BMC Public Health

Article	Citations
The role of telehealth during COVID-19 outbreak: a systematic review based on current evidence	1084
Early effects of the COVID-19 pandemic on physical activity and sedentary behavior in children living in the U.S.	567
A rapid review of the impact of COVID-19 on the mental health of healthcare workers: implications for supporting psychological well-being	463
COVID-19 mortality risk for older men and women	365
Predicting intention to receive COVID-19 vaccine among the general population using the health belief model and the theory of planned behavior model	274
Trend analysis of cardiovascular disease mortality, incidence, and mortality-to-incidence ratio: results from global burden of disease study 2017	250
A rapid review of mental and physical health effects of working at home: how do we optimise health?	246
The global distribution of acute unintentional pesticide poisoning: estimations based on a systematic review	242
Individual and social determinants of COVID-19 vaccine uptake	229
Migrants’ and refugees’ health status and healthcare in Europe: a scoping literature review	223
Real time surveillance of COVID-19 space and time clusters during the summer 2020 in Spain	213
Effective public health measures to mitigate the spread of COVID-19: a systematic review	198
Associations of health literacy with socioeconomic position, health risk behavior, and health status: a large national population-based survey among Danish adults	189
The frequencies and disparities of adverse childhood experiences in the U.S.	188
Factors influencing variation in implementation outcomes of the redesigned community health fund in the Dodoma region of Tanzania: a mixed-methods study	179
Psychological impact of an epidemic/pandemic on the mental health of healthcare professionals: a rapid review	169
Gender differences of depression and anxiety among social media users during the COVID-19 outbreak in China:a cross-sectional study	164
Barriers and facilitators to the use of e-health by older adults: a scoping review	159
Knowledge, attitudes, and practices (KAP) toward COVID-19: a cross-sectional study in South Korea	149
The impacts of knowledge, risk perception, emotion and information on citizens’ protective behaviors during the outbreak of COVID-19: a cross-sectional study in China	145
Misinformation about COVID-19: evidence for differential latent profiles and a strong association with trust in science	142
Trends in the incidence of diabetes mellitus: results from the Global Burden of Disease Study 2017 and implications for diabetes mellitus prevention	135
A cross-sectional survey of knowledge, attitude and practice associated with COVID-19 among undergraduate students in China	135
Burnout among Portuguese healthcare workers during the COVID-19 pandemic	132
Chinese public’s knowledge, perceived severity, and perceived controllability of COVID-19 and their associations with emotional and behavioural reactions, social participation, and precautionary behav	131

Exercise/physical activity and health outcomes: an overview of Cochrane systematic reviews	127
Vaccination, politics and COVID-19 impacts	123
Occupational burnout and job satisfaction among physicians in times of COVID-19 crisis: a convergent parallel mixed-method study	119
The association between food insecurity and mental health during the COVID-19 pandemic	117
Knowledge, attitude, and acceptance of healthcare workers and the public regarding the COVID-19 vaccine: a cross-sectional study	115
Factors contributing to psychological distress in the working population, with a special reference to gender difference	114
Impacts of COVID-19 and social isolation on academic staff and students at universities: a cross-sectional study	113
Parental COVID-19 vaccine hesitancy for children: vulnerability in an urban hotspot	110
Reduced level of physical activity during COVID-19 pandemic is associated with depression and anxiety levels: an internet-based survey	107
Household solid waste management practices and perceptions among residents in the East Coast of Malaysia	106
Unwillingness to engage in behaviors that protect against COVID-19: the role of conspiracy beliefs, trust, and endorsement of complementary and alternative medicine	106
Establishing the efficacy of interventions to improve health literacy and health behaviours: a systematic review	105
Barriers to childhood immunization in sub-Saharan Africa: A systematic review	102
A comparison of the Indian diet with the EAT-Lancet reference diet	100
Structural racism and COVID-19 response: higher risk of exposure drives disparate COVID-19 deaths among Black and Hispanic/Latinx residents of Illinois, USA	100
A survey on COVID-19 vaccine acceptance and concern among Malaysians	99
Covid-19 effects on the workload of Iranian healthcare workers	97
Housing as a social determinant of health and wellbeing: developing an empirically-informed realist theoretical framework	97
E-cigarettes use in the United States: reasons for use, perceptions, and effects on health	96
