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Nevin Manimala Statistics

Assessing treatment effects based on the two-wave latent change score model – an alternative to repeated measures ANOVA

J Behav Med. 2026 Jan 19. doi: 10.1007/s10865-025-00625-3. Online ahead of print.

ABSTRACT

Behavioral science and health psychology researchers often strive to investigate treatment effects using traditional statistical approaches, such as repeated measures ANOVA. However, these methods often fall short in addressing complexities like measurement error, intraindividual variability, and change processes over time. This study introduces the Two-Wave Latent Change Score Model (2W-LCSM; Henk & Castro-Schilo, 2016) as a robust alternative for modeling treatment-induced change and its long-term behavioral consequences. We demonstrate an illustrative example using data from individuals convicted of sexual crimes, incarcerated, and completing psychotherapy programs based on cognitive behavioral therapy. Our findings highlight the utility of 2W-LCSM in capturing both within-person change and its predictive relationship with recidivism. Results indicate a significant reduction in cognitive distortions post-treatment, with latent change scores emerging as a significant predictor of reduced sexual crime recidivism. These findings underscore the value of 2W-LCSM in behavioral medicine research, offering insights for tailoring interventions and advancing statistical methodologies in the field.

PMID:41553614 | DOI:10.1007/s10865-025-00625-3

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Nevin Manimala Statistics

Perioperative blood loss in robotic urologic surgery: a retrospective evaluation of estimation methods

J Robot Surg. 2026 Jan 19;20(1):194. doi: 10.1007/s11701-025-03120-8.

ABSTRACT

Urology has been a leading field in the adoption of robotic surgery, which offers technical advantages and low complication rates, including notably reduced intraoperative blood loss. In this study, we aimed to examine the relationship between formula-based estimated blood loss and visually estimated intraoperative blood loss in robotic urologic procedures. In this retrospective study, 111 robot-assisted urologic surgery were included. The agreement between the visually estimated intraoperative blood loss and the estimated values calculated using different formulas (Hb dilution method formula, Hb mass method, Gross Formula, López-Picado Formula). To determine how consistent each estimation was with the visually estimated intraoperative blood loss and with each other, Bland-Altman analysis, Concordance Correlation Coefficient (CCC) and Intraclass Correlation Coefficient (ICC) were applied. Intraoperative blood loss (visual estimation) indicated a mean blood loss of 220.72 ± 212.61 mL, whereas formula-based calculations consistently yielded higher estimates: López-Picado, 721.64 ± 532 mL; Hb mass method, 667.79 ± 429 mL; Gross formula, 726.97 ± 540 mL; and Hb dilution method, 737.99 ± 545 mL. The analyses revealed that all formulas differed statistically significantly from the visually estimated intraoperative blood loss. Evaluation of agreement and consistency demonstrated that the formulas showed poor agreement both with estimated blood loss and with one another. The strongest concordance was observed between López-Picado and Gross formula. There was a large discrepancy between visually estimated intraoperative blood loss and formula-based estimations. While formula-based methods show strong internal consistency, they differ substantially from the subjective estimates commonly used.

PMID:41553610 | DOI:10.1007/s11701-025-03120-8

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Nevin Manimala Statistics

Bidirectional analysis of clinical and MRI correlations in temporomandibular disorders using regression models

Oral Radiol. 2026 Jan 19. doi: 10.1007/s11282-025-00894-3. Online ahead of print.

ABSTRACT

OBJECTIVES: In the course of a standard diagnostic procedure for temporomandibular joint disorder (TMD), there is often uncertainty regarding the necessity of magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ). This study aims to clarify the relationship between clinical TMD symptoms and MRI findings using logistic regression models, to better define the role of MRI in diagnostics.

METHODS: In this retrospective study, the authors analysed a sample of 80 temporomandibular joints (TMJs). Forty patients with TMD symptoms were selected for the study, all of which had previously undergone examination in accordance with the diagnostic criteria for temporomandibular disorders (DC/TMD), as well as having undergone TMJ MRI. Descriptive statistics and regression analyses were used to explore any correlation between clinical symptoms and MRI findings.

RESULTS: MRI-based explanation of clinical symptoms revealed thirteen significant regression models with the following dependent variables: palpation pain at the lateral TMJ pole, TMJ crepitation, condylar hypermobility, uncorrected mandibular deviation, and palpation pain in the medial and lateral pterygoid muscles, as well as in the masseter and temporalis muscles. In contrast, the clinical symptom-based inference of MRI diagnoses yielded eleven significant models, with MRI findings as dependent variables: effusion, degenerative joint disease, anterior disc displacement without reduction, medial disc displacement, thickening at the insertion of the lateral pterygoid muscle, subluxation of the mandibular condyle, reduced glenoid fossa height, and abnormal disc morphology. Among all models, only anterior disc displacement without reduction with condylar hypermobility and with the pain in the masseter muscle demonstrated acceptable predictive accuracy. (AUC = 0.651, AUC = 0.637).

