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Fulltext A bibliometric analysis of research productivity of Malaysian publications in leading toxicology journals during a 10-year period (2003-2012)

Zyoud Sh, Al-Jabi S, Sweileh W, Awang R

Hum Exp Toxicol, 2014 Dec;33(12):1284-93.
PMID: 24505047 DOI: 10.1177/0960327113514101

Toxicology in Malaysia has experienced rapid development and made great progress in education and research in conjunction with economic development in Malaysia over the past two decades.
Fulltext Assessing the scientific research productivity of a leading toxicology journal: A case study of Human & Experimental Toxicology from 2003 to 2012

Zyoud SH, Al-Jabi SW, Sweileh WM, Awang R

SAGE Open Med, 2014;2:2050312114523424.
PMID: 26770709 DOI: 10.1177/2050312114523424

BACKGROUND: Bibliometric studies are increasingly being used for research assessments. Bibliometric indicators involve the application of statistical methods to scientific publications to obtain the bibliographics for each journal. The main objective of this study was to conduct a bibliometric evaluation of Human & Experimental Toxicology retrieved from the Scopus database.
METHODS: This study obtained data from Scopus published from 1 January 2003 till 31 December 2012. The keywords entered in Scopus to accomplish the objective of this study were 'Human', 'Experimental' and 'Toxicology' as 'Source Title'. Research productivity was evaluated based on a methodology developed and used in other bibliometric studies by analysing (a) total and trends in Human & Experimental Toxicology contributions in research between 2003 and 2012; (b) Human & Experimental Toxicology authorship patterns and productivity; (c) collaboration patterns; and (d) the citations received by the publications.
RESULTS: There were 1229 research articles published in Human & Experimental Toxicology. Of the articles included, 947 (77.1%) were original articles and 104 (8.5%) were review articles. The Hirsch-index of the retrieved documents was 35. The largest number of publications in Human & Experimental Toxicology was from the United States (19.6%), followed by India (12.8%) and Turkey (10.9%). The total number of citations was 9119, with a median (interquartile range) of 3 (1-9) in 6797 documents. The highest median (interquartile range) number of citations was 8 (2.7-12.7) for France, followed by 7.5 (2-22.5) for Iran and 6 (3-13.5) for the United Kingdom. The country most often citing articles that were published in Human & Experimental Toxicology was the United States, which made citations in 1508 documents, followed by India with citations in 792 documents.
CONCLUSION: The documents in Human & Experimental Toxicology focus principally on original data, with very few review articles. Review articles tend to have higher citation rates than original articles, and hence, the editors and authors of Human & Experimental Toxicology might usefully promote the submission of reviews in the future to improve the impact of the journal.
KEYWORDS: Bibliometric; Scopus; citations; human and experimental toxicology
Health-related quality of life associated with treatment adherence in patients with hypertension: a cross-sectional study

Zyoud SH, Al-Jabi SW, Sweileh WM, Wildali AH, Saleem HM, Aysa HA, et al.

Int J Cardiol, 2013 Oct 3;168(3):2981-3.
PMID: 23647601 DOI: 10.1016/j.ijcard.2013.04.105
Reliability of the reported ingested dose of acetaminophen for predicting the risk of toxicity in acetaminophen overdose patients

Zyoud SH, Awang R, Sulaiman SA

Pharmacoepidemiol Drug Saf, 2012 Feb;21(2):207-13.
PMID: 21812068 DOI: 10.1002/pds.2218

The present study examines the relationship between the dose of acetaminophen reported to have been ingested by patients and the occurrence of serum acetaminophen levels above the 'possible toxicity' line in patients presenting at the hospital after acetaminophen overdose. The prognostic value of patient-reported dosage cut-offs of 8, 10 and 12 g was determined.
Impact of serum acetaminophen concentration on changes in serum potassium, creatinine and urea concentrations among patients with acetaminophen overdose

Zyoud SH, Awang R, Sulaiman SA, Al-Jabi SW

Pharmacoepidemiol Drug Saf, 2011 Feb;20(2):203-8.
PMID: 21254292 DOI: 10.1002/pds.2060

Acetaminophen overdose may be accompanied by electrolyte disturbances. The basis for electrolyte change appears to be due to increased fractional urinary electrolyte excretion.
A cross-sectional observation of the factors associated with deliberate self-poisoning with acetaminophen: impact of gender differences and psychiatric intervention

