Displaying publications 1 - 20 of 26 in total

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  1. Wu Y, Levis B, Daray FM, Ioannidis JPA, Patten SB, Cuijpers P, et al.
    Psychol Assess, 2023 Feb;35(2):95-114.
    PMID: 36689386 DOI: 10.1037/pas0001181
    The seven-item Hospital Anxiety and Depression Scale Depression subscale (HADS-D) and the total score of the 14-item HADS (HADS-T) are both used for major depression screening. Compared to the HADS-D, the HADS-T includes anxiety items and requires more time to complete. We compared the screening accuracy of the HADS-D and HADS-T for major depression detection. We conducted an individual participant data meta-analysis and fit bivariate random effects models to assess diagnostic accuracy among participants with both HADS-D and HADS-T scores. We identified optimal cutoffs, estimated sensitivity and specificity with 95% confidence intervals, and compared screening accuracy across paired cutoffs via two-stage and individual-level models. We used a 0.05 equivalence margin to assess equivalency in sensitivity and specificity. 20,700 participants (2,285 major depression cases) from 98 studies were included. Cutoffs of ≥7 for the HADS-D (sensitivity 0.79 [0.75, 0.83], specificity 0.78 [0.75, 0.80]) and ≥15 for the HADS-T (sensitivity 0.79 [0.76, 0.82], specificity 0.81 [0.78, 0.83]) minimized the distance to the top-left corner of the receiver operating characteristic curve. Across all sets of paired cutoffs evaluated, differences of sensitivity between HADS-T and HADS-D ranged from -0.05 to 0.01 (0.00 at paired optimal cutoffs), and differences of specificity were within 0.03 for all cutoffs (0.02-0.03). The pattern was similar among outpatients, although the HADS-T was slightly (not nonequivalently) more specific among inpatients. The accuracy of HADS-T was equivalent to the HADS-D for detecting major depression. In most settings, the shorter HADS-D would be preferred. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
  2. Wu Y, Levis B, Sun Y, Krishnan A, He C, Riehm KE, et al.
    J Psychosom Res, 2020 02;129:109892.
    PMID: 31911325 DOI: 10.1016/j.jpsychores.2019.109892
    OBJECTIVE: Two previous individual participant data meta-analyses (IPDMAs) found that different diagnostic interviews classify different proportions of people as having major depression overall or by symptom levels. We compared the odds of major depression classification across diagnostic interviews among studies that administered the Depression subscale of the Hospital Anxiety and Depression Scale (HADS-D).

    METHODS: Data accrued for an IPDMA on HADS-D diagnostic accuracy were analysed. We fit binomial generalized linear mixed models to compare odds of major depression classification for the Structured Clinical Interview for DSM (SCID), Composite International Diagnostic Interview (CIDI), and Mini International Neuropsychiatric Interview (MINI), controlling for HADS-D scores and participant characteristics with and without an interaction term between interview and HADS-D scores.

    RESULTS: There were 15,856 participants (1942 [12%] with major depression) from 73 studies, including 15,335 (97%) non-psychiatric medical patients, 164 (1%) partners of medical patients, and 357 (2%) healthy adults. The MINI (27 studies, 7345 participants, 1066 major depression cases) classified participants as having major depression more often than the CIDI (10 studies, 3023 participants, 269 cases) (adjusted odds ratio [aOR] = 1.70 (0.84, 3.43)) and the semi-structured SCID (36 studies, 5488 participants, 607 cases) (aOR = 1.52 (1.01, 2.30)). The odds ratio for major depression classification with the CIDI was less likely to increase as HADS-D scores increased than for the SCID (interaction aOR = 0.92 (0.88, 0.96)).

    CONCLUSION: Compared to the SCID, the MINI may diagnose more participants as having major depression, and the CIDI may be less responsive to symptom severity.

  3. Loo LWJ, Chew QH, Lin SK, Yang SY, Ouyang WC, Chen CK, et al.
    PMID: 37068038 DOI: 10.1097/JCP.0000000000001693
    BACKGROUND: Pharmacoepidemiological studies of clozapine use to treat bipolar disorder (BD), especially in Asia, are rare, although they can provide insights into associated clinical characteristics and support international comparisons of indications and drug dosing.