Exercise interventions for the prevention of depression: a systematic review of meta-analyses	95
An investigation of depression, anxiety, and stress and its relating factors during COVID-19 pandemic in Iran	94
The relationship between household chaos and child, parent, and family outcomes: a systematic scoping review	89
Can mathematical modelling solve the current Covid-19 crisis?	88
Application of the protection motivation theory for predicting COVID-19 preventive behaviors in Hormozgan, Iran: a cross-sectional study	88
Risk and protective factors of drug abuse among adolescents: a systematic review	87
Media exposure to COVID-19 information, risk perception, social and geographical proximity, and self-rated anxiety in China	87
Impacts of the Covid-19 lockdown and relevant vulnerabilities on capability well-being, mental health and social support: an Austrian survey study	87
Posttraumatic stress disorder and depression of survivors 12 months after the outbreak of Middle East respiratory syndrome in South Korea	86
Factors associated with non-adherence to social distancing rules during the COVID-19 pandemic: a logistic regression analysis	85
The evidence of indirect transmission of SARS-CoV-2 reported in Guangzhou, China	84
Global effect of COVID-19 pandemic on physical activity, sedentary behaviour and sleep among 3- to 5-year-old children: a longitudinal study of 14 countries	84
Epidemiology of Epstein-Barr virus infection and infectious mononucleosis in the United Kingdom	83
Health, psychosocial, and economic impacts of the COVID-19 pandemic on people with chronic conditions in India: a mixed methods study	83
The association between physical activity with incident obesity, coronary heart disease, diabetes and hypertension in adults: a systematic review of longitudinal studies published after 2012	82
The analysis of groundwater nitrate pollution and health risk assessment in rural areas of Yantai, China	82
The association between physical activity and mental health during the first year of the COVID-19 pandemic: a systematic review	82
Quality of life and mortality in the general population: a systematic review and meta-analysis	80
Intention to receive a COVID-19 vaccine: results from a population-based survey in Canada	79
Patriarchy and gender-inequitable attitudes as drivers of intimate partner violence against women in the central region of Ghana	78
The COVID-19 pandemic in Norway and Sweden – threats, trust, and impact on daily life: a comparative survey	78
How fear and collectivism influence public’s preventive intention towards COVID-19 infection: a study based on big data from the social media	76
Beliefs and barriers associated with COVID-19 vaccination among the general population in Saudi Arabia	76
Smoking is associated with worse outcomes of COVID-19 particularly among younger adults: a systematic review and meta-analysis	75
Misinformation and the US Ebola communication crisis: analyzing the veracity and content of social media messages related to a fear-inducing infectious disease outbreak	75
Psychological correlates of COVID-19 pandemic in the Austrian population	73
Sex differences and psychological stress: responses to the COVID-19 pandemic in China	73
Racism in healthcare: a scoping review	72
Stigma for common mental disorders in racial minorities and majorities a systematic review and meta-analysis	72
Suicidal behaviours among adolescents from 90 countries: a pooled analysis of the global school-based student health survey	72
Trends of cervical cancer at global, regional, and national level: data from the Global Burden of Disease study 2019	70

Knowledge, attitudes and perceptions towards COVID-19 vaccinations: a cross-sectional community survey in Bangladesh	70
Patterns and predictors of sick leave after Covid-19 and long Covid in a national Swedish cohort	68
Knowledge, attitudes, and perceptions of COVID-19 vaccine and refusal to receive COVID-19 vaccine among healthcare workers in northeastern Ethiopia	68
Temporal dynamics in total excess mortality and COVID-19 deaths in Italian cities	68
Age differences in demographic, social and health-related factors associated with loneliness across the adult life span (19–65 years): a cross-sectional study in the Netherlands	68
African-led health research and capacity building- is it working?	67
Towards achieving the 90–90–90 HIV targets: results from the south African 2017 national HIV survey	67
Socio-economic inequalities in the multiple dimensions of access to healthcare: the case of South Africa	66
Assessment of self-medication practices in the context of the COVID-19 outbreak in Togo	66
Understanding physical literacy in the context of health: a rapid scoping review	65
Health literacy and its effect on chronic disease prevention: evidence from China’s data	65
Association between electronic cigarette use and tobacco cigarette smoking initiation in adolescents: a systematic review and meta-analysis	64
Demographic, behavioral, and cardiovascular disease risk factors in the Saudi population: results from the Prospective Urban Rural Epidemiology study (PURE-Saudi)	64
