: The final irrigation provided greater cleaning of the root canal walls in the cervical, middle, and apical thirds of the root canals (P < 0.05), with no statistically significant difference between UA and iVac®, regardless of the analyzed thirds. Both ultrasonic irrigation protocols dissolved a significantly greater volume than the conventional irrigation protocol (P < 0.05), with no difference between the two protocols (P < 0.05).

CONCLUSIONS: The iVac® system showed root canal wall cleaning and tissue dissolution similar to UA with a metallic insert, and both were superior to conventional irrigation.

CLINICAL RELEVANCE: The new irrigation system iVac is more effective than conventional irrigation and has similar root canal wall cleaning and tissue dissolution to UA.

PMID:38127289 | DOI:10.1007/s00784-023-05418-z

Abdom Radiol (NY). 2023 Dec 21. doi: 10.1007/s00261-023-04129-z. Online ahead of print.

ABSTRACT

PURPOSE: The purpose of this study is to determine computed tomography (CT) findings that aid in differentiating idiopathic myointimal hyperplasia of mesenteric veins (IMHMV) from other colitides.

METHODS: Retrospective review of histiologic proven cases of IMHMV (n = 12) with contrast enhanced CT (n = 11) and/or computed tomography angiography (CTA) (n = 9) exams. Control groups comprised of CT of infectious colitis (n = 13), CT of inflammatory bowel disease (IBD) (n = 12), and CTA of other colitides (n = 13). CT exams reviewed by 2 blinded gastrointestinal radiologists for maximum bowel wall thickness, enhancement pattern, decreased bowel wall enhancement, submucosal attenuation value, presence and location of IMV occlusion, peripheral mesenteric venous occlusion, dilated pericolonic veins, subjective IMA dilation, maximum IMA diameter, maximum peripheral IMA branch diameter, ascites, and mesenteric edema. Presence of early filling veins was an additional finding evaluated on CTA exams.

RESULTS: Statistically significant CT findings of IMHMV compared to control groups included greater maximum bowel wall thickness, decreased bowel enhancement, IMV occlusion, and peripheral mesenteric venous occlusion (p < 0.05). Dilated pericolonic veins were seen more frequently in IMHMV compared to the infectious colitis group (64% versus 15%, p = 0.02). Additional statistically significant finding on CTA included early filling veins in IMHMV compared to the CTA control group (100% versus 46%, p = 0.008).

CONCLUSION: IMHMV is a rare chronic non-thrombotic ischemia predominantly involving the rectosigmoid colon. CT features that may aid in differentiating IMHMV from other causes of left-sided colitis include marked bowel wall thickening with decreased enhancement, IMV and peripheral mesenteric venous occlusion or tapering, and early filling of dilated veins on CTA.

PMID:38127281 | DOI:10.1007/s00261-023-04129-z

Oncologist. 2023 Dec 21:oyad319. doi: 10.1093/oncolo/oyad319. Online ahead of print.

ABSTRACT

INTRODUCTION: In advanced basal cell carcinoma (BCC), the issue of whether Hedgehog inhibitors (HHIs) should be stopped or not after clinical complete response (cCR) achievement remains an unmet clinical need.

MATERIALS AND METHODS: We conducted a retrospective, multicenter study across 7 Italian dermato-oncology units including patients with BCC who continued vismodegib after cCR between 2012 and 2019. We assessed the relationship between the duration of vismodegib intake (days to cCR [DTCR], days to stop after cCR [DTS], total treatment days [TTD]), and disease-free survival (DFS). Reasons to stop vismodegib were (R1) toxicity and (R2) disease recurrence. The relationship between DTCR, DTS, TTD, and DFS in the whole population and in R1 subgroup was assessed by Pearson’s correlation coefficient (P < .05) and Bayesian statistics (BF10).

RESULTS: Sixty-eight BCC patients with a median (m) age of 75.5 years (39-100) were included. Most patients were male (N = 43, 63%), without Gorlin syndrome (N = 56, 82%) and with head and neck area as primary site (N = 51, 75%). After cCR, out of 68 patients, 90% (N = 61/68) discontinued vismodegib: 82% (N = 50/61) due to toxicity (R1), and 18% (N = 11/61) due to recurrence (R2). Conversely, 10% (N = 7/68) continued vismodegib until last follow-up. In the whole population (N = 68), cCR was achieved with a mDTCR of 180.50 days. DFS showed a significant correlation with DTS (P < .01, BF10 = 39.2) and TTD (P < .01, BF10 = 35566), while it was not correlated to DTCR (BF10 < 0.1). The analysis of R1 subgroup (N = 50) confirmed these results. DFS correlated with DTS in all recurrent patients (N = 38, r = 0.44, P < .01) and in the recurrent patients who stopped vismodegib for toxicity (N = 26, r = 0.665, P < .01). DFS was longer when vismodegib was maintained for >2 months after cCR (mDFS > 2 months, N = 54 vs. ≤ 2 months, N = 14: 470 vs. 175 d, P < .01).

CONCLUSIONS: Our retrospective results suggest that HHIs should be continued after cCR to improve DFS in BCC.

PMID:38127280 | DOI:10.1093/oncolo/oyad319