    METHODS: We examined the prevalence and clinical correlates of clozapine treatment for BD in 13 Asian countries and regions (China, Hong Kong SAR, India, Indonesia, Japan, Korea, Malaysia, Myanmar, Pakistan, Singapore, Sri Lanka, Taiwan, and Thailand) within an Asian Prescription Patterns Research Consortium. We compared BD patients treated with clozapine or not in initial bivariate comparisons followed by multivariable logistic regression modeling.

    RESULTS: Clozapine was given to 2.13% of BD patients overall, at a mean daily dose of 275 (confidence interval, 267-282) chlorpromazine-equivalent mg/day. Patients receiving clozapine were older, more likely males, hospitalized, currently manic, and given greater numbers of mood-stabilizing and antipsychotic drugs in addition to clozapine. Logistic regression revealed that older age, male sex, current mania, and greater number of other antipsychotics remained significantly associated with clozapine treatment. Clozapine use was not associated with depressed mood, remission of illness, suicidal risk, or electroconvulsive treatment within the previous 12 months.

    CONCLUSIONS: The identified associations of clozapine use with particular clinical features call for vigilance in personalized clinical monitoring so as to optimize clinical outcomes of BD patients and to limit risks of adverse effects of polytherapy.

  4. Chen CK, Yang SY, Park SC, Jang OJ, Zhu X, Xiang YT, et al.
    Asian J Psychiatr, 2023 Jul;85:103613.
    PMID: 37163943 DOI: 10.1016/j.ajp.2023.103613
    OBJECTIVE: Mood stabilizers are psychotropic drugs mainly used to treat bipolar disorder in the acute phase or for maintenance therapy to prevent relapse. In clinical practice, mood stabilizers are commonly prescribed for conditions other than bipolar disorder. This study investigated the distribution of mood stabilizer prescriptions for different psychiatric diagnoses and studied differences in the drugs, dosage, and plasma concentration in 10 Asian countries including Taiwan, South Korea, Malaysia, China, Thailand, India, Pakistan, Singapore, Indonesia, and Myanmar.

    METHODS: Patients prescribed mood stabilizers (lithium, carbamazepine, valproic acid, or lamotrigine) for a psychiatric condition other than bipolar disorder (codes F31.0-F31.9 in the International Classification of Diseases, 10th Edition, Clinical Modification) were recruited through convenience sampling. A website-based data entry system was used for data collection.

    RESULTS: In total, 1557 psychiatric patients were enrolled. Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (F20-F29, 55.8 %) was the most common diagnosis, followed by non-bipolar mood disorders (F30, F31- F39, 25.3 %), organic mental disorder (F00-F09, 8.8 %), mental retardation (F70-F79, 5.8 %) and anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48, 4.4 %). The most frequently targeted symptoms (>20 %) were irritability (48 %), impulsivity (32.4 %), aggression (29.2 %), anger (20.8 %), and psychosis (24.1 %). Valproic acid was the most frequently used medication.

    CONCLUSIONS: Clinicians typically prescribe mood stabilizers as empirically supported treatment to manage mood symptoms in patients with diagnoses other than bipolar disorders, though there is on official indication for these disorders. The costs and benefits of this add-on symptomatic treatment warrant further investigation.

  5. Shuy YK, Santharan S, Chew QH, Lin SK, Ouyang WC, Chen CK, et al.
    J Clin Psychopharmacol, 2024 01 16;44(2):117-123.
    PMID: 38230861 DOI: 10.1097/JCP.0000000000001813
    BACKGROUND: As clinical practices with lithium salts for patients diagnosed with bipolar disorder (BD) are poorly documented in Asia, we studied the prevalence and clinical correlates of lithium use there to support international comparisons.

    METHODS: We conducted a cross-sectional study of use and dosing of lithium salts for BD patients across 13 Asian sites and evaluated bivariate relationships of lithium treatment with clinical correlates followed by multivariate logistic regression modeling.

    RESULTS: In a total of 2139 BD participants (52.3% women) of mean age 42.4 years, lithium salts were prescribed in 27.3% of cases overall, varying among regions from 3.20% to 59.5%. Associated with lithium treatment were male sex, presence of euthymia or mild depression, and a history of seasonal mood change. Other mood stabilizers usually were given with lithium, often at relatively high doses. Lithium use was associated with newly emerging and dose-dependent risk of tremors as well as risk of hypothyroidism. We found no significant differences in rates of clinical remission or of suicidal behavior if treatment included lithium or not.

