A Longitudinal Study of Chronic Periodontitis in Two Cohorts of Community-Dwelling Elderly Australians.

Background: The study aimed to estimate and compare the incidence and progression of chronic periodontitis among two generations of older Australian adults. Methods: Data were from two population-based cohort studies of Australian older adults aged 60+ years South Australian Dental Longitudinal Studies (SADLS), SADLS I (1991-1992) and SADLS II (2013-2014). American Academy of Periodontology/the U.S. Centres for Disease Control and Prevention (CDC/AAP), and the 2018 European Federation of Periodontology classification (EFP/AAP) case definitions were used to define and calculate the incidence and progression of chronic periodontitis. Multivariable Poisson regression models were used to estimate incidence risk ratios (IRRs) of periodontitis. Results: A total 567 and 201 dentate respondents had periodontal exams in SADLS I and II, respectively. The incidence rate was greater in SADLS II than in SADLS I, approximately 200 vs. 100/1000 person years, respectively. Current smokers had more than two times higher IRRs, 2.38 (1.30-4.34) and 2.30 (1.24-4.26), than their non-smoking counterparts in the previous generation under the CDC/AAP and EFP/AAP, respectively. Conclusions: The most recent generation of older adults has greater incidence and progression of periodontitis than the previous generation. Being a current tobacco smoker was a significant risk factor for both the incidence and progression of periodontitis.

"Eat clean, train mean, get lean": Body image and health behaviours of women who engage with fitspiration and clean eating imagery on Instagram.

The present study examined the relationship between posting or viewing fitspiration and clean eating imagery in relation to body image, disordered eating, and compulsive exercise among women. Participants (269 women aged 18-30 years) who posted and/or viewed fitspiration, clean eating or travel imagery on Instagram completed an online cross-sectional questionnaire. Results showed engaging with fitspiration and clean eating material (either posting or viewing) was significantly positively associated with increased levels of compulsive exercise and athletic-ideal internalization. However, only viewing (not posting) fitspiration and clean eating content was significantly related to thin-ideal internalization and disordered eating symptomatology. Athletic-ideal internalization mediated the relationships between posting fitspiration/clean eating and disordered eating symptomatology and compulsive exercise. Both thin-ideal internalization and athletic-ideal internalization mediated the relationship between viewing fitspiration/clean eating material and disordered eating and compulsive exercise. Overall, the findings suggest that viewing fitspiration and clean eating content on Instagram is negatively associated with thin-ideal internalization and disordered eating symptomatology, however the same relationships do not exist for people who frequently post these types of material. The mediational pathways provide a nuanced understanding of how engaging with fitspiration and clean eating material on social media influences female users' body image and health behaviour.

Prevalence, extent, and severity of periodontitis among Australian older adults: Comparison of two generations.

BACKGROUND: Chronic periodontitis is highly prevalent among older adults. The study aimed to compare periodontal disease among Australian older adults in two generations. We hypothesized that the prevalence and severity of periodontitis would decrease from the previous generation to the recent generation. METHODS: Data were obtained from the South Australian Dental Longitudinal Study (SADLS) in 1991 to 1992 (SADLS I) and 2013 to 2014 (SADLS II); population-based longitudinal surveys of Australian older adults aged ≥60 years. American Academy of Periodontology, the US Centers for Disease Control and Prevention (AAP/CDC), and the 2018 European Federation of Periodontology (EFP/AAP) classification case definitions were used to define and calculate prevalence of chronic periodontitis. Multivariable log-Poisson regression models were used to identify risk indicators for severe periodontitis after adjusting for other covariates. RESULTS: There were a total of 801 and 355 participants that underwent a periodontal exam in SADLS I and II, respectively. The prevalence of severe periodontitis was higher in the recent generation (88% and 56%) than the previous generation (75% and 46.7%) under the CDC/AAP and EFP/AAP case definitions, respectively. The mean number of missing teeth was lower in the recent generation (6) than the previous generation (13). The prevalence ratio of severe periodontitis was around two times higher in the younger age group, men, those not born in Australia, and current smokers across both generations. CONCLUSIONS: Our findings indicated that the recent generation of older adults has higher prevalence and severity of chronic periodontitis than the previous generation. Our findings indicated that aging, being male, born overseas, low household income, no dental insurance, and being a current smoker are significant risk factors associated with severe periodontitis among older Australians.

No likes, no problem? Users' reactions to the removal of Instagram number of likes on other people's posts and links to body image.

