Displaying publications 61 - 80 of 2151 in total

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  1. Yusoff MS, Esa AR, Mat Pa MN, Mey SC, Aziz RA, Abdul Rahim AF
    Educ Health (Abingdon), 2013 Jan-Apr;26(1):39-47.
    PMID: 23823672 DOI: 10.4103/1357-6283.112800
    CONTEXT: There is considerable evidence that emotional intelligence, previous academic achievement (i.e. cumulative grade point average (GPA)) and personality are associated with success in various occupational settings. This study evaluated the relationships of these variables with psychological health of first year medical students during stressful periods.
    METHODS: A 1-year prospective study was done with students accepted into the School of Medical Sciences, Universiti Sains Malaysia. Information on emotional intelligence, GPA and personality traits were obtained prior to admission. The validated Universiti Sains Malaysia Emotional Quotient Inventory and Universiti Sains Malaysia Personality Inventory were used to measure emotional intelligence and personality traits, respectively. Stress, anxiety and depression were measured by the 21-item Depression Anxiety Stress Scale during the end-of-course (time 1) and final (time 2) examinations.
    RESULTS: At the less stressful period (time 1), stress level was associated with agreeableness and the final GPA, anxiety level was associated with emotional control and emotional conscientiousness and depression level was associated with the final GPA and extraversion. At the more stressful period (time 2), neuroticism associated with stress level, anxiety level was associated with neuroticism and emotional expression, and depression level was associated with neuroticism.
    CONCLUSIONS: This study found that neuroticism was the strongest associated factor of psychological health of medical students during their most stressful testing period. Various personality traits, emotional intelligence and previous academic performance were associated factors of psychological health during a less stressful period. These data suggest that early identification of medical students who are vulnerable to the stressful environment of medical schools might help them maintain psychological well-being during medical training.
    Matched MeSH terms: Prospective Studies
  2. Toh TH, Abdul-Aziz NA, Yahya MA, Goh KJ, Loh EC, Capelle DP, et al.
    Clin Neurophysiol, 2021 10;132(10):2722-2728.
    PMID: 34312065 DOI: 10.1016/j.clinph.2021.05.034
    OBJECTIVE: We aimed to develop a model to predict amyotrophic lateral sclerosis (ALS) disease progression based on clinical and neuromuscular ultrasound (NMUS) parameters.

    METHODS: ALS patients were prospectively recruited. Muscle fasciculation (≥2 over 30-seconds, examined in biceps brachii-brachialis (BB), brachioradialis, tibialis anterior and vastus medialis) and nerve cross-sectional area (CSA) (median, ulnar, tibial, fibular nerve) were evaluated through NMUS. Ultrasound parameters were correlated with clinical data, including revised ALS Functional Rating Scale (ALSFRS-R) progression at one year. A predictive model was constructed to differentiate fast progressors (ALSFRS-R decline ≥ 1/month) from non-fast progressors.

    RESULTS: 40 ALS patients were recruited. Three parameters emerged as strong predictors of fast progressors: (i) ALSFRS-R slope at time of NMUS (p = 0.041), (ii) BB fasciculation count (p = 0.027) and (iii) proximal to distal median nerve CSA ratio 

    Matched MeSH terms: Prospective Studies
  3. Hui DS, Ip M, Ling T, Chang SC, Liao CH, Yoo CG, et al.
    Respirology, 2011 Apr;16(3):532-9.
    PMID: 21299688 DOI: 10.1111/j.1440-1843.2011.01943.x
    Antimicrobial resistance is a global problem and the prevalence is high in many Asian countries.
    Matched MeSH terms: Prospective Studies
  4. J Paediatr Child Health, 1997 Feb;33(1):18-25.
    PMID: 9069039
    OBJECTIVE: To determine the risk factors associated with mortality in very low birthweight (VLBW) infants admitted to the neonatal intensive care units (NIUC) in Malaysia.