The effect of risk communication on preventive and protective Behaviours during the COVID-19 outbreak: mediating role of risk perception	64
Parental health literacy and health knowledge, behaviours and outcomes in children: a cross-sectional survey	64
Risk perception related to COVID-19 among the Iranian general population: an application of the extended parallel process model	64
High prevalence of vitamin D deficiency among the South Asian adults: a systematic review and meta-analysis	63
Internet use and need for digital health technology among the elderly: a cross-sectional survey in China	63
Impact of the COVID-19 crisis on work and private life, mental well-being and self-rated health in German and Swiss employees: a cross-sectional online survey	63
Knowledge, attitudes and practices of the Chinese public with respect to coronavirus disease (COVID-19): an online cross-sectional survey	62
Obesity is associated with severe disease and mortality in patients with coronavirus disease 2019 (COVID-19): a meta-analysis	62
Individual and community level factors associated with anemia among lactating mothers in Ethiopia using data from Ethiopian demographic and health survey, 2016; a multilevel analysis	61
Modelling and prediction of global non-communicable diseases	60
The prevalence rate of sexual violence worldwide: a trend analysis	60
Working from home during the COVID-19 outbreak in Sweden: effects on 24-h time-use in office workers	59
Covid-19 and non-communicable diseases: evidence from a systematic literature review	59
Effects of positive and negative childhood experiences on adult family health	58
Lifestyle changes during the first wave of the COVID-19 pandemic: a cross-sectional survey in the Netherlands	58
Association between COVID-19 vaccine hesitancy and generalized trust, depression, generalized anxiety, and fear of COVID-19	58
Knowledge, attitudes, anxiety, and preventive behaviours towards COVID-19 among health care providers in Yemen: an online cross-sectional survey	58
Health authorities’ health risk communication with the public during pandemics: a rapid scoping review	57
A cross-sectional survey of knowledge, attitude and practice (KAP) towards COVID-19 pandemic among the Syrian residents	56
A systematic review of sexual and reproductive health interventions for young people in humanitarian and lower-and-middle-income country settings	56
Performance of India’s national publicly funded health insurance scheme, Pradhan Mantri Jan Arogaya Yojana (PMJAY), in improving access and financial protection for hospital care: findings from househ	56
The impacts of collaboration between local health care and non-health care organizations and factors shaping how they work: a systematic review of reviews	56
A systematic literature review of the global seroprevalence of cytomegalovirus: possible implications for treatment, screening, and vaccine development	56
Consequences of COVID-19 crisis for persons with HIV: the impact of social determinants of health	56
Non-communicable diseases among adolescents: current status, determinants, interventions and policies	55
Global trends and predictors of face mask usage during the COVID-19 pandemic	55
Defining the commercial determinants of health: a systematic review	54
Worry and mental health in the Covid-19 pandemic: vulnerability factors in the general Norwegian population	54
Lonely places or lonely people? Investigating the relationship between loneliness and place of residence	54
Workplace violence against hospital healthcare workers in China: a national WeChat-based survey	54
Understanding the impact of COVID-19 on youth sport in Australia and consequences for future participation and retention	54
Vaccine hesitancy: evidence from an adverse events following immunization database, and the role of cognitive biases	52
An examination of the socio-demographic correlates of patient adherence to self-management behaviors and the mediating roles of health attitudes and self-efficacy among patients with coexisting type 2	52
Impact of the Covid-19 pandemic on perinatal mental health (Riseup-PPD-COVID-19): protocol for an international prospective cohort study	51
Land and nature as sources of health and resilience among Indigenous youth in an urban Canadian context: a photovoice exploration	51
The association between BMI and health-related physical fitness among Chinese college students: a cross-sectional study	51
Airborne particulate matter, population mobility and COVID-19: a multi-city study in China	51
Home food procurement impacts food security and diet quality during COVID-19	51
The actual and anticipated effects of a menthol cigarette ban: a scoping review	51
Determinants of under-nutrition among children under five years of age in Ethiopia	50
The impact of COVID-19 quarantine on dietary habits and physical activity in Saudi Arabia: a cross-sectional study	50
Interventions to support people exposed to adverse childhood experiences: systematic review of systematic reviews	50
The impact of the COVID-19 pandemic on stress, mental health and coping behavior in German University students – a longitudinal study before and after the onset of the pandemic	50
