Center for Population Health science

Edinburgh, United Kingdom

Center for Population Health science

Edinburgh, United Kingdom
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Tsai C.-F.,Fu Jen Catholic University | Jeng J.-S.,National Taiwan University Hospital | Anderson N.,Center for Population Health science | Sudlow C.L.M.,University of Edinburgh
Neuroepidemiology | Year: 2017

Background: Chinese populations have a higher stroke incidence, a higher proportion of intracerebral hemorrhage (ICH), and a lower proportion of ischemic stroke (IS) as compared with white populations. The reasons are not fully understood. Methods: To evaluate the differences of major risk factors between ICH and IS in Chinese stroke patients, we analysed acute ICH and IS patients consecutively recruited in National Taiwan University Hospital Stroke Registry from 2006 to 2011. We used multiple logistic regression models to examine the associations of risk factors with ICH vs. IS. Also, we conducted subgroup analyses when a strongly significant interaction was detected. Results: We included a total of 1,373 ICH and 4,953 IS patients. ICH patients were younger than IS patients (mean age 61 vs. 68 years, p < 0.001), but there was no significant difference in gender (males 62 vs. 59%, p = 0.064). A logistic regression model adjusted for age, gender, and other major risk factors showed that both hypertension (OR 2.23, 95% CI 1.74-2.87) and alcohol intake (OR 1.44, 95% CI 1.16-1.77) had significantly stronger associations with ICH than IS, whereas diabetes, atrial fibrillation, ischemic heart disease, hyperlipidemia, smoking, and transient ischemic attack were less associated with ICH than IS. In subgroup analyses, the association of hypertension with ICH vs. IS was more marked in younger patients. Conclusion: Hypertension and alcohol intake are more strongly associated with ICH than IS in Chinese stroke patients, especially in younger patients. © 2017 S. Karger AG, Basel.

Willetts S.J.,Chalmers Sexual Health Clinic | MacDougall M.,Center for Population Health science | Cameron S.T.,Chalmers Sexual Health Clinic
Contraception | Year: 2016

Objective: The objective was to determine the acceptability to women of oral emergency contraception (EC) that works by inhibiting ovulation, preventing implantation or disrupting implantation, and also to determine the characteristics of women associated with the acceptability of each posited mechanism of action. Study design: Women completed a self-administered, anonymous questionnaire asking whether they would consider using an EC pill based on each of three hypothetical mechanisms of action: inhibiting ovulation, preventing implantation or disrupting implantation. The questionnaire was distributed among women in Edinburgh, UK, (a) presenting for EC at a community pharmacy, (b) attending a clinic for insertion of intrauterine contraception (IUC) or (c) attending a clinic for an induced abortion. Descriptive analyses stratified women according to healthcare setting and personal characteristics. Univariable and multivariable analyses were used to establish factors which may predict acceptability of each EC pill's mechanism of action. Results: Four hundred and nineteen out of 458 (91%) women responded to the survey. Overall, women reported that EC would be acceptable if it worked by inhibiting ovulation (89%), preventing implantation (83%) or disrupting implantation (75%). Among women seeking abortion, more would accept an EC pill which disrupted implantation compared to women seeking IUC (odds ratio, 2.19; 95% confidence interval, 1.30-3.69; p=.004). Based on multivariable analyses, factors associated with acceptability included previous use of EC, previously holding strong views against abortion and having had a previous abortion. Conclusion: For each of the posited mechanisms of action, a majority of women surveyed would be willing to consider oral EC to prevent unintended pregnancy. Implications statement: The scope of the study was limited, and further work on the views of women in the wider population is needed. This is important as the development of such drugs to prevent pregnancy is likely to raise political and ethical challenges, particularly in relation to disruption of implantation. © 2017 Elsevier Inc.

Pinnock H.,University of Edinburgh | Hanley J.,Napier University | McCloughan L.,EHealth Research Group | Todd A.,EHealth Research Group | And 9 more authors.
BMJ (Online) | Year: 2013