CONCLUSIONS: This study confirms that clinical examination alone may be insufficient for accurately diagnosing specific TMJ pathologies. Although some clinical signs show strong associations with MRI findings, only two regression models demonstrated acceptable predictive value.

PMID:41553600 | DOI:10.1007/s11282-025-00894-3

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Nevin Manimala Statistics

Risk of Cancer Comparing Warfarin and Direct Oral Anticoagulants: Population-Based Cohort Studies in England and Hong Kong

Drug Saf. 2026 Jan 19. doi: 10.1007/s40264-025-01645-3. Online ahead of print.

ABSTRACT

BACKGROUND: Previous evidence suggests a potential protective effect of warfarin against cancer, compared to non-users. However, it may be prone to immortal time bias and residual confounding.

OBJECTIVE: We aimed to examine the association between cancer and warfarin, compared with active comparator (direct oral anticoagulants).

METHODS: We conducted studies using population-based databases from England and Hong Kong to investigate the association between warfarin and hazard of cancer using a new-user active-comparator cohort design. People with atrial fibrillation aged ≥ 18 years who had first received anticoagulant treatment during 01/01/2011-31/12/2019 were involved.

RESULTS: No evidence supported the association between warfarin and hazard of overall cancer, compared with direct oral anticoagulants in both settings (England: hazard ratio [HR] = 1.03, 95% confidence interval [CI] 0.94-1.13; Hong Kong: HR = 0.89, 95% CI 0.79-1.01). A lower hazard of female breast (HR = 0.49, 95% CI 0.30-0.79), ovarian (HR = 0.07, 95% CI 0.01-0.58), and pancreatic (HR = 0.46, 95% CI 0.22-0.96) cancers and a higher hazard of kidney cancer (HR = 3.57, 95% CI 1.64-7.76) were found in Hong Kong, comparing warfarin with direct oral anticoagulants, but these were not replicated in England.

CONCLUSIONS: This study does not find a protective effect of warfarin against cancer versus direct oral anticoagulants. The risks of site-specific cancers including pancreatic, kidney, and sex-specific cancers between oral anticoagulants shown in the Hong Kong setting only may require further investigation in other independent datasets.

PMID:41553598 | DOI:10.1007/s40264-025-01645-3

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Nevin Manimala Statistics

Characterizing the tuberculosis and type 2 diabetes mellitus comorbidity in a South African cohort using untargeted GCxGC-TOFMS metabolomics

Metabolomics. 2026 Jan 19;22(1):19. doi: 10.1007/s11306-025-02389-y.

ABSTRACT

INTRODUCTION: Tuberculosis (TB) and type 2 diabetes mellitus (T2DM) are highly prevalent diseases resulting in high mortality rates globally. Furthermore, T2DM increases susceptibility to TB and vice versa, worsening disease outcomes. This comorbidity is, however, not well described nor understood, despite its rising prevalence globally.

OBJECTIVES: This investigation aimed to better characterize the urinary metabolic profiles of patients with the TB and T2DM comorbidity in a South African cohort, to better understand its metabolic basis and associated clinical implications.

METHODS: Using untargeted GCxGC-TOFMS metabolomics, urine samples from 17 patients with TB and T2DM and 34 healthy controls were analyzed and statistically compared to identify significantly altered urinary metabolites.

RESULTS: TB-T2DM comorbid patients were characterized by altered metabolism of: (1) tryptophan and kynurenine (reduced kynurenic acid, anthranilic acid, picolinic acid) associated with changes to NAD+ synthesis and a redox imbalance, (2) nucleotides (reduced 3-aminoisobutyric acid, orotic acid, thymine, β-alanine, adenine, hypoxanthine), (3) tyrosine (reduced 3,4-dihydroxyphenylglycol, 4-hydroxy-3-methoxyphenylglycol, hydroxyphenylpyruvate), (4) lipids (reduced dec-2-enedioate, adipic acid, methylmalonic acid), (5) reduced concentrations of various glycine conjugates associated with glycine depletion, and (6) reduced urinary concentrations of various gut microbial metabolites indicative of microbial dysbiosis.

CONCLUSION: These results indicate several metabolic disruptions to amino acids, nucleotides, lipids, NAD⁺ homeostasis and the host microbiome, in TB-T2DM patients, mainly driven by inflammation and oxidative stress. Overall, the findings indicate synergistic amplification of metabolic stress, associated with immune suppression and TB-T2DM disease progression, and subsequently suggests how TB increases T2DM susceptibility and vice versa, as foundation for further investigations.

