1.Impact of cage type on subsidence following anterior cervical discectomy and fusion: a retrospective study
Pierce J. FERRITER JR ; Suhas K. ETIGUNTA ; Akiro H. DUEY ; Christopher GONZALEZ ; Katrina NIETSCH ; Ashley M. ROSENBERG ; Bashar ZAIDAT ; Avanish YENDLURI ; Daniel BERMAN ; Junho SONG ; Jun S. KIM ; Samuel K. CHO
Asian Spine Journal 2026;20(1):87-96
Methods:
Retrospective study of 120 patients (223 fusion levels) who underwent ACDF between 2016 and 2021. Spacer types included structural allografts, PEEK, titanium, and ceramic cages. Radiographic measurements of subsidence were obtained from immediate (≤8 weeks) and long-term (≥6 months) postoperative lateral cervical radiographs. Multivariable linear regression was used to assess the association between spacer type and subsidence, adjusting for patient demographics, surgical levels, smoking history, and osteopenia.
Results:
The mean age of patients was 53.6±10.9 years and 41.7% were male; 47.5% had a smoking history and 20.8% had osteopenia. There were 38 one-level (31.7%), 61 two-level (50.8%), and 21 three-level fusions (17.5%). Spacer distribution included 62 structural allografts (51.7%), 27 PEEK (22.5%), 20 titanium (16.7%), and 11 ceramic (9.2%) cages. On multivariable analysis, PEEK cages were associated with significantly less anterior subsidence (β=−0.972, p <0.001) and posterior subsidence (β=−0.666, p=0.001) compared to allografts, and greater preservation of segmental lordosis (β=1.393, p=0.024). No significant differences in subsidence were found between titanium, ceramic, and allograft spacers.
Conclusions
PEEK cages showed reduced subsidence and better preservation of cervical lordosis compared to structural allografts, while titanium and ceramic cages did not differ significantly from structural allografts. These results suggest that PEEK cages may help minimize subsidence-related complications and improve outcomes.
2.Clinical Application of Pharmacogenomics in Stroke Management: Current Evidence and Future Directions
Keon-Joo LEE ; Minkyung KANG ; Eung Joon LEE ; Jaeseong OH ; Na-Young HAN ; Jeong-Yoon LEE ; Joo-Yeon LEE ; Soo Ji LEE ; Stéphanie DEBETTE ; Guillaume PARÉ ; Daniel WOO ; Andrew ELDEIRY ; Young Seo KIM ; Jinkwon KIM ; Jong-Moo PARK ; Juneyoung LEE ; Joohon SUNG ; Jay Chol CHOI ; Hee-Joon BAE
Journal of Stroke 2026;28(1):58-75
Pharmacogenomic variations may significantly influence responses to commonly prescribed stroke medications. Despite accumulating evidence, genetic testing has not yet been widely integrated into stroke care. This review summarizes current evidence and provides practical guidance for clinical implementation. Pharmacogenomic studies and clinical guidelines related to antiplatelet agents, anticoagulants, and statins were reviewed, with particular emphasis on East Asian populations. Substantial evidence supports genotype-guided use of clopidogrel (CYP2C19), warfarin (CYP2C9, VKORC1, CYP4F2), and statins (SLCO1B1, ABCG2). For aspirin, PTGS1/2 and PEAR1 variants have been investigated; however, current data remain insufficient for clinical application. Regarding direct oral anticoagulants (DOACs), candidate genes such as ABCB1 and CES1 demonstrate pharmacokinetic associations, though robust clinical outcome data are lacking. Distinct allele frequencies in East Asians—such as higher prevalence of CYP2C19 and ABCG2 variants—underscore the need for population-specific strategies. Beyond single-gene approaches, polygenic risk scores, pharmacogenomic panels, and integration with multi-omics data and artificial intelligence represent promising directions for personalized therapy. Pharmacogenomic testing can enhance stroke pharmacotherapy, particularly in populations with high frequencies of actionable variants. Broader implementation requires rapid testing platforms, clinician education, tailored clinical guidelines, and real-world validation of aspirin, DOACs, and multi-gene approaches. Future research should expand population-specific studies and integrate pharmacogenomics within the broader framework of precision medicine to ensure equitable clinical benefit.