In the age of social media, "likes" are increasingly considered a numerical indicator of popularity and a measure of self-worth. Using an online questionnaire, Australian women (N = 291) aged 18-55 years self-reported their reaction to Instagram removing the visibility of the number of likes from other people's posts, and completed measures of comparison and body image. Findings showed that the majority of participants were in favour of the removal (66.7 %), followed by those who were unsure (23.4 %). Interestingly, those who did not support the removal made significantly greater appearance comparisons based on likes than those who were in favour of the removal of the number of likes. Internalization of the thin ideal mediated the relationship between investment in and comparison with likes and body dissatisfaction. Results also demonstrated that women believe removing the visibility of the number of likes may facilitate a reduction in negative self-focus (comparisons and competitiveness) and improve mental health. Future research is needed to further investigate how the visibility of likes affects women's mental health and body image outcomes in other cultural contexts and across other social media platforms.

The prevalence and severity of root surface caries across Australian generations.

BACKGROUND: The "failure of success" theory predicts that as subsequent generations of older adults retain more teeth, those additional teeth will experience more oral disease like root surface caries. The theory in relation to root surface caries has never been tested in a cross-generational study. This study aims to compare root surface caries across generations of South Australian older adults to test the theory and explore risk indicators for root surface caries. METHODS: Data were from the baseline of two South Australian studies separated by 22 years. In both studies, stratified random samples of people aged 60+ years from Adelaide and Mount Gambier were recruited. Dental examinations were performed by trained and calibrated dentists. One of the dental examiners from the earlier study was the gold standard examiner in the second study. Risk indicators included behavioural factors, clinical oral conditions, sociodemographic and socioeconomic status. Root surface caries was assessed as untreated root surface caries (root decayed surfaces [RDS]), treated root surface caries (root filled surfaces [RFS]) and treated or untreated root surface caries (root decayed and filled surfaces [RDFS]) and was presented as the prevalence and summed count. Multivariable models for Poisson and negative binomial distributions were used to estimate prevalence ratios (PR) and mean ratios (MR), respectively, and their 95% confidence intervals (95% CI). RESULTS: The current generation of South Australian older adults has significantly lower RDS (PR [95% CI] = 0.65 [0.47-0.89]; MR [95% CI] = 0.51 [0.35-0.73]) and RDFS (PR [95% CI] = 0.84 [0.71-0.99]; MR [95% CI] = 0.76 [0.65-0.90]) than the previous generation. The RFS in the previous and current generation was similar. Gingival recession, irregular brushing, dental visiting for a problem and smoking were the indicators for RDS, while age, gingival recession, tooth brushing frequency, time since last dental visit and reason of visiting were the indicators for RFS or RDFS. CONCLUSIONS: These results do not support the "failure of success" theory in relation to root surface caries among South Australian older adults. Despite the higher number of teeth retained, the current generation of older adults has less root surface caries than the previous generation. Behavioural factors remain the indicators of root surface caries across the generations.

Socioeconomic gradients in toothache experience among Australian adults: A time trend analysis from 1994 to 2013.

OBJECTIVES: To identify time trend pattern in toothache and to estimate whether toothache prevalence differs by socioeconomic position and residential location over time. METHODS: Data from nine successive National Dental Telephone Interview Surveys (NDTIS) from 1994 (n = 6907) to 2013 (n = 6778) performed in Australia among individuals aged 15 years or over were used. The dependent variable was toothache reported very often, often or sometimes during the previous 12 months. Independent variables were age group, household income (tertiles), insurance/cardholder status and geographical remoteness. Prais-Winsten analyses were performed, and the average annual percentage change (AAPC) for toothache prevalence was estimated. RESULTS: Toothache affected slightly more than 10% of the overall population in 1994 (11.6%) and 1995 (11.4%), reaching approximately one-sixth (16.2%) of individuals in 2013. Overall, there was a significant increase in toothache prevalence over time (AAPC = 2.0% [95% CI 0.7;1.34]) and in those aged 25-44 (AAPC 2.1% [95% CI 0.6;3.6]) and 45-64 (AAPC 3.4% [95% CI 1.5;5.3]) years and markedly among those in the lowest income group (AAPC 3.4% [95% CI 0.1;6.7]). All geographic locations except for remote/very remote areas had upward toothache prevalence over time. Insured status was not associated with increased toothache prevalence during the investigated period. CONCLUSIONS: Toothache prevalence increased from 1994 to 2013 in Australian adults particularly among the lowest socioeconomic group.

Australia's sugar tale.

OBJECTIVE: To establish high intake of free sugars and its related disease burden as a significant public health challenge in Australia. DESIGN: We discuss five key actions to reduce intake of free sugars tailored to the Australian context. These strategies are informed by reviewing the global scientific evidence on the effectiveness of a range of policy responses to reduce intake of free sugars at the population level. SETTING: Australia. PARTICIPANTS: Australian population. RESULTS: The five key actions to reduce population levels for intake of free sugars tailored to the Australian context include prioritising health in trade agreements and policy; introducing a fiscal policy supporting health and promoting food reformulation; regulating advertising and improving labelling; strengthening the current dietary guidelines; and encouraging healthy choices. CONCLUSIONS: The adoption and implementation of the strategies discussed in the current commentary would aid in tackling the rising health burden from the intake of free sugars in Australia.