Zyoud SH, Awang R, Sulaiman SA, Al-Jabi SW

Hum Psychopharmacol, 2010 Aug;25(6):500-8.
PMID: 20737523 DOI: 10.1002/hup.1140

The objectives of this study were to determine the risk factors and life stressors that are prevalent among the acetaminophen deliberate self-poisoning (DSP) cases, to identify gender differences in the associated factors, and to determine the prevalence of psychiatric diagnosis and the patterns and types of psychotherapeutic interventions provided by psychiatrists.
Fulltext Assessing the impact of vomiting episodes on outcome after acetaminophen poisoning

Zyoud SH, Awang R, Sulaiman SA, Al-Jabi SW

Basic Clin Pharmacol Toxicol, 2010 Nov;107(5):887-92.
PMID: 20456332 DOI: 10.1111/j.1742-7843.2010.00594.x

Identifying indices of poor prognosis at first presentation after acetaminophen poisoning is the key to both improving clinical care and determining targets for intervention. This study intended to document the prevalence, clinical characteristics and predictors of vomiting and to investigate the relationship between episodes of vomiting at first hospital presentation and outcome in acetaminophen poisoning. This retrospective cohort study included patients who attended the emergency department and were admitted within 24 hr of acetaminophen ingestion. The study was conducted over a period of 5 years from 1 January 2004 to 31 December 2008. Parametric and non-parametric tests were used to test differences between groups depending on the normality of the data. SPSS 15 was used for data analysis. Data from 291 patients were included. Vomiting was present in 65.3% of patients with acetaminophen poisoning at the time of first presentation. Multiple logistic regression showed that significant risk factors for vomiting were present among patients who reported an ingested dose of acetaminophen ≥10 g (p < 0.001) and a latency time of more than 8 hr (p = 0.030). Overall, an increasing trend in prothrombin time (p = 0.03), serum bilirubin (p < 0.001), serum creatinine (p = 0.005), serum potassium (p < 0.001), length of hospital stay (p < 0.001) and the prevalence of patients who had a serum acetaminophen level above a 'possible toxicity' treatment line (p = 0.001) were associated with an increased number of episodes of vomiting. In conclusion, vomiting was common among patients with acetaminophen poisoning. This study suggests that an increase in episodes of vomiting at first presentation appears to be an important risk marker of subsequent nephrotoxicity and hepatotoxicity.
Fulltext Relationship between serum acetaminophen concentration and N-acetylcysteine-induced adverse drug reactions

Zyoud SH, Awang R, Sulaiman SA, Khan HR, Sawalha AF, Sweileh WM, et al.

Basic Clin Pharmacol Toxicol, 2010 Sep;107(3):718-23.
PMID: 20374238 DOI: 10.1111/j.1742-7843.2010.00567.x

Intravenous N-acetylcysteine is usually regarded as a safe antidote. However, during the infusion of the loading dose, different types of adverse drug reactions (ADR) may occur. The objective of this study was to investigate the relation between the incidence of different types of ADR and serum acetaminophen concentration in patients presenting to the hospital with acetaminophen overdose. This is a retrospective study of patients admitted to the hospital for acute acetaminophen overdose over a period of 5 years (1 January 2004 to 31 December 2008). Parametric and non-parametric tests were used to test differences between groups depending on the normality of the data. SPSS 15 was used for data analysis. Of 305 patients with acetaminophen overdose, 146 (47.9%) were treated with intravenous N-acetylcysteine and 139 (45.6%) were included in this study. Different types of ADR were observed in 94 (67.6%) patients. Low serum acetaminophen concentrations were significantly associated with cutaneous anaphylactoid reactions but not other types of ADR. Low serum acetaminophen concentration was significantly associated with flushing (p < 0.001), rash (p < 0.001) and pruritus (p < 0.001). However, there were no significant differences in serum acetaminophen concentrations between patients with and without the following ADR: gastrointestinal reactions (p = 0.77), respiratory reactions (p = 0.96), central nervous reactions (p = 0.82) and cardiovascular reactions (p = 0.37). In conclusion, low serum acetaminophen concentrations were associated with higher cutaneous anaphylactoid reactions. Such high serum acetaminophen concentrations may be protective against N-acetylcysteine-induced cutaneous ADR.
An analysis of the length of hospital stay after acetaminophen overdose

Zyoud SH, Awang R, Sulaiman SA, Al-Jabi SW

Hum Exp Toxicol, 2011 Jul;30(7):550-9.
PMID: 20630911 DOI: 10.1177/0960327110377647