    CONCLUSIONS: Study findings clarify current prevalence, dosing, and clinical correlates of lithium treatment for BD in Asia. This information should support clinical decision-making regarding treatment of BD patients and international comparisons of therapeutic practices.

  6. Clark CS, Rampal KG, Thuppil V, Roda SM, Succop P, Menrath W, et al.
    Environ Res, 2009 Oct;109(7):930-6.
    PMID: 19656507 DOI: 10.1016/j.envres.2009.07.002
    In 2006 a report on the analysis for lead in 80 new residential paints from four countries in Asia revealed high levels in three of the countries (China, India and Malaysia) and low levels in a fourth country (Singapore) where a lead in paint regulation was enforced. The authors warned of the possible export of lead-painted consumer products to the United States and other countries and the dangers the lead paint represented to children in the countries where it was available for purchase. The need for a worldwide ban on the use of lead in paints was emphasized to prevent an increase in exposure and disease from this very preventable environmental source. Since the earlier paper almost 300 additional new paint samples have been collected from the four initial countries plus 8 additional countries, three from Asia, three from Africa and two from South America. During the intervening time period two million toys and other items imported into the United States were recalled because the lead content exceeded the United States standard. High lead paints were detected in all 12 countries. The average lead concentration by country ranged from 6988 (Singapore) to 31,960ppm (Ecuador). One multinational company sold high lead paint in one country through January 2007 but sold low lead paint later in 2007 indicating that a major change to cease adding lead to their paints had occurred. However, the finding that almost one-third of the samples would meet the new United States standard for new paint of 90ppm, suggests that the technology is already available in at least 11 of the 12 countries to produce low lead enamel paints for domestic use. The need remains urgent to establish effective worldwide controls to prevent the needless poisoning of millions of children from this preventable exposure.
  7. Seo DC, Torabi MR, Chin MK, Huang SF, Chen CK, Mok MM, et al.
    Int J Behav Med, 2012 Sep;19(3):316-23.
    PMID: 21562780 DOI: 10.1007/s12529-011-9167-4
    BACKGROUND: Little is known on the level of physical inactivity and its behavioral and cultural correlates among East Asian college students.
    PURPOSE: The aim of this study is to examine and compare the level and behavioral and cultural correlates of physical inactivity among college students in Taiwan, Hong Kong, South Korea, Singapore, and Malaysia.
    METHOD: Data were collected from a representative sample of college students (N = 12,137) in five East Asian economies during the 2008-2009 academic year. The stratified random sampling (stratum: geographic region) was used to select participating institutions. The overall response rate was 77%.
    RESULTS: The percentage of physically inactive students was 7.2% for Singapore, 8.0% for Malaysia, 13.5% for Taiwan, 16.8% for Hong Kong, and 28.5% for South Korea. When gender, age, and body mass index were controlled, fruit and vegetable consumptions were significant correlates for physical inactivity across all the five economies. In Hong Kong, Korea, and Taiwan, those who engaged in binge drinking at least once during the past 2 weeks were less likely to be physically inactive than those who did not. Religion and military experience did not independently predict physical inactivity in any of the five economies.
    CONCLUSION: Physical inactivity varies greatly across different economies in East Asia that are usually grouped together and considered a single homogeneous entity by some researchers. However, in terms of correlates of physical inactivity, findings of the current study indicate that the transversal value of physical activity might be transformed into a universal.
  8. Chen CK, Mohamad WM, Ooi FK, Ismail SB, Abdullah MR, George A
    Int J Prev Med, 2014 Jun;5(6):728-33.
    PMID: 25013692
    Background: Eurycoma longifolia Jack (ElJ) has been shown to elevate serum testosterone and increased muscle strength in humans. This study investigated the effects of Physta(®) a standardized water extract of ElJ (400 mg/day for 6 weeks) on testosterone: epitestosterone (T:E) ratio, liver and renal functions in male recreational athletes.