3.Long-term Outcomes of Bilateral Lateral Rectus Recession Using a Modified Normogram for Targeting Small Overcorrection in Intermittent Exotropia
Sanghyuk AHN ; Daniel Jinhag BAIK ; Seung-Hyun KIM
Korean Journal of Ophthalmology 2024;38(5):392-398
Purpose:
To evaluate the surgical outcomes of a modified normogram for bilateral lateral rectus recession in the surgical management of intermittent exotropia, with a focus on achieving small overcorrection.
Methods:
A retrospective medical chart review of 242 patients who underwent surgery for intermittent exotropia between October 2014 and June 2020 was performed. Our modified normogram reducing amount of recession targeted for small postoperative overcorrection within 5 prism diopters (PD). Patients were observed for at least 3 years. Esodeviation was denoted by negative numbers and positive values indicated exodeviation. A satisfactory outcome was defined as if distant angle of deviation ranged between ≤10 PD of exotropia and ≤5 PD of esotropia. Recurrence was defined as an exodeviation of >10 PD at distance. Overcorrection was defined as an esodeviation of >5 PD at distance.
Results:
The mean preoperative deviation angles were 29.32 ± 3.92 PD at distance and 29.88 ± 4.41 PD at near. At postoperative day 1, the mean deviation angles at distance and near were –6.22 ± 1.44 and –6.22 ± 1.49 PD, respectively. Overcorrection within 6 PD of esodeviation was seen in 168 patients (69.42%), undercorrection with exophoria was noted in 11 patients (4.55%), and overcorrection by more than 6 PD of esodeviation was seen in 63 patients (26.03%) at postoperative day 1. The long-term success rate at postoperative 3 years was 77.27% (187 of 242), with a recurrence rate of 19.83% (48 of 242) and an overcorrection rate of 2.89% (7 of 242). A positive correlation between the angle of deviation at postoperative day 1 and 3 years was observed (r = 0.22, p = 0.001). The final success rate at the final examination after a mean follow-up of 38.60 ± 7.99 months was 83.06%.
Conclusions
Our modified normogram for bilateral lateral rectus recession in intermittent exotropia surgery resulted in successful surgical outcomes with small overcorrection, reducing the risk of consecutive esotropia due to excessive overcorrection.
4.Reliability and Validity of a Tablet-Based Neuropsychological Test (the Hellocog) for Screening Dementia
Daniel Hahnsam SEOK ; Hee Won YANG ; Ji Won HAN ; Jin Hwan LIM ; Seon Hyeok KIM ; Eun Young KIM ; Ki Woong KIM
Psychiatry Investigation 2024;21(6):655-663
Objective:
To address the gap in timely diagnosis of dementia due to limited screening tools, we investigated the validity and reliability of the Hellocog, computerized neuropsychological test based on tablets for screening dementia. The higher the probability score on the Hellocog, the higher the likelihood of dementia.
Methods:
This study included 100 patients with dementia and 100 individuals with normal cognition who were aged 60 years or older and free of other major psychiatric, neurological, or medical conditions. They administered the Hellocog on a tablet under the supervision of a neuropsychologist. To determine test-retest reliability, 20 took the Hellocog again after 4 weeks. Diagnostic performance was assessed using the receiver operator characteristics (ROC) analysis.