    METHOD: A prospective observational study of outcome of all VLBW infants born between 1 January 1993 and 30 June 1993 and admitted to the NICU.

    RESULTS: Data of 868 VLBW neonates from 18 centres in Malaysia were collected. Their mean birthweight was 1223 g (95% confidence intervals: 1208-1238 g). Thirty-seven point four per cent (325/868) of these infants died before discharge. After exclusion of all infants with congenital anomalies (n = 66, and nine of them also had incomplete records) and incomplete records (n = 82), stepwise logistic regression analysis of the remaining 720 infants showed that the risk factors that were significantly associated with increased mortality before discharge were: delivery in district hospitals, Chinese race, lower birthweight, lower gestation age, persistent pulmonary hypertension of the newborn, pulmonary airleak, necrotizing enterocolitis of stage 2 or 3, confirmed sepsis, hypotension, hypothermia, acute renal failure, intermittent positive pressure ventilation, and umbilical arterial catheterization. Factors that were significantly associated with lower risk of mortality were: use of antenatal steroid, oxygen therapy, surfactant therapy and blood transfusion.

    CONCLUSION: The mortality of VLBW infants admitted to the Malaysian NICU was high and was also associated with a number of preventable risk factors.

    Matched MeSH terms: Prospective Studies
  5. Waran V, Tang IP, Karuppiah R, Abd Kadir KA, Chandran H, Muthusamy KA, et al.
    Br J Neurosurg, 2013 Dec;27(6):742-6.
    PMID: 23647078 DOI: 10.3109/02688697.2013.791667
    Abstract The endoscopic transnasal, transsphenoidal surgical technique for pituitary tumour excision has generally been regarded as a less invasive technique, ranging from single nostril to dual nostril techniques. We propose a single nostril technique using a modified nasal speculum as a preferred technique. We initially reviewed 25 patients who underwent pituitary tumour excision, via endoscopic transnasal transsphenoidal surgery, using this new modified speculum-guided single nostril technique. The results show shorter operation time with reduced intra- and post-operative nasal soft tissue injuries and complications.
    Matched MeSH terms: Prospective Studies
  6. Chan WK, Nik Mustapha NR, Mahadeva S
    Hepatol Int, 2015 Oct;9(4):594-602.
    PMID: 25788185 DOI: 10.1007/s12072-014-9596-7
    BACKGROUND: The non-alcoholic fatty liver disease (NAFLD) fibrosis score (NFS) is indeterminate in a proportion of NAFLD patients. Combining the NFS with liver stiffness measurement (LSM) may improve prediction of advanced fibrosis. We aim to evaluate the NFS and LSM in predicting advanced fibrosis in NAFLD patients.

    METHODS: The NFS was calculated and LSM obtained for consecutive adult NAFLD patients scheduled for liver biopsy. The accuracy of predicting advanced fibrosis using either modality and in combination were assessed. An algorithm combining the NFS and LSM was developed from a training cohort and subsequently tested in a validation cohort.

    RESULTS: There were 101 and 46 patients in the training and validation cohort, respectively. In the training cohort, the percentages of misclassifications using the NFS alone, LSM alone, LSM alone (with grey zone), both tests for all patients and a 2-step approach using LSM only for patients with indeterminate and high NFS were 5.0, 28.7, 2.0, 2.0 and 4.0 %, respectively. The percentages of patients requiring liver biopsy were 30.7, 0, 36.6, 36.6 and 18.8 %, respectively. In the validation cohort, the percentages of misclassifications were 8.7, 28.3, 2.2, 2.2 and 8.7 %, respectively. The percentages of patients requiring liver biopsy were 28.3, 0, 41.3, 43.5 and 19.6 %, respectively.

    CONCLUSIONS: The novel 2-step approach further reduced the number of patients requiring a liver biopsy whilst maintaining the accuracy to predict advanced fibrosis. The combination of NFS and LSM for all patients provided no apparent advantage over using either of the tests alone.