Acetaminophen is one of the most commonly encountered medications in self-poisoning, with a high rate of morbidity. The prevalence and characteristics of acetaminophen intoxication associated with long hospital stay in patients are not well defined.
Effects of delay in infusion of N-acetylcysteine on appearance of adverse drug reactions after acetaminophen overdose: a retrospective study

Zyoud SH, Awang R, Sulaiman SA, Al-Jabi SW

Pharmacoepidemiol Drug Saf, 2010 Oct;19(10):1064-70.
PMID: 20712021 DOI: 10.1002/pds.1955

To investigate the relationship between different types of adverse drug reaction (ADR) and late time to N-acetylcysteine (NAC) infusion in patients presenting to the hospital with acetaminophen overdose.
N-acetylcysteine-induced headache in hospitalized patients with acute acetaminophen overdose

Zyoud SH, Awang R, Sulaiman SA, Al-Jabi SW

Fundam Clin Pharmacol, 2011 Jun;25(3):405-10.
PMID: 20584210 DOI: 10.1111/j.1472-8206.2010.00831.x

Intravenous N-acetylcysteine (IV-NAC) is usually regarded as a safe antidote to acetaminophen overdose. However, during infusion of the loading dose, adverse drug reactions such as a headache may occur. The objectives of this study were to investigate the prevalence of headache in patients presenting to hospital after acetaminophen overdose and to determine which clinical findings are most predictive of headache among these patients. This is a retrospective cohort study of hospital admissions for acute acetaminophen overdose that was conducted over a period of 4 years from January 1, 2005 to December 31, 2008. Demographic data, clinical characteristics, and predictors of headache were analyzed. spss 15 was used for data analysis. Two-hundred and fifty-five patients were studied; their mean age was 23.1 ± 1.6; 83.9% of them were women and 14.9% had a headache during hospitalization. Headache among patients was significantly associated with IV-NAC administration (P = 0.001), intentional ingestion of drug (P = 0.04), acetaminophen concentration above 'possible toxicity' treatment line (P = 0.04), a high acetaminophen concentration (P = 0.04), and a long hospital stay (P = 0.03). Multiple logistic regression showed a significant risk factor for headache in patients administered IV-NAC (P = 0.04). We recorded a high frequency of headache in patients with acute acetaminophen overdose in our geographical area. This study suggests that among those patients, the use of IV-NAC is associated with an increased risk of headache.
High prevalence of hypokalemia after acute acetaminophen overdose: impact of psychiatric illness

Zyoud SH, Awang R, Syed Sulaiman SA, Al-jabi SW

Hum Exp Toxicol, 2010 Sep;29(9):773-8.
PMID: 20144962 DOI: 10.1177/0960327110361759

Hypokalemia is not an isolated disease but an associated finding in a number of different diseases. It is also a commonly neglected condition among patients with acute acetaminophen overdose.
Association between gastrointestinal manifestations following acetaminophen poisoning and outcome in 291 acetaminophen poisoning patients

Zyoud SH, Awang R, Sulaiman SA, Al-Jabi SW

Pharmacoepidemiol Drug Saf, 2010 May;19(5):511-7.
PMID: 20333776 DOI: 10.1002/pds.1940

Acetaminophen poisoning is a common clinical problem, and early identification of patients with more severe poisoning is key to improving outcomes.
Incidence of adverse drug reactions induced by N-acetylcysteine in patients with acetaminophen overdose

Zyoud SH, Awang R, Syed Sulaiman SA, Sweileh WM, Al-Jabi SW

Hum Exp Toxicol, 2010 Mar;29(3):153-60.
PMID: 20071472 DOI: 10.1177/0960327109359642

Intravenous N-acetylcysteine (IV-NAC) is widely recognized as the antidote of choice for acetaminophen overdose. However, its use is not without adverse drug reactions (ADR) that might affect therapeutic outcome or lead to treatment delay.
Global research productivity of N-acetylcysteine use in paracetamol overdose: A bibliometric analysis (1976-2012)

Zyoud SH, Al-Jabi SW, Sweileh WM, Awang R, Waring WS

Hum Exp Toxicol, 2015 Oct;34(10):1006-16.
PMID: 26429951 DOI: 10.1177/0960327114565494