Results:
The Hellocog showed adequate internal consistency (Cronbach’s alpha=0.69) and good test-retest reliability (intraclass correlation coefficient=0.86, p<0.001). Participants with dementia scored higher on the Hellocog than those with normal cognition (p<0.001), confirming its high criterion validity. Strong correlations with the Mini-Mental Status Examination (MMSE) score and the total score of the Consortium to Establish a Registry for Alzheimer’s Disease Neuropsychological Assessment Battery (CERAD-TS) highlight the concurrent validity of the Hellocog. The area under the ROC curve for dementia of the Hellocog was excellent (0.971) and comparable to that of the MMSE and CERAD-TS. The sensitivity and specificity for dementia were 0.945 and 0.872%, respectively, which were slightly better than those of the MMSE and CERAD-TS.
Conclusion
Hellocog stands out as a valid and reliable tool for self-administered dementia screening, with promise for improving early detection of dementia.
5.The Feasibility of Multiple Fixation Points in C2
Quyen Nguyen NGOC ; K. Daniel RIEW ; So Min LEE ; Sang-Min PARK ; Ho-Joong KIM ; Bong-Soon CHANG ; Sang-Hun LEE ; Jae Chul LEE ; Jin S. YEOM
Asian Spine Journal 2023;17(5):888-893
Methods:
We used 1.0-mm interval computed tomographic scan images of 100 patients (50 men and 50 women) and screw trajectory simulation software. The diameter of all screws was set at 3.5 mm, considering its common usage in real surgery. The anatomical feasibility of placing both pedicle and laminar screws on the same side was evaluated. For all feasible sides, the three-dimensional distance between the screw entry points was measured.
Results:
In 85% of cases, both pedicle and laminar screws could be placed on both sides, allowing for the insertion of 4 screws. In 11% of cases, 2 screws could be placed on one side, while only 1 screw was feasible on the other side, resulting in the placement of 3 screws. In all 181 sides where both types of screws could be inserted, the distance between their entry points exceeded 16.1 mm, which was sufficient to prevent the collision between the screw heads.
Conclusions
C2 vertebra can accommodate three (11%) or four (85%) screws in 96% of cases.
6.Do Magnets Have the Potential to Serve as a Stabilizer for the Shoulder Joint in Massive Rotator Cuff Tears?: A Biomechanical Cadaveric Study
Yoon Sang JEON ; Sang Hyun KO ; Yun Moon JEON ; Dong Jin RYU ; Jeong Seok KIM ; Hyun Soon PARK ; Min-Shik CHUNG ; Daniel KWAK ; Michelle H. MCGARRY ; Thay Q. LEE
Clinics in Orthopedic Surgery 2023;15(4):616-626
Background:
Disruption of the rotator cuff muscles compromises concavity compression force, which leads to superior migration of the humeral head and loss of stability. A novel idea of using the magnetic force to achieve shoulder stabilization in massive rotator cuff tears (MRCTs) was considered because the magnets can stabilize two separate entities with an attraction force. This study aimed to investigate the biomechanical effect of the magnetic force on shoulder stabilization in MRCTs.
Methods:
Seven fresh frozen cadaveric specimens were used with a customized shoulder testing system. Three testing conditions were set up: condition 1, intact rotator cuff without magnets; condition 2, an MRCT without magnets; condition 3, an MRCT with magnets. For each condition, anterior-posterior translation, superior translation, superior migration, and subacromial contact pressure were measured at 0°, 30°, and 60° of abduction. The abduction capability of condition 2 was compared with that of condition 3.
Results:
The anterior-posterior and superior translations increased in condition 2; however, they decreased compared to condition 2 when the magnets were applied (condition 3) in multiple test positions and loadings (p <0.05). Abduction capability improved significantly in condition 3 compared with that in condition 2, even for less deltoid loading (p < 0.05).
Conclusions
The magnet biomechanically played a positive role in stabilizing the shoulder joint and enabled abduction with less deltoid force in MRCTs. However, to ensure that the magnet is clinically applicable as a stabilizer for the shoulder joint, it is necessary to thoroughly verify its safety in the human body and to conduct further research on technical challenges.