    Matched MeSH terms: Prospective Studies
  7. Hunt EA, Cruz-Eng H, Bradshaw JH, Hodge M, Bortner T, Mulvey CL, et al.
    Resuscitation, 2015 Jan;86:1-5.
    PMID: 25457379 DOI: 10.1016/j.resuscitation.2014.10.007
    Observations of cardiopulmonary arrests (CPAs) reveal concerning patterns when clinicians identify a problem, (e.g. loss of pulse) but do not immediately initiate appropriate therapy (e.g. compressions) resulting in delays in life saving therapy.
    Matched MeSH terms: Prospective Studies
  8. Lim L, Ng TP, Ong AP, Tan MP, Cenina AR, Gao Q, et al.
    Alzheimers Res Ther, 2018 01 22;10(1):6.
    PMID: 29370825 DOI: 10.1186/s13195-017-0333-z
    BACKGROUND: Cognitive screeners are imperative for early diagnosis of dementia. The Visual Cognitive Assessment Test (VCAT) is a language-neutral, visual-based test which has proven useful for a multilingual population in a single-center study. However, its performance utility is unknown in a wider and more diverse Southeast Asian cohort.

    METHODS: We recruited 164 healthy controls (HC) and 120 cognitively impaired (CI) subjects- 47 mild cognitive impairment (MCI) and 73 mild Alzheimer's disease (AD) dementia participants, from four countries between January 2015 and August 2016 to determine the usefulness of a single version of the VCAT, without translation or adaptation, in a multinational, multilingual population. The VCAT was administered along with established cognitive evaluation.

    RESULTS: The VCAT, without local translation or adaptation, was effective in discriminating between HC and CI subjects (MCI and mild AD dementia). Mean (SD) VCAT scores for HC and CI subjects were 22.48 (3.50) and 14.17 (5.05) respectively. Areas under the curve for Montreal Cognitive Assessment (0.916, 95% CI 0.884-0.948) and the VCAT (0.905, 95% CI 0.870-0.940) in discriminating between HCs and CIs were comparable. The multiple languages used to administer VCAT in four countries did not significantly influence test scores.

    CONCLUSIONS: The VCAT without the need for language translation or cultural adaptation showed satisfactory discriminative ability and was effective in a multinational, multilingual Southeast Asian population.

    Matched MeSH terms: Prospective Studies
  9. Papadimitriou N, Muller D, van den Brandt PA, Geybels M, Patel CJ, Gunter MJ, et al.
    Eur J Nutr, 2020 Oct;59(7):2929-2937.
    PMID: 31705265 DOI: 10.1007/s00394-019-02132-z
    PURPOSE: The evidence from the literature regarding the association of dietary factors and risk of prostate cancer is inconclusive.

    METHODS: A nutrient-wide association study was conducted to systematically and comprehensively evaluate the associations between 92 foods or nutrients and risk of prostate cancer in the European Prospective Investigation into Cancer and Nutrition (EPIC). Cox proportional hazard regression models adjusted for total energy intake, smoking status, body mass index, physical activity, diabetes and education were used to estimate hazard ratios and 95% confidence intervals for standardized dietary intakes. As in genome-wide association studies, correction for multiple comparisons was applied using the false discovery rate (FDR 