Objective: To test the effectiveness of telemonitoring integrated into existing clinical services such that intervention and control groups have access to the same clinical care. Design: Researcher blind, multicentre, randomised controlled trial. Setting: UK primary care (Lothian, Scotland). Participants: Adults with at least one admission for chronic obstructive pulmonary disease (COPD) in the year before randomisation. We excluded people who had other significant lung disease, who were unable to provide informed consent or complete the study, or who had other significant social or clinical problems. Interventions: Participants were recruited between 21 May 2009 and 28 March 2011, and centrally randomised to receive telemonitoring or conventional self monitoring. Using a touch screen, telemonitoring participants recorded a daily questionnaire about symptoms and treatment use, and monitored oxygen saturation using linked instruments. Algorithms, based on the symptom score, generated alerts if readings were omitted or breached thresholds. Both groups received similar care from existing clinical services. Main outcome measures: The primary outcome was time to hospital admission due to COPD exacerbation up to one year after randomisation. Other outcomes included number and duration of admissions, and validated questionnaire assessments of health related quality of life (using St George's respiratory questionnaire (SGRQ)), anxiety or depression (or both), self efficacy, knowledge, and adherence to treatment. Analysis was intention to treat. Results: Of 256 patients completing the study, 128 patients were randomised to telemonitoring and 128 to usual care; baseline characteristics of each group were similar. The number of days to admission did not differ significantly between groups (adjusted hazard ratio 0.98, 95% confidence interval 0.66 to 1.44). Over one year, the mean number of COPD admissions was similar in both groups (telemonitoring 1.2 admissions per person (standard deviation 1.9) v control 1.1 (1.6); P=0.59). Mean duration of COPD admissions over one year was also similar between groups (9.5 days per person (standard deviation 19.1) v 8.8 days (15.9); P=0.88). The intervention had no significant effect on SGRQ scores between groups (68.2 (standard deviation 16.3) v 67.3 (17.3); adjusted mean difference 1.39 (95% confidence interval -1.57 to 4.35)), or on other questionnaire outcomes. Conclusions In participants with a history of admission for exacerbations of COPD, telemonitoring was not effective in postponing admissions and did not improve quality of life. The positive effect of telemonitoring seen in previous trials could be due to enhancement of the underpinning clinical service rather than the telemonitoring communication. Trial registration ISRCTN96634935.

Sung K.-C.,Sungkyunkwan University | Ryu S.,Sungkyunkwan University | Lee J.-Y.,Sungkyunkwan University | Kim J.-Y.,Yonsei University | And 2 more authors.
Journal of Hepatology | Year: 2016

Background & Aims Guidelines about recommendations for amounts of exercise/physical activity are variable in non-alcoholic fatty liver disease. Our aim was to determine the amount of exercise that was associated with two outcomes: a) development of incident liver fat and b) resolution of baseline liver fat, at five-year follow-up. Methods In an occupational health screening program, weekly frequency of exercise was assessed using the validated Korean version of the International Physical Activity Questionnaire Short Form (IPAQ-SF). Liver fat was identified by ultrasonography (3.5 MHz probe) at baseline and at five-year follow-up. Fully adjusted Cox proportional hazards models were used to estimate hazard ratios (HRs and 95% confidence intervals [CI]) for incident fatty liver and resolution of fatty liver at follow-up. Results 233,676 men and women were studied between 2002 and 2014. 126,811 individuals were identified without fatty liver, and of these subjects, 29,014 subjects developed incident fatty liver during follow-up. At baseline, there were 42,536 individuals with liver fat and of these individuals, fatty liver resolved in 14,514, during follow-up. After full adjustment, compared to no exercise, exercise was associated with benefit for both outcomes; for exercise ⩾5 times per week for incident fatty liver: HR 0.86 (95% CI 0.80,0.92), p <0.001, and for resolution of fatty liver HR 1.40 (95% CI 1.25,1.55), p <0.001. Conclusions Moderate to vigorous exercise is beneficial in decreasing risk of development of new fatty liver or improving resolution of existing fatty liver during 5 years of follow-up. Lay summary The amount of exercise/physical activity to benefit fatty liver disease in non-alcoholic fatty liver disease is not known. In a large study of free-living people, our aim was to determine the amount of exercise that was linked with a decrease in new fatty liver and also improvement of existing fatty liver over 5 years of follow-up. Compared to no exercise, exercise ⩾5 times per week (lasting at least 10 min on each occasion) was linked to a highly significantly benefit for both a decrease in new fatty liver and also improvement of existing fatty liver. © 2016 European Association for the Study of the Liver

Storey D.J.,University of Edinburgh | Storey D.J.,Western General Hospital | Mclaren D.B.,Western General Hospital | Atkinson M.A.,Western General Hospital | And 5 more authors.
Annals of Oncology | Year: 2012