7.Life satisfaction and self-efficacy of undergraduate occupational therapy students in a university in Metro Manila: A cross-sectional study
Kim Gerald Medallon ; Charles Bermejo ; Cesar Joseph Lim ; Miria Olivia Isabel Alvior ; Daniel Miguel Batain ; Chasid Bautista ; Karissa Anne Lee ; Maria Louise Abigail Morales ; Quincy Aaliyah Torre
Philippine Journal of Allied Health Sciences 2023;7(1):29-42
Background:
The COVID-19 pandemic has significantly disrupted students' lives and daily routines, resulting in increased stress and mental health
issues that impact their perceived life satisfaction and self-efficacy. While life satisfaction and self-efficacy may influence student academic
performance and success, current data on life satisfaction and self-efficacy in Filipino occupational therapy students is limited. Objectives: This
study aims to describe the life satisfaction and self-efficacy level of occupational therapy students at a university in Metro Manila, Philippines, during
the COVID-19 pandemic and explore the relationship between these two variables.
Methods:
The study adopted an analytic cross-sectional study
design and records review methodology utilizing the Student Life Survey 2021 database. Data from the survey participants who fit the study's
inclusion criteria were extracted to determine their life satisfaction and self-efficacy based on their responses on the Satisfaction with Life Scale and
Self-Efficacy Formative Questionnaire. Descriptive statistics using measures of central tendency and dispersion were used to analyze data.
Spearman-Rho correlation analysis was performed to examine the correlation between participants’ life satisfaction and self-efficacy.
Results:
A total of 205 occupational therapy students completed the survey. Results reveal that the participants were slightly dissatisfied with their lives
(M=18.45; SD=1.52) and that they had satisfactory or adequate self-efficacy (M=64.66; SD=1.37). An analysis of their self-efficacy scores reveals that
participants had a poor belief in their personal ability (M=37.71; SD=1.33) and a satisfactory or adequate belief that their ability can grow with
effort (M=26.92; SD=1.32). Life satisfaction and self-efficacy were found to decrease as the participants’ year level increased. Furthermore,
correlation analysis revealed a statistically significant moderate correlation between participants’ life satisfaction and self-efficacy (⍴=0.40, p<0.05).
Conclusion
The participants have a slightly dissatisfied level of life satisfaction and a satisfactory or adequate level of self-efficacy during the
COVID-19 pandemic. Life satisfaction and self-efficacy were found to have moderate correlation. Online learning adjustments, pandemic
restrictions, and societal expectations are factors that may have influenced these findings, as emphasized in existing studies. This study may inform
the academe in modifying existing learning environments and providing enhancement programs to deliberately target these constructs influencing
overall academic performance.
Self Efficacy
8.The Use of Phentermine for Obesity in Psychiatric Patients With Antipsychotics
Eunju KIM ; Daniel RIM ; Jeong-Hun SHIN ; Denise WONG ; Dong Wook KIM
Psychiatry Investigation 2023;20(9):799-807
Objective:
Phentermine is a commonly used weight-loss agent in the United States, but there is a little information about the use of phentermine for patients with obesity taking antipsychotic medications.
Methods:
We gathered 57 patients with obesity taking antipsychotic medications whose phentermine treatment was simultaneous with or after any type of antipsychotic exposure and collected data of clinical information, initial/follow-up anthropometric variables, and adverse events (AEs) for the 6-month study period.
Results:
In total, the mean body weight reduction (BWR) was 4.45 (7.04) kg, and the mean BWR percent (BWR%) was 3.92% (6.96%) at 6 months. Based on the response to phentermine, the patients were classified into two groups: the responder (n=25; BWR% ≥5%) and nonresponder (n=32; BWR% <5%) groups. The responder group’s mean BWR and BWR% were 10.13 (4.43) kg and 9.35% (4.09%), respectively, at 6 months. The responders had higher rates of anticonvulsant combination therapy (ACT; responder, 72.0% vs. non-responder, 43.8%; p=0.033) and a shorter total antipsychotic exposure duration (responder, 23.9 [16.9] months vs. non-responder, 37.2 [27.6] months; p= 0.039). After adjusting age, sex, and initial body weight, ACT maintained a significant association with phentermine response (odds ratio=3.840; 95% confidence interval: 1.082–13.630; p=0.037). In the final cohort, there was no report of adverse or new-onset psychotic symptoms, and the common AEs were sleep disturbances, dry mouth, and dizziness.