    Matched MeSH terms: Prospective Studies
  10. Chew BH, Than TL, Chew KS, Jamaludin NK, Hassan H
    Med J Malaysia, 2012 Dec;67(6):571-6.
    PMID: 23770947 MyJurnal
    INTRODUCTION: Our study was to examine prevalence and treatment outcomes of medical emergencies at two urban public health clinics in the Petaling district, Selangor, Malaysia.
    METHODS: A prospective universal sampling was employed to recruit all emergencies over one month period (12 April to 11 May 2011). A structured case record form was used to capture demographic data, whether the index case was selfpresenting or decided by health care workers as a medical emergency, presenting complaints, diagnoses, concurrent chronic diseases and their treatment outcomes at the clinic level. Emergency presentations and diagnoses were classified according to the International Classification of Primary Care, revised second edition (ICPC-2-R).
    RESULTS: A total of 125 medical emergencies with 276 presenting complaints were recorded. The mean age was 30.7 years old (SD 19.9). The prevalence of medical emergency was 0.56% (125/22,320). Chief complaints were mainly from ICPC-2-R chapter R (respiratory system) and chapter A (general and unspecified), 40.0% and 28.0% respectively. The most common diagnosis was acute exacerbation of bronchial asthma (34.6%). Forty percent were referred to hospitals. After adjusting for age and gender, patients who presented with painful emergency (OR 4.9 95% CI 2.0 to 11.7), cardiovascular emergency (OR 63.4 95% CI 12.9 to 310.4) and non-respiratory emergency were predictors of hospital referral (OR 4.6 95% CI 1.1 to 19.1).
    CONCLUSION: There was about one medical emergency for every 200 patients presenting to these urban public polyclinics which were mainly acute asthma. More than half were discharged well and given a follow-up.
    Study site: Klinik Kesihatan Seri Kembangan and Klinik Kesihatan Puchong, Selangor, Malaysia
    Matched MeSH terms: Prospective Studies
  11. Jarmin, R., Othman, H., Zuhdi, Z., Mohamad, I.S., Ahmad, A.W., Ariffin, A.C.
    MyJurnal
    Background: Morbidity post hepatectomy still remain persistent throughout decades compared to other
    surgery. Modern approach have been introduced to improve safety and reduce morbidity whilst at the same
    time enhance patient recovery. Thus, enhanced recovery after surgery or fast track recovery program for
    liver resection was initiated.

    Objective: The aim of this study was to achieve discharge by postoperative
    day 3 for minor resection and day 5 for major resection.

    Design and Setting: This is a prospective study
    conducted in Hospital Universiti Kebangsaan Malaysia (HUKM) from September 2014 till April 2015.

    Material
    and Methods: All patients undergoing open liver resection were included in the study. They were then
    managed post operatively according to ERAS protocol that was drawn up based on previous studies. Patient’s
    demographics data, intra operative parameters, postoperative complications and adherence to
    postoperative recovery protocol were recorded.

    Results: Seventeen patients (7 major and 10 minor
    resection) were recruited. The mean length of hospital stay for minor resection was 5.9 and major resection
    was 9.6 .With regards to the targets, 4 out of 10 (40%)patients in minor resection group and 4 out 7 (57.1%)
    in the major group were discharged on time. 9 patients had postoperative complications with no mortality
    recorded. In terms of the ERAS protocol targets, the PCA morphine discontinuation target was achieved in
    15 patients (88.3%) ,nasogastric tube removal (13 patients -76.5%) , urinary cathether removal (6 patients -
    35.3%), abdominal drains removal (9 patients-52.9%) and resumption of full diet was achieved by 82.4% (14
    patients).

    Conclusion: From these overall achievement, most of our targets have been met and this shows
    that our ERAS protocol is safe to be applied to patient undergoing hepatectomy.