    Methods: A total of 13 healthy male recreational athletes were recruited in this double blind, placebo-controlled, cross-over study. The participants were required to consume either 400 mg of ElJ or placebo daily for 6 weeks in the first supplementation regimen. Following a 3 week wash-out period, the participants were requested to consume the other supplement for another 6 weeks. Mid-stream urine samples and blood samples were collected prior to and after 6 weeks of supplementation with either ElJ or placebo. The urine samples were subsequently analyzed for T:E ratio while the blood samples were analyzed for liver and renal functions.

    Results: T:E ratio was not significantly different following 6 weeks supplementation of either ElJ or placebo compared with their respective baseline values. Similarly, there were no significant changes in both the liver and renal functions tests following the supplementation of ElJ.

    Conclusions: Supplementation of ElJ i.e. Physta(®) at a dosage of 400 mg/day for 6 weeks did not affect the urinary T:E ratio and hence will not breach any doping policies of the International Olympic Committee for administration of exogenous testosterone or its precursor. In addition, the supplementation of ElJ at this dosage and duration was safe as it did adversely affect the liver and renal functions.

    Keywords: Doping; Eurycoma longifolia Jack; liver function; renal function; testosterone: epitestosterone ratio.
  9. Ibrahim NS, Muhamad AS, Ooi FK, Meor-Osman J, Chen CK
    Appl Physiol Nutr Metab, 2018 Feb;43(2):180-186.
    PMID: 29024599 DOI: 10.1139/apnm-2017-0464
    To our knowledge, the efficacy of combined probiotic supplementation with circuit training has not been evaluated. Thus, we investigated the effects of probiotic supplementation combined with circuit training on isokinetic muscular strength and power and cytokine responses in young males. Forty-eight healthy sedentary young males were recruited and randomised into 4 separate groups: sedentary placebo control, probiotics (P), circuit training with placebo (CT), and circuit training with probiotics (CTP). Participants in the CT and CTP groups performed circuit training 3 times/week with 2 circuits of exercises from weeks 1-8 followed by 3 circuits of exercises from weeks 9-12. Participants in the P and CTP groups consumed multi-strain probiotics containing 3 × 1010 colony-forming units of Lactobacillus acidophilus, L. lactis, L. casei, Bifidobacterium longum, B. bifidum and B. infantis twice daily for 12 weeks. Measurements of body height and weight, blood pressure, resting heart rate, blood samples, and isokinetic muscular strength and power were carried out at pre- and post-tests. Isokinetic knee strength and power in CT and CTP groups were significantly higher (P < 0.05) at post-test. In addition, interleukin (IL)-10 concentration was significantly increased (P < 0.0001) at post-test in P and CT but a trend toward significant increase in CTP (P = 0.09). Nevertheless, there was no significant difference in IL-6. This study suggests that 12 weeks of circuit training alone and the combination of circuit training and probiotic consumption improved muscular performance while circuit training alone and probiotics alone increased IL-10 concentration.
  10. Tavafzadeh SS, Ooi FK, Chen CK, Sulaiman SA, Hung LK
    Biomed Res Int, 2015;2015:938782.
    PMID: 26176016 DOI: 10.1155/2015/938782
    This study investigated effects of cessation of exercise and honey supplementation on bone properties in young female rats. Eighty-four 12-week-old Sprague-Dawley female rats were divided into 7 groups: 16S, 16J, 16H, 16JH, 8J8S, 8H8S, and 8JH8S (8 = 8 weeks, 16 = 16 weeks, S = sedentary without honey supplementation, H = honey supplementation, and J = jumping exercise). Jumping exercise consisted of 40 jumps/day for 5 days/week. Honey was given to the rats at a dosage of 1 g/kg body weight/rat/day via force feeding for 7 days/week. Jumping exercise and honey supplementation were terminated for 8 weeks in 8J8S, 8H8S, and 8JH8S groups. After 8 weeks of cessation of exercise and honey supplementation, tibial energy, proximal total bone density, midshaft cortical moment of inertia, and cortical area were significantly higher in 8JH8S as compared to 16S. Continuous sixteen weeks of combined jumping and honey resulted in significant greater tibial maximum force, energy, proximal total bone density, proximal trabecular bone density, midshaft cortical bone density, cortical area, and midshaft cortical moment of inertia in 16JH as compared to 16S. These findings showed that the beneficial effects of 8 weeks of combined exercise and honey supplementation still can be observed after 8 weeks of the cessation and exercise and supplementation.
  11. Tavafzadeh SS, Chen CK, Ooi FK, Hamzah NA, Sulaiman SA, Osman JM
    Malays J Med Sci, 2023 Jun;30(3):151-166.
    PMID: 37425377 DOI: 10.21315/mjms2023.30.3.14
    BACKGROUND: Regular physical activity and proper nutritional intake are crucial for bone health. However, it is unclear if this health benefit is maintained after the removal of these stimuli. This study investigated the combined effects of aerobic dance exercise and honey supplementation, followed by their subsequent cessation on bone metabolism markers and antioxidant status in females.