PMID:41553570 | DOI:10.1007/s11306-025-02389-y

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Nevin Manimala Statistics

Myeloid sarcomas: Experience from a pediatric oncology referral center

Cir Pediatr. 2026 Jan 15;39(1):32-36. doi: 10.54847/cp.2026.01.15.

ABSTRACT

OBJECTIVE: To analyze the experience in the management of myeloid sarcomas at a pediatric oncology referral center.

MATERIAL AND METHODS: A descriptive, retrospective study of patients under 18 years of age diagnosed with myeloid sarcoma between 2010 and 2024. Demographic variables, underlying disease, tumor location, tumor size, treatment, and clinical outcome were collected. The analysis was performed using IBM® SPSS Statistics 30.0.

RESULTS: Seventeen myeloid sarcomas were identified in 14 patients, 13 (76.5%) of whom were male. The median age at diagnosis was 4.33 years (range: 1 month-14.5 years). In 10 cases (58.8%), the sarcoma was the first manifestation of an underlying hematologic malignancy. Biopsy was performed in 12 cases (70.6%). The most frequent locations were soft tissues (47.1%) and bone (23.5%). The mean tumor volume was 45.2 cm3. Acute myeloid leukemia was the most common underlying neoplasm (n= 14), followed by B-cell acute lymphoblastic leukemia (n= 3). Eight myeloid sarcomas (47.1%) resolved after a first cycle of chemotherapy, 6 (35.3%) required additional cycles, 2 (11.8%) received local treatment, and in 1 case (5.9%) resolution was not achieved.

CONCLUSIONS: Myeloid sarcoma represents an uncommon extramedullary manifestation. Early diagnosis, based on a high index of suspicion and appropriate clinical and radiological characterization, is crucial to establish an effective therapeutic approach and improve prognosis.

PMID:41550052 | DOI:10.54847/cp.2026.01.15

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Nevin Manimala Statistics

Conservative management of pediatric patients with solid organ injury after blunt abdominal trauma. Consensus sponsored by the Spanish Society of Pediatric Surgery

Cir Pediatr. 2026 Jan 15;39(1):22-31. doi: 10.54847/cp.2026.01.14.

ABSTRACT

INTRODUCTION: The treatment of choice in pediatrics for solid organ injuries resulting from blunt abdominal trauma is conservative management. However, in Spain, said management has proven to be heterogeneous and inconsistent with recent evidence. The Spanish Society of Pediatric Surgery (SECP) sponsored the development of this consensus document in the year 2024.

MATERIAL AND METHODS: After recruiting a group of experts, a bibliographic review was conducted using the systematic reviews from APSA, the ATOMAC group, and contributions from the experts themselves, to draft a series of initial suggestions. The experts, using the Delphi method, scored these (Likert scale) in different voting rounds until statistical stability in the responses was determined (Wilcoxon Test). Consensus was defined as agreement (scores 4-5) exceeding 70%.

RESULTS: Twelve experts from 11 centers were recruited, achieving gender parity. Seventeen suggestions were developed, organized into four key areas: PICU admission, discharge criteria and strict bed rest, analytical/radiological controls, and physical activity restriction. Statistical stability was reached after 2 scoring rounds, achieving consensus on 15 of the 17 suggestions, while it was not achieved regarding hospital discharge criteria and duration of strict bed rest.

CONCLUSIONS: Through Delphi methodology, a consensus document on the conservative management of solid organ injuries was developed. Although consensus was not reached on key aspects such as discharge criteria and strict bed rest, this document aims to help homogenize clinical practice.

PMID:41550051 | DOI:10.54847/cp.2026.01.14

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Nevin Manimala Statistics

Surgical decision-making strategies in preterm neonates with necrotizing enterocolitis: A randomized controlled clinical trial

Cir Pediatr. 2026 Jan 15;39(1):15-21. doi: 10.54847/cp.2026.01.13.

ABSTRACT

INTRODUCTION: Surgical necrotizing enterocolitis (NEC) is associated with high mortality. Bell’s criteria may indicate surgery in late stages, leading to worse outcomes. Early identification of surgical candidates is necessary. Objective: To evaluate surgical decision-making strategies in neonates with NEC, comparing Bell’s criteria versus the combined use of metabolic disorder components (MD7) and paracentesis.

MATERIAL AND METHODS: A randomized controlled clinical trial was conducted in perinatal hospitals (2022-2023), ClinicalTrials.gov identifier: NCT06035848. Preterm neonates with NEC were divided into a control group (CG): surgery determined by Bell’s criteria, and an intervention group (IG): surgery indicated by MD7 and positive paracentesis. The primary outcome was mortality. Descriptive and inferential statistics, relative risk (RR), with 95% confidence interval (CI), and a p-value < 0.05 indicating statistical significance were used.