    Limitations: Some patients
    had achieved their target but not discharged for unknown reason.
    Matched MeSH terms: Prospective Studies
  12. C Thambiah S, Meor Anuar Shuhaili MFR, Chew BH, Samsudin IN, Abdul Rahman H, Stanslas J, et al.
    Biomarkers, 2019 Nov;24(7):659-665.
    PMID: 31342800 DOI: 10.1080/1354750X.2019.1648554
    Introduction: Statin, the first-line treatment for dyslipidaemia, may have suboptimal adherence due to its associated muscle adverse events. These data, however, remain limited. Aim: To determine the association of serum creatine kinase (CK) and SLCO1B1 rs4363657 polymorphism with statin-associated muscle adverse events (SAMAE) among dyslipidaemia participants.
    Methods: This was a prospective cohort study at government health clinics involving newly diagnosed adults with dyslipidaemia. SAMAE were recorded based on the patient's complaint after a month on statin. CK was taken at baseline and follow-up. Genetic profiling was performed for SLCO1B1 rs4363657 polymorphism.
    Results: Among 118 participants, majority were Malay (72%) males (61%) with a mean age of 49 ± 12.2 years old and prescribed lovastatin (61.9). There was a significant association between statin types (lovastatin and simvastatin) and SAMAE (p = 0.0327); no significant association noted between CK and SAMAE (p = 0.5637). The SLCO1B1 rs4363657 polymorphism was significantly associated SAMAE (p 
    Matched MeSH terms: Prospective Studies
  13. Zainul Rashid MR, Lim JF, Nawawi NH, Luqman M, Zolkeplai MF, Rangkuty HS, et al.
    Gynecol Endocrinol, 2014 Mar;30(3):217-20.
    PMID: 24552449 DOI: 10.3109/09513590.2013.860960
    Gestational hypertension (GH) remains one of the main causes of high maternal and perinatal morbidity and mortality worldwide with the highest incidence among primigravidae of about 10%-15%. However, it was noted that the incidence of GH in primigravidae who conceived following assisted reproductive technique (ART) or intrauterine insemination (IUI) supplemented with dydrogesterone during the first trimester was low.