PURPOSE: The main objective of this study was to examine the publication pattern of N-acetylcysteine (NAC) research output for paracetamol overdose at the global level.
METHODS: Data were searched for documents that contained specific words regarding NAC and paracetamol as keywords in the title and/or abstract and/or keywords. Scientific output was evaluated based on a methodology developed and used in other bibliometric studies. Research productivity was adjusted to the national population and nominal gross domestic product per capita.
RESULTS: The criteria were met by 367 publications from 33 countries. The highest number of articles associated with the use of NAC in paracetamol overdose was from the United States of America (USA; 39.78%), followed by the United Kingdom (UK; 11.99%). After adjusting for economy and population power, USA (2.822), Iran (1.784) and UK (1.125) had the highest research productivity. The total number of citations at the time of data analysis (14 March 2014) was 8785 with an average of 23.9 citations per document and a median (interquartile range) of 6 (1-22). The h-index of the retrieved documents was 48. The highest h-index was 32 for USA, followed by 20 for UK. Furthermore, the highest number of collaborations with international authors for each country was held by USA with 11 countries, followed by Canada with 7 countries.
CONCLUSION: The amount of NAC-based research activity was low in some countries, and more effort is needed to bridge this gap and to promote better evaluation of NAC use worldwide. Our findings demonstrate that NAC use for paracetamol overdose remains a hot issue in scientific research and may have a larger audience compared with other toxicological aspects. Editors and authors in the field of toxicology might usefully promote the submission of work on NAC in future to improve their journal's impact.
KEYWORDS: Bibliometric; NAC; Scopus; acetaminophen; acetylcysteine; citations; paracetamol; poisoning
Fulltext Parental knowledge, attitudes and practices regarding antibiotic use for acute upper respiratory tract infections in children: a cross-sectional study in Palestine

Zyoud SH, Abu Taha A, Araj KF, Abahri IA, Sawalha AF, Sweileh WM, et al.

BMC Pediatr, 2015;15:176.
PMID: 26561029 DOI: 10.1186/s12887-015-0494-5

BACKGROUND: In primary health care centres, upper respiratory tract infections (URTIs) in children are commonly encountered by physicians. Viruses cause most URTIs, but parents' attitudes often represent an important reason for antibiotic abuse, which leads to the development and spread of antimicrobial resistance. The goal of this study was to examine parents' knowledge, attitudes, and practices (KAP) about antibiotic use for children with URTIs in Palestine.
METHODS: A cross-sectional study was performed in primary health care centres in Nablus city from 1 June to 31 October 2012. A questionnaire was developed and administered to determine parents' KAP regarding antibiotic use for their children with URTIs.
RESULTS: Three hundred and eighty-five parents completed the questionnaire. A total of 79.7% of the parents were attentive to the truth that antibiotic misuse is responsible for bacterial resistance. Only 18.9% of parents thought that antibiotics did not have any harmful side effects. Fifty nine per cent of parents did not agree that URTIs are mostly viral in origin and are self-limited. Almost 73% of parents choose antibiotics as a treatment for URTIs, while earache (68%) and fever (64%) were the most common reasons for which parents expected antibiotics. However, more than 38% of the parents never asked the paediatrician to prescribe antibiotics, and only 6% congratulated their paediatricians for not prescribing antibiotics.
CONCLUSIONS: Although there is a trusted relationship between parents and paediatricians, Palestinian parents have insufficient knowledge related to antibiotic use for URTIs in children, which results in inappropriate attitudes and practices. Educational interventions for both parents and physicians will reduce unnecessary antibiotic use and resistance.
Intravenous Lipid Emulsion as an Antidote for the Treatment of Acute Poisoning: A Bibliometric Analysis of Human and Animal Studies

Zyoud SH, Waring WS, Al-Jabi SW, Sweileh WM, Rahhal B, Awang R

Basic Clin Pharmacol Toxicol, 2016 Nov;119(5):512-519.
PMID: 27098056 DOI: 10.1111/bcpt.12609