How much free sugar do Australians consume? Findings from a national survey.

OBJECTIVE: To identify the characteristics of Australian adults exceeding the World Health Organization's free sugar (FS) intake recommendations of <10% and compare the sources of FS among those exceeding (high FS consumers) and complying (low FS consumers) with the recommendations. METHOD: Nationally weighted data from the Australian National Nutrition and Physical Activity Survey 2011-12 was used to describe the proportions of FS consumption and sources of FS among adults aged ≥18 years (n=9,435) across demographic, socioeconomic and health behavioural subgroups. Six categories of food groups likely to contain FS were generated and analysed. RESULTS: Almost half of all adults (47%) were high FS consumers. More than one-third of adults in each demographic, socioeconomic and health behaviour subgroup were high FS consumers. Of the food groups containing FS, beverages contributed the most FS (37%), particularly for young adults (48%). High FS consumers obtained twice as much FS from beverages (42%) than low FS consumers (21%). A reverse age gradient was observed for the FS sourced from beverages. CONCLUSIONS: Almost half the Australians surveyed exceeded the FS intake recommendations. Sugary beverages were the largest source of FS, with young adults being the highest consumers. Implications for public health: Whole population strategies targeting beverages could possibly reduce Australia's high sugar intake.

Determinants of knowledge and attitudes about sugar and the association of knowledge and attitudes with sugar intake among adults: A systematic review.

Efforts to reduce sugar intake levels have been primarily limited to increasing knowledge and changing attitudes. We conducted a systematic review to (1) identify factors influencing adults' knowledge and attitudes about sugar, and (2) determine if there is an association between knowledge and attitudes about sugar and sugar intake. We searched 15 electronic databases from inception to December 2016 for English language publications including adults with relevant exposure and outcome measures. Findings were summarised meta-narratively. Of 3287 studies, 22 studies (14 for objective one and 8 for objective two) were included. Individual (liking of sugary food), interpersonal (attitudes of peers) and environmental factors (media, health professionals and food labelling) influenced adults' knowledge and attitudes about sugar, at least to some extent. Overall, quality of the studies included in our review was weak, and evidence for the application of the Knowledge-Attitude-Behavior model for understanding sugar intake is limited. Protocol registered in the PROSPERO International prospective register of systematic reviews (registration number CRD42015027540).

Investigating societal determinants of oral health-Opportunities and challenges in multilevel studies.

The high prevalence of oral diseases and the persistent nature of socioeconomic inequalities in oral health outcomes across societies presents a significant challenge for public health globally. A debate exists in epidemiology on the merits of investigating population variations in health and its determinants over studying individual health and its individual risk factors. The choice of analytical unit for health outcomes at the population level has policy implications and consequences for the causal understanding of population-level variations in health/disease. There is a lack of discussion in oral epidemiology on the relevance of studying population variations in oral health. Evidence on the role of societal factors in shaping variations in oral health at both the individual level and the population level is also mounting. Multilevel studies are increasingly applied in social epidemiology to address hypotheses generated at different levels of social organization, but the opportunities offered by multilevel approaches are less applied for studying determinants of oral health at the societal level. Multilevel studies are complex as they aim to examine hypotheses generated at multiple levels of social organization and require attention to a range of theoretical and methodological aspects from the stage of design to analysis and interpretation. This discussion study aimed to highlight the value in studying population variations in oral health. It discusses the opportunities provided by multilevel approaches to study societal determinants of oral health. Finally, it reviews the key methodological aspects related to operationalizing multilevel studies of societal determinants of oral health.

Area-level income inequality and oral health among Australian adults-A population-based multilevel study.

BACKGROUND: A lack of evidence exists on the association between area-level income inequality and oral health within Australia. This study examined associations between area-level income inequality and oral health outcomes (inadequate dentition (<21 teeth) and poor self-rated oral health) among Australian adults. Variations in the association between area-level income inequality and oral health outcomes according to area-level mean income were also assessed. Finally, household-income gradients in oral health outcomes according to area-level income inequality were compared. METHODS: For the analyses, data on Australian dentate adults (n = 5,165 nested in 435 Local Government Areas (LGAs)) was obtained from the National Dental Telephone Interview Survey-2013. Multilevel multivariable logistic regression models with random intercept and fixed slopes were fitted to test associations between area-level income inequality and oral health outcomes, examine variations in associations according to area-level mean income, and examine variations in household-income gradients in outcomes according to area-level income inequality. Covariates included age, sex, LGA-level mean weekly household income, geographic remoteness and household income. RESULTS: LGA-level income inequality was not associated with poor self-rated oral health and inversely associated with inadequate dentition (OR: 0.64; 95% CI: 0.48, 0.87) after adjusting for covariates. Inverse association between income inequality and inadequate dentition at the individual level was limited to LGAs within the highest tertile of mean weekly household income. Household income gradients in both outcomes showed poorer oral health at lower levels of household income. The household income gradients for inadequate dentition varied according to the LGA-level income inequality. CONCLUSION: Findings suggest that income inequality at the LGA-level in Australia is not positively associated with poorer oral health outcomes. Inverse association between income inequality and inadequate dentition is likely due to the contextual differences between Australia and other high-income countries.

