An introduction to systematic reviews and meta-analyses in health care.

Birth weight and risk of type 2 diabetes: a systematic review. JAMA (2008) 6.73

Variations in primary open-angle glaucoma prevalence by age, gender, and race: a Bayesian meta-analysis. Invest Ophthalmol Vis Sci (2006) 2.26

Age and gender variations in age-related macular degeneration prevalence in populations of European ancestry: a meta-analysis. Ophthalmology (2011) 1.96

Is birth weight a risk factor for ischemic heart disease in later life? Am J Clin Nutr (2007) 1.93

A comparison of questionnaire, accelerometer, and pedometer: measures in older people. Med Sci Sports Exerc (2009) 1.69

Early emergence of ethnic differences in type 2 diabetes precursors in the UK: the Child Heart and Health Study in England (CHASE Study). PLoS Med (2010) 1.68

Effect of breastfeeding and sociodemographic factors on visual outcome in childhood and adolescence. Am J Clin Nutr (2008) 1.61

Ethnic differences in carotid intima-media thickness between UK children of black African-Caribbean and white European origin. Stroke (2012) 1.46

Birthweight and risk markers for type 2 diabetes and cardiovascular disease in childhood: the Child Heart and Health Study in England (CHASE). Diabetologia (2014) 1.40

An ensemble classification-based approach applied to retinal blood vessel segmentation. IEEE Trans Biomed Eng (2012) 1.34

Does β-adrenoceptor blocker therapy improve cancer survival? Findings from a population-based retrospective cohort study. Br J Clin Pharmacol (2011) 1.21

Birth weight and subsequent cholesterol levels: exploration of the "fetal origins" hypothesis. JAMA (2004) 1.20

Breast-feeding and childhood cancer: A systematic review with metaanalysis. Int J Cancer (2005) 1.19

Ethnic differences in blood lipids and dietary intake between UK children of black African, black Caribbean, South Asian, and white European origin: the Child Heart and Health Study in England (CHASE). Am J Clin Nutr (2010) 1.16

The relationship between physical activity, sedentary behaviour and psychological wellbeing among adolescents. Soc Psychiatry Psychiatr Epidemiol (2007) 1.09

Are ethnic and gender specific equations needed to derive fat free mass from bioelectrical impedance in children of South asian, black african-Caribbean and white European origin? Results of the assessment of body composition in children study. PLoS One (2013) 1.04

Breast-feeding and cancer: the Boyd Orr cohort and a systematic review with meta-analysis. J Natl Cancer Inst (2005) 1.02

Influence of adiposity on insulin resistance and glycemia markers among U.K. Children of South Asian, black African-Caribbean, and white European origin: child heart and health study in England. Diabetes Care (2013) 1.02

Interleukin 18 and coronary heart disease: prospective study and systematic review. Atherosclerosis (2011) 0.98

Socio-economic position and type 2 diabetes risk factors: patterns in UK children of South Asian, black African-Caribbean and white European origin. PLoS One (2012) 0.96

Sex differences in the association between birth weight and total cholesterol. A meta-analysis. Ann Epidemiol (2005) 0.92

The effect of breastfeeding on cardiorespiratory risk factors in adult life. Pediatrics (2007) 0.91

Ethnic differences in the prevalence of myopia and ocular biometry in 10- and 11-year-old children: the Child Heart and Health Study in England (CHASE). Invest Ophthalmol Vis Sci (2010) 0.86

Childhood ethnic differences in ametropia and ocular biometry: the Aston Eye Study. Ophthalmic Physiol Opt (2011) 0.84

Refractive and corneal astigmatism in white school children in northern ireland. Invest Ophthalmol Vis Sci (2011) 0.84

Dietary energy intake is associated with type 2 diabetes risk markers in children. Diabetes Care (2013) 0.83

Ethnic and socioeconomic influences on childhood blood pressure: the Child Heart and Health Study in England. J Hypertens (2012) 0.82

Delineation of blood vessels in pediatric retinal images using decision trees-based ensemble classification. Int J Comput Assist Radiol Surg (2013) 0.80

Cardiometabolic risk markers in Indian children: comparison with UK Indian and white European children. PLoS One (2012) 0.77

Commentary: early life determinants of blood pressure in childhood--where do we go from here? Int J Epidemiol (2006) 0.75

Physical Activity and Sedentary Behaviors Levels of Kuwaiti Adolescents: The Study of Health and Activity Among Adolescents in Kuwait. J Phys Act Health (2017) 0.75