In recent years, there has been increasing interest in the role of intravenous lipid formulations as potential antidotes in patients with severe cardiotoxicity caused by drug toxicity. The aim of this study was to conduct a comprehensive bibliometric analysis of all human and animal studies featuring lipid emulsion as an antidote for the treatment of acute poisoning. The Scopus database search was performed on 5 February 2016 to analyse the research output related to intravenous lipid emulsion as an antidote for the treatment of acute poisoning. Research indicators used for analysis included total number of articles, date (year) of publication, total citations, value of the h-index, document types, countries of publication, journal names, collaboration patterns and institutions. A total of 594 articles were retrieved from Scopus database for the period of 1955-2015. The percentage share of global intravenous lipid emulsion research output showed that research output was 85.86% in 2006-2015 with yearly average growth in this field of 51 articles per year. The USA, United Kingdom (UK), France, Canada, New Zealand, Germany, Australia, China, Turkey and Japan accounted for 449 (75.6%) of all the publications. The total number of citations for all documents was 9,333, with an average of 15.7 citations per document. The h-index of the retrieved documents for lipid emulsion research as antidote for the treatment of acute poisoning was 49. The USA and the UK achieved the highest h-indices, 34 and 14, respectively. New Zealand produced the greatest number of documents with international collaboration (51.9%) followed by Australia (50%) and Canada (41.4%) out of the total number of publications for each country. In summary, we found an increase in the number of publications in the field of lipid emulsion after 2006. The results of this study demonstrate that the majority of publications in the field of lipid emulsion were published by high-income countries. Researchers from institutions in the USA led scientific production on lipid emulsion research. There is an obvious need to promote a deeper engagement through international collaborative research projects and funding mechanisms.
Fulltext Factors affecting quality of life in patients on haemodialysis: a cross-sectional study from Palestine

Zyoud SH, Daraghmeh DN, Mezyed DO, Khdeir RL, Sawafta MN, Ayaseh NA, et al.

BMC Nephrol, 2016 04 27;17(1):44.
PMID: 27117687 DOI: 10.1186/s12882-016-0257-z

BACKGROUND: Haemodialysis (HD) is a life-sustaining treatment for patients with end-stage renal disease (ESRD). HD can bring about significant impairment in health-related quality of life (HRQOL) and outcomes. Therefore, we sought to describe the patterns of HRQOL and determine the independent factors associated with poor HRQOL in Palestinian patients on HD.
METHODS: A multicenter cross-sectional study was performed from June 2014 to January 2015 using the EuroQOL-5 Dimensions instrument (EQ-5D-5L) for the assessment of HRQOL. ESRD patients undergoing HD in all dialysis centres in the West Bank of Palestine were approached and recruited for this study. Multiple linear regression was carried out to identify factors that were significantly associated with HRQOL.
RESULTS: Two hundred and sixty-seven patients were participated in the current study giving response rate of 96 %. Overall, 139 (52.1 %) were male, and the mean ± standard deviation age was 53.3 ± 16.2 years. The reported HRQOL as measured by mean EQ-5D-5L index value and Euro QOL visual analogue scale (EQ-VAS) score was 0.37 ± 0.44 and 59.38 ± 45.39, respectively. There was a moderate positive correlation between the EQ-VAS and the EQ-5D-5L index value (r = 0.42, p
Fulltext Bibliometric profile of the global scientific research on methanol poisoning (1902-2012)

Zyoud SH, Al-Jabi SW, Sweileh WM, Awang R, Waring WS

J Occup Med Toxicol, 2015;10:17.
PMID: 25949270 DOI: 10.1186/s12995-015-0062-9

BACKGROUND: Methanol poisoning is on the rise and has been associated with high morbidity and mortality; it has resulted in growing research in the field of toxicology. The aim of this study was to reveal underlying patterns in scientific outputs related to methanol poisoning at the global level by evaluating different bibliometric indices.
METHODS: We searched for publications that contained specific words regarding methanol poisoning in Scopus database.
RESULTS: A total of 912 articles, with 8,317 citations and with an average of 9.1 citations per document, were retrieved on methanol poisoning, and the bulk of the articles were published from the USA (20.9%), followed by Spain (4.4%), Canada (4.3%), India (3.1%), and France (3.0%). The articles were published belonging to 57 countries. No data related to methanol poisoning were published from 155 (73.1%) out of 212 countries. Twenty-one documents (2.3%) were published in Clinical Toxicology, whereas 18 (2.0%) were published in The Lancet.
CONCLUSIONS: Scientific production related to methanol poisoning is increasing. articles have been published in a wide range of journals with a variety of subject areas, most notably clinical toxicology; and the country with the greatest production was the USA.
Fulltext Use of complementary and alternative medicines in haemodialysis patients: a cross-sectional study from Palestine

Zyoud SH, Al-Jabi SW, Sweileh WM, Tabeeb GH, Ayaseh NA, Sawafta MN, et al.

BMC Complement Altern Med, 2016 Jul 11;16:204.
PMID: 27400742 DOI: 10.1186/s12906-016-1196-8

Complementary and alternative medicine (CAM), and herbal therapies, are accepted worldwide, and have been important from medical, sociological and economic perspectives, among haemodialysis (HD) patients. The primary aim of this study was to evaluate the use of CAM among patients with end-stage renal disease (ESRD) who are undergoing HD.

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