    METHODS: Forty-eight young female college students were assigned into four groups: i) 16S (16 weeks of sedentary activity); ii) 8E×8S (8 weeks of exercise followed by 8 weeks of sedentary activity); iii) 8H8S (8 weeks of honey supplementation followed by 8 weeks of sedentary activity) and iv) 8E×H8S (8 weeks of combined exercise and honey supplementation followed by 8 weeks of sedentary activity). Blood samples were collected from the participants prior to the intervention, at week 8 and at week 16 for the analysis of bone metabolism markers and antioxidant status.

    RESULTS: At the mid test, bone speed of sound (SOS) (P < 0.01), serum alkaline phosphatase (ALP) (P < 0.001) and serum osteocalcin (P < 0.01) were significantly higher in the 8E×H8S group as compared to 16S group. After 8 weeks of cessation of exercise and honey supplementation, bone SOS was also significantly higher (P < 0.001) in the 8E×H8S group as compared to 16S group. In addition, the serum total calcium (P < 0.001), serum ALP (P < 0.01), total antioxidant status (TAS) (P < 0.01) and glutathione (GSH) (P < 0.01) in the 8E×H8S group were significantly higher at the post-test as compared to their respective pre-test values.

    CONCLUSION: These findings demonstrate that there was improved maintenance of the beneficial effects induced by 8 weeks of combined exercise and honey supplementation on bone properties and the antioxidant status after 8 weeks of cessation of exercise and honey supplementation as compared to exercise and honey supplementation alone.