RESULTS: 117 patients participated (CG n = 56, IG n = 61). In surgical NEC, mortality was 32.1% in IG and 64.7% in CG (p = 0.034; RR = 2, 95% CI: 1.1-4.8). In the IG, surgery was performed early, with better outcomes for perforation, intestinal necrosis, and reoperation (p < 0.05). There were no complications derived from paracentesis, and there were 3 non-therapeutic laparotomies in the IG.

CONCLUSIONS: The strategy based on MD7 and paracentesis was superior to Bell’s criteria for guiding surgical decisions in preterm neonates with NEC, reducing mortality. The main limitation was a small number of non-therapeutic laparotomies, expected due to the greater sensitivity of the strategy.

PMID:41550050 | DOI:10.54847/cp.2026.01.13

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Nevin Manimala Statistics

Implementation of a safety protocol for removal of bars in the pectus excavatum

Cir Pediatr. 2026 Jan 15;39(1):4-8. doi: 10.54847/cp.2026.01.11.

ABSTRACT

INTRODUCTION: Extraction of bars during Minimally Invasive Repair for Pectus Excavatum (MIRPE) is susceptible to complications ranging from mild to severe. Objective: to compare the outcomes following the implementation of a Bar Extraction Safety Protocol (BESP) to determine its effectiveness in reducing complications.

MATERIAL AND METHODS: Retrospective comparative cohort study. Inclusion criteria: Patients who underwent bar removal from November 2013 to March 2024, in whom BESP was implemented, compared with a historical cohort operated on previously. Protocol includes: a) Preoperative measures: during implantation, use of smooth bars, a minimum of two bars with lateral stabilizers, sternal elevation; pre-removal: chest X-rays. b) Intraoperative measures: bilateral incisions, bar straightening, and “safety string” maneuver. c) Postoperative measures: 24-hour admission to the pediatric intensive care unit (PICU) and post-removal chest X-ray. Complications were classified using the Clavien-Dindo (C-D) system, focusing on clinically relevant ones (C-D ≥ II). Statistical analysis was performed using the chi-squared test (Stata v16).

RESULTS: Sixty-seven patients were included; 62 were male. Mean age at surgery: 17 years (range 14-24). Thirty patients (43 bars) operated on pre-BESP, 37 (81 bars) post-BESP. Pre-BESP bars were serrated; post-BESP bars were smooth. Bar dwell time was 27 months (IQR 23-33) pre-BESP and 24 months (IQR 23-25) post-BESP. Hospital stay was 1 day in both groups (maximum: 16 vs. 4 days). Clinically relevant complications occurred in 20% of pre-BESP patients and 0% post-BESP (p=0.048).

CONCLUSIONS: Implementation of BESP significantly reduced complications after bar removal, improving safety during bar removal in the MIRPE.

PMID:41550048 | DOI:10.54847/cp.2026.01.11

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Nevin Manimala Statistics

Transformer-Based Multi-Channel K-Complex Detection Algorithm Tailored for Elderly Patients With Amnestic Mild Cognitive Impairment

J Sleep Res. 2026 Jan 19:e70285. doi: 10.1111/jsr.70285. Online ahead of print.

ABSTRACT

K-complexes (KCs) are hallmark waveforms of non-rapid eye movement stage 2 (NREM2) sleep, associated with sleep maintenance and memory consolidation. KC density and amplitude decline with ageing and are further altered in amnestic mild cognitive impairment (aMCI). Manual scoring, while considered the gold standard, is labour intensive and subjective. Existing automated KC detectors, often trained on small public datasets of young healthy subjects using single-channel electroencephalography (EEG), may underperform in elderly aMCI individuals whose KC morphology is more variable. Hence, the goal of this study is to develop and validate AdaPatchFormer, an automated multi-channel Transformer-based KC detection algorithm optimised for elderly individuals with aMCI. AdaPatchFormer integrates a period embedding module, which adaptively identifies physiologically relevant rhythms across multiple frequency bands, with a multi-granularity encoder that progressively fuses temporal features across channels. The model was trained on full-night polysomnography (PSG) recordings from 268 elderly aMCI patients and evaluated against expert-labelled gold standards on four independent test datasets: private aMCI and cognitively normal cohorts, plus two public elderly cohorts. Across all datasets, AdaPatchFormer outperformed the two open-access detectors by Chambon et al. and Lechat et al., achieving higher recall, precision, specificity, accuracy, F1 score, Matthews correlation coefficient (MCC) and a well-balanced recall-precision profile. Moreover, the KC density and amplitude detected by AdaPatchFormer closely mirrored expert annotations. These results suggest that AdaPatchFormer is a robust, accurate, and objective algorithm for KC detection in elderly individuals, with the potential for supporting early and cost-effective identification of aMCI in real-world settings.

PMID:41550042 | DOI:10.1111/jsr.70285