Readability of online COVID-19 health information: a comparison between four English speaking countries	50
Distance learning in Italian primary and middle school children during the COVID-19 pandemic: a national survey	50
Determinants of rural-urban differential in healthcare utilization among the elderly population in India	50
The relationship between screen-based sedentary behaviors and symptoms of depression and anxiety in youth: a systematic review of moderating variables	50
What have we learned about COVID-19 volunteering in the UK? A rapid review of the literature	50
A systematic review of studies that measure parental vaccine attitudes and beliefs in childhood vaccination	49
Capability, opportunity, and motivation: an across contexts empirical examination of the COM-B model	49
Facilitators and barriers to HIV pre-exposure prophylaxis (PrEP) uptake through a community-based intervention strategy among adolescent girls and young women in Seme Sub-County, Kisumu, Kenya	48
History for some or lesson for all? A systematic review and meta-analysis on the immediate and long-term mental health impact of the 2002–2003 Severe Acute Respiratory Syndrome (SARS) outbreak	48
Effectiveness of ICT-based intimate partner violence interventions: a systematic review	48
Effects of the COVID-19 pandemic on sexual functioning and activity: a systematic review and meta-analysis	48
Changes in sedentary behaviour in European Union adults between 2002 and 2017	48
Racial differences in institutional trust and COVID-19 vaccine hesitancy and refusal	47
Factors that influence mental health of university and college students in the UK: a systematic review	47
Burden of caregivers of children with cerebral palsy: an intersectional analysis of gender, poverty, stigma, and public policy	47
Psychosocial support interventions for improved adherence and retention in ART care for young people living with HIV (10–24 years): a scoping review	46
COVID-19: a National Survey on perceived level of knowledge, attitude and practice among frontline healthcare Workers in Nepal	46
A survival analysis of COVID-19 in the Mexican population	46
Environmental determinants of population health in urban settings. A systematic review	46
Population preferences and attitudes towards COVID-19 vaccination: a cross-sectional study from Pakistan	46
The association between obesity and quality of life: a retrospective analysis of a large-scale population-based cohort study	46
The use of Qualitative Comparative Analysis (QCA) to address causality in complex systems: a systematic review of research on public health interventions	45
Practice and technique of using face mask amongst adults in the community: a cross-sectional descriptive study	45
The epidemiological characteristic and trends of burns globally	45

Examining the application of behaviour change theories in the context of infectious disease outbreaks and emergency response: a review of reviews	45
Racial discrimination and health: a prospective study of ethnic minorities in the United Kingdom	44
Electronic media use and sleep in children and adolescents in western countries: a systematic review	44
Psychosocial health of school-aged children during the initial COVID-19 safer-at-home school mandates in Florida: a cross-sectional study	44
Prevalence and factors associated with double and triple burden of malnutrition among mothers and children in Nepal: evidence from 2016 Nepal demographic and health survey	44
Access to health services among culturally and linguistically diverse populations in the Australian universal health care system: issues and challenges	44
Burden and changes in HIV/AIDS morbidity and mortality in Southern Africa Development Community Countries, 1990–2017	44
Social media use and mental health during the COVID-19 pandemic in young adults: a meta-analysis of 14 cross-sectional studies	44
The relationship between telework from home and employee health: a systematic review	43
Promoting healthy foods in the new digital era on Instagram: an experimental study on the effect of a popular real versus fictitious fit influencer on brand attitude and purchase intentions	43
Covert use of contraception in three sub-Saharan African countries: a qualitative exploration of motivations and challenges	43
Lifestyle habits of adults during the COVID-19 pandemic lockdown in Cyprus: evidence from a cross-sectional study	43
Physical activity and mental well-being under COVID-19 lockdown: a cross-sectional multination study	43
Association between urban environment and mental health in Brussels, Belgium	43
The psychological burden experienced by Chinese citizens during the COVID-19 outbreak: prevalence and determinants	43
Sociodemographic factors associated with acceptance of COVID-19 vaccine and clinical trials in Uganda: a cross-sectional study in western Uganda	43
The association between silica exposure, silicosis and tuberculosis: a systematic review and meta-analysis	42