  12. Chen CK, Phui VE, Nizar AJ, Yeo SN
    Korean J Pain, 2013 Oct;26(4):401-5.
    PMID: 24156009 DOI: 10.3344/kjp.2013.26.4.401
    Complex regional pain syndrome secondary to brachial plexus injury is often severe, debilitating and difficult to manage. Percuteneous radiofrequency sympathectomy is a relatively new technique, which has shown promising results in various chronic pain disorders. We present four consecutive patients with complex regional pain syndrome secondary to brachial plexus injury for more than 6 months duration, who had undergone percutaneous T2 and T3 radiofrequency sympathectomy after a diagnostic block. All four patients experienced minimal pain relief with conservative treatment and stellate ganglion blockade. An acceptable 6 month pain relief was achieved in all 4 patients where pain score remained less than 50% than that of initial score and all oral analgesics were able to be tapered down. There were no complications attributed to this procedure were reported. From this case series, percutaneous T2 and T3 radiofrequency sympathectomy might play a significant role in multi-modal approach of CRPS management.
  13. Chen CK, Tan PC, Phui VE, Teo SC
    Korean J Anesthesiol, 2013 Jun;64(6):511-6.
    PMID: 23814651 DOI: 10.4097/kjae.2013.64.6.511
    The ultrasound-guided oblique subcostal transversus abdominis plane (OSTAP) block provides a wider area of sensory block to the anterior abdominal wall than the classical posterior approach. We compared the intra-operative analgesic efficacy of OSTAP block with conventional intravenous (IV) morphine during laparoscopic cholecystectomy.
  14. Liau KM, Lee YY, Chen CK, Rasool AH
    ISRN Pharmacol, 2011;2011:949686.
    PMID: 22164340 DOI: 10.5402/2011/949686
    Introduction. This is an open-label pilot study on four weeks of virgin coconut oil (VCO) to investigate its efficacy in weight reduction and its safety of use in 20 obese but healthy Malay volunteers. Methodology. Efficacy was assessed by measuring weight and associated anthropometric parameters and lipid profile one week before and one week after VCO intake. Safety was assessed by comparing organ function tests one week before and one week after intake of VCO. Paired t-test was used to analyse any differences in all the measurable variables. Results. Only waist circumference (WC) was significantly reduced with a mean reduction of 2.86 cm or 0.97% from initial measurement (P = .02). WC reduction was only seen in males (P < .05). There was no change in the lipid profile. There was a small reduction in creatinine and alanine transferase levels. Conclusion. VCO is efficacious for WC reduction especially in males and it is safe for use in humans.
  15. Clark CS, Rampal KG, Thuppil V, Chen CK, Clark R, Roda S
    Environ Res, 2006 Sep;102(1):9-12.
    PMID: 16782088
    Worldwide prohibitions on lead gasoline additives were a major international public health accomplishment, the results of which are still being documented in parts of the world. Although the need to remove lead from paints has been recognized for over a century, evidence reported in this article indicates that lead-based paints for household use, some containing more than 10% lead, are readily available for purchase in some of the largest countries in the world. Sixty-six percent of new paint samples from China, India, and Malaysia were found to contain 5000 ppm (0.5%) or more of lead, the US definition of lead-based paint in existing housing, and 78% contained 600 ppm (0.06%) or more, the limit for new paints. In contrast, the comparable levels in a nearby developed country, Singapore, were 0% and 9%. In examining lead levels in paints of the same brands purchased in different countries, it was found that some brands had lead-based paints in one of the countries and paints meeting US limits in another; another had lead-free paint available in all countries where samples were obtained. Lead-based paints have already poisoned millions of children and likely will cause similar damage in the future as paint use increases as countries in Asia and elsewhere continue their rapid development. The ready availability of lead-based paints documented in this article provides stark evidence of the urgent need for efforts to accomplish an effective worldwide ban on the use of lead in paint.
  16. Chen CK, Teo SC, Phui VE, Saman MA
    Agri, 2015;27(4):210-4.
    PMID: 26860495 DOI: 10.5505/agri.2015.66487
    The application of ultrasound-guided transversus abdominis plane (TAP) block in paediatric population is gaining popularity among anaesthetists. We present a case series of ultrasound-guided TAP block in ten neonate and infants undergoing colostomy and reversal of stoma. Classical TAP as described by Hebbard was carried out and a maximum dosage of 1ml/kg of 0.25% levobupivacaine was injected. Pain score was assessed using Neonatal Infant Pain Scale for 24 hours. In all patients, the block was successful with minimal hemodynamic changes intraoperatively and no additional systemic analgesia was needed intraoperative and immediate postoperatively. Ultrasound-guided TAP block has an important role in providing safe and effective analgesia for colostomy creation and reversal of stoma surgeries in paediatric population.
  17. Chen CK, Ooi FK, Abu Kasim NA, Asari MA
    Int J Prev Med, 2019;10:118.
    PMID: 31367282 DOI: 10.4103/ijpvm.IJPVM_404_17
    Introduction: This study investigated the effects of resistance training and Eurycoma longifolia Jack supplementation on isokinetic muscular strength and power, Wingate anaerobic power, and testosterone: epitestosterone (T/E) ratio in young males.

    Methods: Forty young males were weight-matched and assigned into four groups: control (C), Eurycoma longifolia jack (ElJ), resistance training (RT), and Eurycoma longifolia Jack plus resistance training group (ElJ & RT). Participants in ElJ and ElJ & RT groups consumed 200 mg Eurycoma longifolia Jack daily, whereas participants in the C and RT groups consumed placebo capsules daily for 8 weeks. Resistance training program which consisted of 10 different exercises was conducted three times per week for 8 weeks. Participants' isokinetic muscular strength and power, anaerobic power, and urinary TE ratio were measured before and after the intervention period. This is a randomized placebo-controlled intervention study. Paired t-test and one-way analysis of variance were used for statistical analysis.

    Results: The mean average power of knee flexion at 300°/s in the RT and ElJ & RT groups was significantly (P < 0.05) higher in the posttest compared with pretest. Wingate relative peak power in the RT group increased significantly (P < 0.05) compared with respective pretest value, whereas peak power in the combined ElJ & RT group was significantly (P < 0.05) higher in posttest compared with pretest. There was no significant difference in T/E ratio between pre- and posttests in all the groups.