Conclusion
Overall, phentermine was effective and tolerable for patients with obesity taking antipsychotic medications, and ACT (predominantly topiramate) augmented the weight-loss effect of phentermine.
9.Recombinant proteins of spike protein of SARS-CoV-2 with the Omicron receptor-binding domain induce production of highly Omicron-specific neutralizing antibodies
Hyangju KANG ; Daniel KIM ; Kyungmin MIN ; Minhee PARK ; Seok-Hyun KIM ; Eun-Ju SOHN ; Bo-Hwa CHOI ; Inhwan HWANG
Clinical and Experimental Vaccine Research 2022;11(3):285-289
Various vaccines have been developed to fight severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus responsible for the coronavirus disease 2019 pandemic.However, new variants of SARS-CoV-2 undermine the effort to fight SARS-CoV-2. Here, we produced S proteins harboring the receptor-binding domain (RBD) of the Omicron variant in plants. Plant-produced S proteins together with adjuvant CIA09A triggered strong immune responses in mice. Antibodies in serum inhibited interaction of recombinant human angiotensinconverting enzyme 2 with RBD of the Omicron variant, but not RBD of other variants. These results suggest that antibodies induced by RBD of the Omicron variant are highly specific for the Omicron RBD, but not for that of other variants.
10.Global prevalence of depression and anxiety in patients with hepatocellular carcinoma: Systematic review and meta-analysis
Darren Jun Hao TAN ; Sabrina Xin Zi QUEK ; Jie Ning YONG ; Adithya SURESH ; Kaiser Xuan Ming KOH ; Wen Hui LIM ; Jingxuan QUEK ; Ansel TANG ; Caitlyn TAN ; Benjamin NAH ; Eunice TAN ; Taisei KEITOKU ; Mark D. MUTHIAH ; Nicholas SYN ; Cheng Han NG ; Beom Kyung KIM ; Nobuharu TAMAKI ; Cyrus Su Hui HO ; Rohit LOOMBA ; Daniel Q. HUANG
Clinical and Molecular Hepatology 2022;28(4):864-875
Background/Aims:
Depression and anxiety are associated with poorer outcomes in patients with hepatocellular carcinoma (HCC). However, the prevalence of depression and anxiety in HCC are unclear. We aimed to establish the prevalence of depression and anxiety in patients with HCC.
Methods:
MEDLINE and Embase were searched and original articles reporting prevalence of anxiety or depression in patients with HCC were included. A generalized linear mixed model with Clopper-Pearson intervals was used to obtain the pooled prevalence of depression and anxiety in patients with HCC. Risk factors were analyzed via a fractional-logistic regression model.
Results:
Seventeen articles involving 64,247 patients with HCC were included. The pooled prevalence of depression and anxiety in patients with HCC was 24.04% (95% confidence interval [CI], 13.99–38.11%) and 22.20% (95% CI, 10.07–42.09%) respectively. Subgroup analysis determined that the prevalence of depression was lowest in studies where depression was diagnosed via clinician-administered scales (16.07%;95% CI, 4.42–44.20%) and highest in self-reported scales (30.03%; 95% CI, 17.19–47.01%). Depression in patients with HCC was lowest in the Americas (16.44%; 95% CI, 6.37–36.27%) and highest in South-East Asia (66.67%; 95% CI, 56.68–75.35%). Alcohol consumption, cirrhosis, and college education significantly increased risk of depression in patients with HCC.
Conclusions
One in four patients with HCC have depression, while one in five have anxiety. Further studies are required to validate these findings, as seen from the wide CIs in certain subgroup analyses. Screening strategies for depression and anxiety should also be developed for patients with HCC.


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