Theoretical basis and explanation for the relationship between area-level social inequalities and population oral health outcomes - A scoping review.

This study was conducted to review the evidence on the association between area-level social inequalities and population oral health according to type and extent of social theories. A scoping review was conducted of studies, which assessed the association between area-level social inequality measures, and population oral health outcomes including self-rated oral health, number of teeth, dental caries, periodontal disease, tooth loss, oral health-related quality of life (OHRQoL) and dental pain. A search strategy was applied to identify evidence on PubMed, MEDLINE (Ovid), EMBASE, Web of Science, ERIC, Sociological Abstracts, Social Services Abstracts, references of selected studies, and further grey literature. A qualitative content analysis of the selected studies was conducted to identify theories and categorize studies according to their theoretical basis. A total of 2892 studies were identified with 16 included in the review. Seven types of social theories were used on 48 occasions within the selected studies including: psychosocial (n=13), behavioural (n=10), neo-material (n=10), social capital (n=6), social cohesion (n=4), material (n=3) and social support (n=2). Of the selected studies, four explicitly tested social theories as pathways from inequalities to population oral health outcomes, three used a theoretical construct, seven used theories for post-hoc explanation and two did not have any use of theory. In conclusion, psychosocial theories were used most frequently. Although theories were often mentioned, majority of these studies did not test a social theory.

Population ageing and dental care.

Population ageing is a fact in both developed and developing countries. The concern about population ageing largely arises from the combination of a greater number of older people requiring greater amounts of healthcare services and pensions, and relatively fewer people working to pay for them. Oral health and dental care are important aspects of health and health care. Lower rates of edentulism and an ageing population mean that older people will feature more prominently in dental services. Traditionally, economic studies of ageing have focused on the fiscal implications of ageing, projecting the increased burden on health and welfare services that accompanies ageing. It assumed that ageing is the major driver of recent changes and those past trends will simply be amplified by faster population ageing in the future. Less work has been done to understand other past drivers of increased healthcare spending and their implications for the future. The conclusion of these reports is usually that population ageing is unaffordable with current policy settings. They have proposed policies to deal with population ageing which focused on increasing workforce participation and worker productivity to increase the tax base and reducing entitlements. However, the affordability question is as much political as a numerical. There are no clearly articulated criteria for affordability and little opportunity for public discourse about what citizens are willing to pay in taxes to support an ageing population. While the reports do not necessarily reflect public opinion, they will certainly shape it. Predicting the future for oral health is more fraught than for general health, as oral health is in the midst of an epidemiological transition from high rates of edentulism and tooth loss to low rates. Changes in the pattern of dental expenditure in the past do not mirror the experience of rapid increases in per capita expenditure on older age groups as regards general health. Dentistry's marginal status means that less work has been done to understand the future consequences of these changes and how they will interact with population ageing. Further than this though, we need to understand why the future might look as these projections suggest, so that we may look at ways that it can be shaped.

Government subsidies for dental care in Australia.

OBJECTIVES: To evaluate the impact of recent changes in public subsidies for oral health care in Australia, and to propose more effective and equitable uses of Commonwealth Government subsidies. METHODS: Review of literature and Australian Research Centre for Population Oral Health information. RESULTS: Commonwealth subsidies for oral health care services in Australia have been moved from public dental services to private dental health insurance. This has resulted in a redistribution of funds from people on low incomes with poor oral health, to people on middle to high incomes with relatively better oral health. CONCLUSIONS: Public funding for dental care in Australia favours the financially and orally better off at the expense of disadvantaged and orally unhealthy Australians. Current approaches to public funding for oral health services in Australia are unlikely to result in a substantial improvement in oral health. IMPLICATIONS: Maximum gains in oral health are likely to be achieved by a reorientation of Commonwealth subsidies towards preventive and basic treatment services. This reorientation needs to occur within a primary health care framework. Whereas the Commonwealth plays a national leadership role in the provision of general health services, this is not apparent in relation to oral health. This lack of leadership leaves many vulnerable Australians without basic preventive services and at high risk of losing teeth that might otherwise have been preserved. Channelling the funding now used to subsidise private dental services for the well off and dentally healthy to community-wide and targeted preventive services for vulnerable and low-income Australians would have a larger impact on oral health and represent a more equitable use of these funds.