    Conclusions: The prescribed resistance training program, either with or without ElJ supplementation, improved isokinetic power of the lower limb. Resistance training alone improved relative anaerobic power, whereas combined Eurycoma longifolia Jack and resistance training improved peak power output. ElJ consumption of 200 mg daily for 8 weeks did not affect the urinary T/E ratio.

  18. Chen CK, Lau FC, Lee WG, Phui VE
    J Clin Anesth, 2016 Sep;33:75-80.
    PMID: 27555137 DOI: 10.1016/j.jclinane.2016.03.007
    STUDY OBJECTIVES: To compare the anesthetic potency and safety of spinal anesthesia with higher dosages of levobupivacaine and bupivacaine in patients for bilateral sequential for total knee arthroplasty (TKA).

    DESIGN: Retrospective cohort study.

    SETTING: Operation theater with postoperative inpatient follow-up.

    PATIENTS: The medical records of 315 patients who underwent sequential bilateral TKA were reviewed.

    INTERVENTIONS: Patients who received intrathecal levobupicavaine 0.5% were compared with patients who received hyperbaric bupivacaine 0.5% with fentanyl 25 μg for spinal anesthesia.

    MEASUREMENTS: The primary outcome was the use of rescue analgesia (systemic opioids, conversion to general anesthesia) during surgery for both groups. Secondary outcomes included adverse effects of local anesthetics (hypotension and bradycardia) during surgery and morbidity related to spinal anesthesia (postoperative nausea, vomiting, and bleeding) during hospital stay.

    MAIN RESULTS: One hundred fifty patients who received intrathecal levobupivacaine 0.5% (group L) were compared with 90 patients given hyperbaric bupivacaine 0.5% with fentanyl 25 μg (group B). The mean volume of levobupivacaine administered was 5.8 mL (range, 5.0-6.0 mL), and that of bupivacaine was 3.8 mL (range, 3.5-4.0 mL). Both groups achieved similar maximal sensory level of block (T6). The time to maximal height of sensory block was significantly shorter in group B than group L, 18.2 ± 4.5 vs 23.9 ± 3.8 minutes (P< .001). The time to motor block of Bromage 3 was also shorter in group B (8.7 ± 4.1 minutes) than group L (16.0 ± 4.5 minutes) (P< .001). Patients in group B required more anesthetic supplement than group L (P< .001). Hypotension and postoperative bleeding were significantly less common in group L than group B.

    CONCLUSION: Levobupivacaine at a higher dosage provided longer duration of spinal anesthesia with better safety profile in sequential bilateral TKA.

  19. Ibrahim NS, Ooi FK, Chen CK, Muhamad AS
    J Sports Med Phys Fitness, 2017 07 05;58(7-8):1102-1109.
    PMID: 28677946 DOI: 10.23736/S0022-4707.17.07742-8
    BACKGROUND: Growing evidence suggests that probiotics may have positive benefits on immune responses following endurance exercise. However, little attention has been given to its possible beneficial effects on immune responses following resistance exercise.

    METHODS: Forty-one healthy sedentary males were recruited and randomised into four groups: sedentary control with placebo (C), probiotics (P), circuit training with placebo (Ex), and circuit training with probiotics (PEx) groups. Participants in the Ex and PEx groups performed a progressive load of circuit training at 3 times/week for 12 weeks. Each circuit comprised 10 exercises with work to rest ratio of 1:2. Participants consumed either multi-strain probiotics or placebo twice daily for 12 weeks. Body height and weight, blood pressure, resting heart rate, saliva and blood samples were collected at pre- and post-tests.

    RESULTS: Saliva flow rate and salivary IgA, α-amylase, lactoferrin and lysozyme responses were not significantly different (P>0.05) between groups and also between pre- and post-test within each group. Similarly, total leukocytes, total lymphocytes, T lymphocytes, T-helper, T-cytotoxic, B lymphocytes, and natural killer cells counts were not significantly affected (P>0.05) by the probiotics and/or circuit training. However, circuit training significantly increased (P<0.05) immune cells count at post-test as compared to pre-test. Yet, a combination of circuit training and probiotics showed no significant (P>0.05) effects on immune cells count.

    CONCLUSIONS: This study did not provide enough support for the positive effects of probiotics on immune responses among sedentary young males following resistance exercise. However, 12 weeks of circuit training enhanced immune cells count.

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