The impact of the Adolescent Girls Empowerment Program (AGEP) on short and long term social, economic, education and fertility outcomes: a cluster randomized controlled trial in Zambia	42
A systematic literature review of existing conceptualisation and measurement of mental health literacy in adolescent research: current challenges and inconsistencies	42
Factors related to preventive COVID-19 behaviors using health belief model among general population: a cross-sectional study in Iran	41
Variation in human mobility and its impact on the risk of future COVID-19 outbreaks in Taiwan	41
Associations between physical activity, sedentary behaviour and self-rated health among the general population of children and adolescents: a systematic review and meta-analysis	41
When lockdown policies amplify social inequalities in COVID-19 infections: evidence from a cross-sectional population-based survey in France	41
Association between PM2.5 and risk of hospitalization for myocardial infarction: a systematic review and a meta-analysis	41
Impact of front-of-pack nutrition labels on consumer purchasing intentions: a randomized experiment in low- and middle-income Mexican adults	41
Prevalence and determinants of undernutrition among under-five children residing in urban slums and rural area, Maharashtra, India: a community-based cross-sectional study	41
Lay perspectives on social distancing and other official recommendations and regulations in the time of COVID-19: a qualitative study of social media posts	41
Inequalities in the utilisation of maternal health Care in Rural India: Evidences from National Family Health Survey III & IV	41
COVID-19 vaccine hesitancy in the UK: a longitudinal household cross-sectional study	41
Prevalence of dyslipidemia and associated risk factors among adults aged ≥35 years in northern China: a cross-sectional study	41
Knowledge, attitude, and practice regarding antibiotic use and resistance among medical students in Colombia: a cross-sectional descriptive study	41
The protection motivation theory for predict intention of COVID-19 vaccination in Iran: a structural equation modeling approach	41
COVID-19 outbreak in Brazil: adherence to national preventive measures and impact on people’s lives, an online survey	40
Comparative analysis of COVID-19 guidelines from six countries: a qualitative study on the US, China, South Korea, the UK, Brazil, and Haiti	40
Bibliometric analysis of global scientific literature on vaccine hesitancy in peer-reviewed journals (1990–2019)	40
Relationships between health outcomes in older populations and urban green infrastructure size, quality and proximity	40
Exploring the spatial-temporal distribution and evolution of population aging and social-economic indicators in China	40
Provision of peer support at the intersection of homelessness and problem substance use services: a systematic ‘state of the art’ review	40
The impact of the COVID-19 pandemic on Sexually Transmitted Infections surveillance data: incidence drop or artefact?	40
A meta-analysis on the risk factors adjusted association between cardiovascular disease and COVID-19 severity	39
Mask use among pedestrians during the Covid-19 pandemic in Southwest Iran: an observational study on 10,440 people	39
Aboriginal community controlled health organisations address health equity through action on the social determinants of health of Aboriginal and Torres Strait Islander peoples in Australia	39
Smoking, heavy drinking, physical inactivity, and obesity among middle-aged and older adults in China: cross-sectional findings from the baseline survey of CHARLS 2011–2012	39
Trends in the consumption rates of benzodiazepines and benzodiazepine-related drugs in the health region of Lleida from 2002 to 2015	39
Knowledge, socio-cognitive perceptions and the practice of hand hygiene and social distancing during the COVID-19 pandemic: a cross-sectional study of UK university students	38
Trends in cervical cancer mortality in China from 1989 to 2018: an age-period-cohort study and Joinpoint analysis	38
Attitudes, behaviours and barriers to public health measures for COVID-19: a survey to inform public health messaging	38
Image-and-text health warning labels on alcohol and food: potential effectiveness and acceptability	38
Factors associated with the intention of Syrian adult population to accept COVID19 vaccination: a cross-sectional study	38
Key facets to build up eHealth and mHealth interventions to enhance physical activity, sedentary behavior and nutrition in healthy subjects – an umbrella review	38
The association between incidence and mortality of brain cancer and human development index (HDI): an ecological study	37
Community knowledge and practices regarding antibiotic use in rural Mozambique: where is the starting point for prevention of antibiotic resistance?	37
Explaining the reasons for not maintaining the health guidelines to prevent COVID-19 in high-risk jobs: a qualitative study in Iran	37
Exploring factors constraining utilization of contraceptive services among adolescents in Southeast Nigeria: an application of the socio-ecological model	37