Background: Little is known about the prevalence and associations of clinically relevant fatigue (CRF) in recurrence-free prostate cancer survivors.Patients and methods: Four hundred and sixteen recurrence-free prostate cancer survivors who were >1 year post-radiotherapy or radical prostatectomy were surveyed. The prevalence of CRF (defined as Brief Fatigue Inventory >3) was determined and compared with a noncancer control group. Other measures included the Hospital Anxiety and Depression Scale, International Prostate Symptom Score, European Organization for Research and Treatment of Cancer Quality of Life Questionnaire. Relationships between these factors and CRF were explored in univariate and multivariate analyses.Results: Analyzable data were obtained from 91% (377/416) of patients. The prevalence of CRF was 29% (108/377) versus 16% (10/63) in the controls (P = 0.031). CRF was more common in post-radiotherapy than in post-prostatectomy 33% (79/240) versus 22% (29/133), P = 0.024. However, when other factors (current depression, anxiety, urinary symptoms, medical comorbidities, pain and insomnia) were controlled for, previous treatment did not predict CRF. Current depression [Hospital Anxiety and Depression Scale ≥8 was by far the strongest association [odds ratio 9.9, 95% confidence interval 4.2-23.5)].Conclusions: Almost one-third of recurrence-free prostate cancer survivors report CRF. Depression, anxiety, urinary symptoms, pain and insomnia measured at outcome are more strongly associated than type of cancer treatment previously received. © The Author 2011. Published by Oxford University Press on behalf of the European Society for Medical Oncology. All rights reserved.

Feinkohl I.,Center for Population Health science | Price J.F.,Center for Population Health science | Strachan M.W.J.,Western General Hospital | Frier B.M.,Queens Medical Research Institute
Alzheimer's Research and Therapy | Year: 2015

Older people with type 2 diabetes are at increased risk of developing cognitive impairment, for which several potential risk factors have been proposed. The present article reviews evidence in people with type 2 diabetes for associations of cognitive impairment with a range of vascular, metabolic, and psychosocial risk factors, many of which have a higher prevalence in people with type 2 diabetes than in non-diabetic adults of a similar age. Definitive research studies in this field are few in number. The risk factors may be involved in causal pathways or may act as useful markers of cerebrovascular damage (or both), and for which relatively consistent evidence is available, include poor glycemic control, hypoglycemia, microvascular disease, inflammation, and depression. For macrovascular disease, the strength of the association with cognitive impairment appears to depend on which vascular system has been examined. A role for pre-morbid ability in young adulthood as influencing the risk of both diabetes and cognitive impairment has also been suggested. The importance of considering inter-relationships between risk factors when investigating their potential contribution to cognitive impairment in future investigations is discussed. © 2015 Feinkohl et al.

Nahhas M.,University of Edinburgh | Bhopal R.,Center for Population Health science | Anandan C.,University of Edinburgh | Elton R.,University of Edinburgh | And 2 more authors.
npj Primary Care Respiratory Medicine | Year: 2014

BACKGROUND: Previous studies have demonstrated an association between obesity and asthma, but there remains considerable uncertainty about whether this reflects an underlying causal relationship. AIMS: To investigate the association between obesity and asthma in pre-pubertal children and to investigate the roles of airway obstruction and atopy as possible causal mechanisms. METHODS: We conducted an age- and sex-matched case-control study of 1,264 6- to 8-year-old schoolchildren with and without asthma recruited from 37 randomly selected schools in Madinah, Saudi Arabia. The body mass index (BMI), waist circumference and skin fold thickness of the 632 children with asthma were compared with those of the 632 control children without asthma. Associations between obesity and asthma, adjusted for other potential risk factors, were assessed separately in boys and girls using conditional logistic regression analysis. The possible mediating roles of atopy and airway obstruction were studied by investigating the impact of incorporating data on sensitisation to common aeroallergens and measurements of lung function. RESULTS: BMI was associated with asthma in boys (odds ratio (OR) = 1.14, 95% confidence interval (CI), 1.08-1.20; adjusted OR = 1.11, 95% CI, 1.03-1.19) and girls (OR = 1.37, 95% CI, 1.26-1.50; adjusted OR = 1.38, 95% CI, 1.23-1.56). Adjusting for forced expiratory volume in 1 s had a negligible impact on these associations, but these were attenuated following adjustment for allergic sensitisation, particularly in girls (girls: OR = 1.25; 95% CI, 0.96-1.60; boys: OR = 1.09, 95% CI, 0.99-1.19). CONCLUSIONS: BMI is associated with asthma in pre-pubertal Saudi boys and girls; this effect does not appear to be mediated through respiratory obstruction, but in girls this may at least partially be mediated through increased risk of allergic sensitisation. © 2014 Primary Care Respiratory Society/Macmillan Publishers Limited.