    Study site: Obstetrics and Gynecology
    Department, Pusat Perubatan Universiti Kebangsaan Malaysia PPUKM
    Matched MeSH terms: Prospective Studies
  14. Teh CL, Cheong YK, Ling HN, Chan PL, Chan T, Ling GR
    Rheumatol Int, 2013 Apr;33(4):1079-82.
    PMID: 22101556 DOI: 10.1007/s00296-011-2245-8
    We performed a prospective study of all patients diagnosed with gout and who received treatment in Sarawak General Hospital from 1 July 2010 to 31 December 2010. There was a total of 138 patients in our study of which 92 (66.7%) were from the indigenous populations. They have a mean age of 56.5 ± 12.5 years with a mean duration of illness of 11.6 ± 8.7 years. The mean lag time between symptom onset to the diagnosis of gout was 2.8 ± 4.8 years and a mean lag time to appropriate treatment of gout of 8.8 ± 8.4 years. Sixty-six (47.8%) patients have family history of gout. The common complications of gout in our patients were tophi (47.1%), joint deformities (39.1%), kidney stones (16.7%), and uric acid nephropathy (0.7%). Hospitalization occurred in 93 (67.4%) patients. Gout is a serious medical problem in our centre. Gout affects middle-aged men, especially the indigenous populations. Almost half of our patients have a family history of gout and have tophi formations. Our gout patients have a significant delay in diagnosis and appropriate treatment, thus contributing to more complications and hospitalizations in our centre. There is an urgent need to educate both patients and healthcare workers on gout and its treatment to reduce the burden of chronic gout in Sarawak.
    Matched MeSH terms: Prospective Studies
  15. Doughty MJ
    Clin Exp Optom, 2014 May;97(3):256-63.
    PMID: 24405014 DOI: 10.1111/cxo.12127
    PURPOSE: The aim was to assess the morphology of the Asian corneal endothelium, particularly the index of polymegethism and its relationship to endothelial cell density assessments.
    METHODS: The central regions of the corneal endothelium of 72 healthy, normal weight, non-contact lens wearers were assessed by non-contact specular microscopy. There were six groups of persons, aged between 18 and 27 years, whose ethnic origins were self-reported as Asian (Mainland China, Hong Kong, India, Malaysia, Pakistan or other Asian groups). Single images including at least 100 contiguous cells were obtained from each subject and were processed by planimetry after manual border marking to minimise errors. Calculations were made of the coefficient of variation of cell area (COV; polymegethism) as well as the endothelial cell density and percentage of six-sided cells.
    RESULTS: The COV values ranged from 18 to 30.4 per cent (group mean 24.5 ± 2.8 per cent). The corneas had essentially normal thickness (0.530 ± 0.026 mm), with the endothelia showing a high percentage of six-sided cells (66.3 ± 7.1 per cent) and none showing even mild signs of polymegethism. Endothelial cell density estimates based on average cell areas ranged from 2,020 to 3,623 cells per mm(2) and from 2,157 to 3,835 with calculations based on individual cell areas. The difference between the two estimates of endothelial cell density was strongly related to the coefficient of variation (r = 0.765).
    CONCLUSIONS: This result is consistent with several older reports indicating that it is uncommon to find polymegethism in healthy young adult Asian individuals. Nonetheless, even low coefficient of variation values can substantially affect the estimations of the cell density.
    KEYWORDS: Asian; cornea; endothelium; human; polymegathism
    Matched MeSH terms: Prospective Studies
  16. Loke SC, Rahim KF, Kanesvaran R, Wong TW
    Med J Malaysia, 2010 Mar;65(1):3-6.
    PMID: 21265238 MyJurnal
    Muslim diabetics who fast during Ramadan are at risk of hypoglycaemia, and previous consensus guidelines have highlighted certain risk factors. This prospective cohort study aims to determine the relative risk (RR) of hypoglycaemia during Ramadan fasting compared with a non-fasting period of equivalent length, and to ascertain which risk factors are clinically significant. From the results, Ramadan fasting carries a RR of hypoglycaemia of 1.60 (95% CI 1.05 to 2.43). Good metabolic control (HbAlc < 8%) and old age (> 60 years) increased RR more than twice, while taking breakfast prior to fasting reduces RR to less than half.
    Matched MeSH terms: Prospective Studies
  17. Barber BE, William T, Grigg MJ, Menon J, Auburn S, Marfurt J, et al.
    Clin Infect Dis, 2013 Feb;56(3):383-97.
    PMID: 23087389 DOI: 10.1093/cid/cis902
    Plasmodium knowlesi commonly causes severe malaria in Malaysian Borneo, with high case-fatality rates reported. We compared risk, spectrum, and outcome of severe disease from P. knowlesi, Plasmodium falciparum, and Plasmodium vivax and outcomes following introduction of protocols for early referral and intravenous artesunate for all severe malaria.
    Matched MeSH terms: Prospective Studies
  18. Hamidon BB, Abdullah SA, Zawawi MF, Sukumar N, Aminuddin A, Raymond AA
    Med J Malaysia, 2006 Mar;61(1):59-66.
    PMID: 16708735 MyJurnal
    Dysphagia following stroke is common problem and is of particular concern because of its potental for malnutrition. Nasogastric (NG) and percutaneous endoscopic gastrostomy (PEG) tube feeding are recognized methods for nutritional support for patients with persistent neurologic dysphagia. However, the former is associated with tube dislodgement and blockage that might compromise the patients' nutritional status. There have been few randomized prospective studies to date comparing the efficacy and safety of these 2 modes of dysphagia management in stroke patients. The objective of this study was to compare PEG with NG tube feeding after acute dysphagic stroke in terms of nutritional status and treatment failure. This was a randomized prospective clinical trial. A total of 23 consecutive patients who fulfilled the criteria were recruited from the medical wards in Hospital Universiti Kebangsaan Malaysia. The diagnosis of stroke (acute cerebral infarct) was based on clinical and brain computed tomographic (CT scan) findings; and the diagnosis of dysphagia was done clinically by using the 'swallowing test'. At recruitment, upper-arm skin fold thickness (triceps and biceps) and mid-arm circumference were measured; and blood was drawn for serum albumin level. They were then followed up at 4 weeks where the above tests were repeated. A total of 22 patients completed the study (12 patients in the NG group and 10 patients in the PEG group). Serum albumin levels (p = 0.045) were significantly higher in the PEG as compared to the NG group at 4 weeks post-intervention. There were statistically significant improvements in serum albumin level (p = 0.024) in the PEG group; and statistically significant reductions in serum albumin level (p = 0.047) in the NG group 4 weeks after the intervention. However, there were no significant differences in anthropometric parameters between the two groups and no significant changes in these parameters for each group 4 weeks after the intervention. Treatment failure occurred in 5 out of 10 patients (50.0%) in the NG group, but none in PEG group (p = 0.036). PEG tube feeding is more effective than NG tube feeding in improving the nutritional status (in terms of the serum albumin level) of patients with dysphagic stroke. NG tube feeding, in fact, reduced the nutritional status (in terms of the serum albumin level) of the patients.
    Matched MeSH terms: Prospective Studies
  19. Hon SK, Izam TM, Koay CB, Razi A
    Med J Malaysia, 2001 Dec;56(4):463-70.
    PMID: 12014767
    The results of a prospective study of 94 patients with history of ear, nose or aerodigestive tract foreign bodies were analysed. Sixty six to 94% of patients presented within 24 hours to a primary care doctor, 80 to 94% was referred to the ENT Department within 24 hours and 89 to 93% of patients had their foreign bodies removed within 24 hours. Overall, 58% of aural foreign bodies, 67% nasal foreign bodies and 94% of aerodigestive tract foreign bodies were removed within 48 hours of insertion. As a result of the prompt removal of foreign bodies in the majority of patients, no significant complications occurred. Foreign bodies in the aerodigestive tract tend to present earlier and more promptly removed compared with ear and nose foreign bodies. There was a significantly higher proportion of foreign body in the right ear and nostril compared to the left.