The impact of COVID-19 on physical activity behaviour in Italian primary school children: a comparison before and during pandemic considering gender differences	37
Trends of multimorbidity in 15 European countries: a population-based study in community-dwelling adults aged 50 and over	37
Information uncertainty: a correlate for acute stress disorder during the COVID-19 outbreak in China	37
Impact of social participation on health among middle-aged and elderly adults: evidence from longitudinal survey data in China	37
Women’s autonomy in health decision-making and its effect on access to family planning services in Senegal in 2017: a propensity score analysis	37
Barriers of effective health insurance coverage for rural-to-urban migrant workers in China: a systematic review and policy gap analysis	37
The heterogeneity of the COVID-19 pandemic and national responses: an explanatory mixed-methods study	36
The impact of the COVID-19 pandemic on mental health and well-being of people living with a long-term physical health condition: a qualitative study	36
Personality and individual attitudes toward vaccination: a nationally representative survey in the United States	36
Causes of anxiety among teachers giving face-to-face lessons after the reopening of schools during the COVID-19 pandemic: a cross-sectional study	36
Spatial analysis of factors associated with HIV infection in Malawi: indicators for effective prevention	36
Unintended socio-economic and health consequences of COVID-19 among slum dwellers in Kampala, Uganda	36
Social media use informing behaviours related to physical activity, diet and quality of life during COVID-19: a mixed methods study	36
Prevalence of elder abuse and victim-related risk factors during the COVID-19 pandemic in China	36
Screen time duration and timing: effects on obesity, physical activity, dry eyes, and learning ability in elementary school children	35
Keeping children healthy during and after COVID-19 pandemic: meeting youth physical activity needs	35
From TVs to tablets: the relation between device-specific screen time and health-related behaviors and characteristics	35
Meaningful activities during COVID-19 lockdown and association with mental health in Belgian adults	35
Attitudes of Lebanese adults regarding COVID-19 vaccination	35
Complete basic childhood vaccination and associated factors among children aged 12–23 months in East Africa: a multilevel analysis of recent demographic and health surveys	35
“Meet people where they are”: a qualitative study of community barriers and facilitators to HIV testing and HIV self-testing among African Americans in urban and rural areas in North Carolina	35
Correction to: Reduced level of physical activity during COVID-19 pandemic is associated with depression and anxiety levels: an internet-based survey	35
Effectiveness of personal protective health behaviour against COVID-19	35
Risk of COVID-19 infection among prison staff in the United States	35
Internet Gaming Disorder in adolescence: investigating profiles and associated risk factors	35
Effects of trees, gardens, and nature trails on heat index and child health: design and methods of the Green Schoolyards Project	35
Protocol of a population-based prospective COVID-19 cohort study Munich, Germany (KoCo19)	35
Experiences of COVID-19-related anti-Asian discrimination and affective reactions in a multiple race sample of U.S. young adults	35
Sustainable by design: a systematic review of factors for health promotion program sustainability	35
Association of childhood out-of-home care status with all-cause mortality up to 42-years later: Office of National Statistics Longitudinal Study	35
Mapping out a spectrum of the Chinese public’s discrimination toward the LGBT community: results from a national survey	34
Health system’s readiness to provide cardiovascular, diabetes and chronic respiratory disease related services in Nepal: analysis using 2015 health facility survey	34
COVID-19: challenges faced by Nepalese migrants living in Japan	34
Global, regional, and national burden of disease study of atrial fibrillation/flutter, 1990–2019: results from a global burden of disease study, 2019	34
Racial and ethnic disparities in subjective cognitive decline: a closer look, United States, 2015–2018	34
The impact of COVID-19 lockdown on physical activity and weight gain among active adult population in Israel: a cross-sectional study	34
Is industrial pollution detrimental to public health? Evidence from the world’s most industrialised countries	34
Early public adherence with and support for stay-at-home COVID-19 mitigation strategies despite adverse life impact: a transnational cross-sectional survey study in the United States and Australia	34
The pre-exposure prophylaxis (PrEP) consciousness of black college women and the perceived hesitancy of public health institutions to curtail HIV in black women	34
Exposure to ambient fine particulate matter is associated with changes in fasting glucose and lipid profiles: a nationwide cohort study	34
Prevalence, awareness and control of type 2 diabetes mellitus and risk factors in Chinese elderly population	34