Henderson P.,University of Edinburgh | Henderson P.,Royal Hospital for Sick Children | Anderson N.H.,Center for Population Health science | Wilson D.C.,University of Edinburgh | Wilson D.C.,Royal Hospital for Sick Children
American Journal of Gastroenterology | Year: 2014

Objectives: Fecal calprotectin (FC) is increasingly used during the diagnosis of inflammatory bowel disease (IBD), outperforming blood markers during investigation in children. Tests that reduce endoscopy rates in children with suspected gut inflammation would be beneficial. We aimed to determine the usefulness of FC in children undergoing their primary investigation for suspected IBD by systematic review and meta-analysis. Methods: An electronic search was performed with keywords relating to IBD and calprotectin in multiple electronic resources from 1946 to May 2012; a hand search was also performed. Inclusion criteria were studies that reported FC levels before the endoscopic investigation of IBD in patients less than 18 years old. Studies were evaluated using the Quality Assessment of Diagnostic Accuracy Studies tool, and a meta-analysis was performed using a hierarchical summary receiver operating curve model. Results: Eight papers met the inclusion criteria (six prospective and two retrospective case-control studies); methodological quality was determined in detail for each study. The 8 studies presented FC levels at presentation in 715 patients, 394 pediatric IBD patients, and 321 non-IBD controls. Pooled sensitivity and specificity for the diagnostic utility of FC during the investigation of suspected pediatric IBD were 0.978 (95% confidence interval (CI), 0.947-0.996) and 0.682 (95% CI, 0.502-0.863), respectively; the positive and negative likelihood ratios were 3.07 and 0.03, respectively. Conclusions: FC has a high sensitivity and a modest specificity during the diagnosis of suspected pediatric IBD. Further work is required to determine the effect of FC levels on endoscopy rates and its role during the re-evaluation of those with confirmed disease. © 2014 by the American College of Gastroenterology.

Aitken M.,Center for Population Health science
Environmental Politics | Year: 2012

Climate change has come to hold a central position within many policy arenas. However, a particular framing of climate change and climate science, underpinned by modernist assumptions, dominates policy discourse. This leads to restricted policy responses reflecting particular interests and socio-political imaginaries. There is little public debate concerning this framing or the assumptions underpinning approaches to climate policy. The implications of this are illustrated by considering the ways in which UK planning policy has adapted to reflect commitments to mitigate climate change. It is shown that the importance attributed to climate change mitigation has had negative impacts on democratic involvement in planning processes. Given the uncertainty and high stakes of climate science (typical of post-normal science), value may be gained by incorporating the views and perspectives of 'extended peer communities', to question not only the processes and findings of climate science but also the ways in which the science is interpreted and responded to through policy. © 2012 Copyright Taylor and Francis Group, LLC.

PubMed | Center for Population Health science
Type: | Journal: Asian Pacific journal of cancer prevention : APJCP | Year: 2016

Printing of pictorial health warnings (PHWs) on cigarette packages became obligatory by the Vietnam Law on Prevention and Control of Tobacco Harm in May 2013. Literature from high-income countries suggests that PHWs motivate smokers to quit smoking although their long-term effects have been questioned due to reduction of impact over time. This study aimed to assess the salience of PHWs and smokers reactions towards PHWs over time. In May 2014 and May 2015, a cross-sectional questionnaire-based household survey was administered to respectively 1,462 and 1,509 Vietnamese male smokers aged 18 to 35. The result showed that salience of the PHWs 2 years after the implementation was higher than at the point of 1 year after the implementation. The proportion of respondents who tried to avoid noting the PHWs was reduced from 35% in wave 1 to 23% in wave 2. However, Tried to avoid looking/thinking about the PHWs increased 1.5 times the odds of presenting quit intention compared to those respondents who did not try to avoid looking/thinking about the PHWs (OR=1.5; 95%CI: 1.2-2.0). In conclusion, avoidance regarding PHWs may not work as a barrier when aiming at a higher level of quit intention. Salience of the PHWs may increase in the period shortly after their introduction onto packs but can be expected to decrease with time. In other words, it might be advisable to change or renew PHWs after a period of implementation to maintain their beneficial effects.

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