    Study site: ENT Department, Hospital Kuala Lumpur
    Matched MeSH terms: Prospective Studies
  20. Chajès V, Assi N, Biessy C, Ferrari P, Rinaldi S, Slimani N, et al.
    Ann Oncol, 2017 Nov 01;28(11):2836-2842.
    PMID: 28950350 DOI: 10.1093/annonc/mdx482
    BACKGROUND: Intakes of specific fatty acids have been postulated to impact breast cancer risk but epidemiological data based on dietary questionnaires remain conflicting.

    MATERIALS AND METHODS: We assessed the association between plasma phospholipid fatty acids and breast cancer risk in a case-control study nested within the European Prospective Investigation into Cancer and Nutrition study. Sixty fatty acids were measured by gas chromatography in pre-diagnostic plasma phospholipids from 2982 incident breast cancer cases matched to 2982 controls. Conditional logistic regression models were used to estimate relative risk of breast cancer by fatty acid level. The false discovery rate (q values) was computed to control for multiple comparisons. Subgroup analyses were carried out by estrogen receptor (ER) and progesterone receptor expression in the tumours.

    RESULTS: A high level of palmitoleic acid [odds ratio (OR) for the highest quartile compared with the lowest OR (Q4-Q1) 1.37; 95% confidence interval (CI), 1.14-1.64; P for trend = 0.0001, q value = 0.004] as well as a high desaturation index (DI16) (16:1n-7/16:0) [OR (Q4-Q1), 1.28; 95% C, 1.07-1.54; P for trend = 0.002, q value = 0.037], as biomarkers of de novo lipogenesis, were significantly associated with increased risk of breast cancer. Levels of industrial trans-fatty acids were positively associated with ER-negative tumours [OR for the highest tertile compared with the lowest (T3-T1)=2.01; 95% CI, 1.03-3.90; P for trend = 0.047], whereas no association was found for ER-positive tumours (P-heterogeneity =0.01). No significant association was found between n-3 polyunsaturated fatty acids and breast cancer risk, overall or by hormonal receptor.

    CONCLUSION: These findings suggest that increased de novo lipogenesis, acting through increased synthesis of palmitoleic acid, could be a relevant metabolic pathway for breast tumourigenesis. Dietary trans-fatty acids derived from industrial processes may specifically increase ER-negative breast cancer risk.

    Matched MeSH terms: Prospective Studies
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