Testing the Impact of Variations in Administration on the Kessler Psychological Distress Scale (K10).

Self-report measures are useful in psychological research and practice, but scores may be impacted by administration methods. This study investigated whether changing the recall period (from 30 to 7 days) and response option order (from ascending to descending) alters the score distribution of the Kessler Psychological Distress Scale (K10). Participants were presented with the K10 with either different recall periods or different response option orders. There was weak evidence of lower mean K10 scores when using a 7-day recall period than when using the 30-day recall period (B = 1.96, 95% CI [0.04-3.90]) but no evidence of a change in the estimated prevalence of very high psychological distress. Presenting the response options in ascending order did not affect mean scores, but there was weak evidence of reduced prevalence of very high distress relative to the descending order (incidence rate ratio [IRR] = 0.60, 95% CI [0.36-0.98]). These findings suggest that varying the administration method may result in minor differences in population estimates of very high psychological distress when using the K10.

Investigating the association between work family conflict (WFC) and generalized anxiety disorder (GAD) in an Australian community-based cohort study.

PURPOSE: Difficulties managing work and family demands are common and have been found to be associated with stress and poor mental health. However, very few studies have examined Work Family Conflict (WFC) in connection with diagnosable anxiety disorders (and none with Australian representative data). The current study investigated whether high WFC was significantly associated with a diagnosis of Generalised Anxiety Disorder (GAD) after controlling for a broad range of socio-demographic contextual factors, related psychosocial job, family and individual characteristics, and prior anxiety symptom history. METHODS: Data was analysed from an Australian population-based community cohort - the Personality and Total Health (PATH) Through Life project. Eligible participants (N = 1159) were employed full-time or part-time, with data collected by both online questionnaire and face-to-face interview. Presence of Generalised Anxiety Disorder (GAD) in the past 12-months was diagnosed by the GAD module in the Composite International Diagnostic Interview (CIDI) (based on DSM-IV criteria) and severe anxiety symptoms were measured using the Patient Health Questionnaire (PHQ) 7-item 'other anxiety' model. RESULTS: The findings consistently showed that those experiencing high WFC had higher odds of a GAD diagnosis (final adjusted model: CIDI: OR: 2.55, CI: 1.38-4.70) as well as clinical levels of anxiety symptoms (PHQ: OR:2.61, CI:1.44,4.72). This was the case after controlling for an extensive range of covariates. CONCLUSIONS: This is one of the first studies to show that WFC is associated with greater likelihood of GAD. The challenge of juggling both work and family can have far-reaching impacts - not just increasing distress broadly, but also potentially increasing the likelihood of clinically diagnosable anxiety.

Neural correlates of the revised reinforcement sensitivity theory: A cross-sectional structural neuroimaging study in middle-aged adults.

The revised reinforcement sensitivity theory (RST) proposes that neurobiological systems control behavior: the fight-flight-freeze (FFFS) for avoidance of threat; behavioral approach/activation (BAS) for approach to rewards; and behavioral inhibition (BIS) for conflict resolution when avoidance and approach are possible. Neuroimaging studies have confirmed some theoretical associations between brain structures and the BAS and BIS; however, little representative population data are available for the FFFS. We investigated the neural correlates of the revised RST in a sample of 404 middle-aged adults (Mage = 47.18 (SD = 1.38); 54.5% female). Participants underwent structural magnetic resonance imaging and completed health questionnaires and the BIS/BAS/FFFS scales. We used multiple regression analyses to investigate the association between scale scores and volumes of a priori theoretically linked regions of interest while controlling for sex, age, intracranial volume, and cardio-metabolic variables; and conducted exploratory analyses on cortical thickness. The BIS was negatively associated with hippocampus laterality. At standard significance levels, the fear component of the FFFS was positively associated with anterior cingulate cortex; the BAS was positively associated with bilateral caudate; and the BIS was positively associated with posterior cingulate cortex volume. Furthermore, these neurobiological systems showed distinct patterns of association with cortical thickness though future work is needed. Our results showed that the neurobiological systems of the revised RST characterized in rodents can also be identified in the human brain.

Comparing estimates of psychological distress using 7-day and 30-day recall periods: Does it make a difference?

Self-report measures are widely used in mental health research and may use different recall periods depending on the purpose of the assessment. A range of studies aiming to monitor changes in mental health over the course of the COVID-19 pandemic opted to shorten recall periods to increase sensitivity to change over time compared to standard, longer recall periods. However, many of these studies lack pre-pandemic data using the same recall period and may rely on pre-existing data using standard recall periods as a reference point for assessing the impact of the pandemic on mental health. The aim of this study was to assess whether comparing scores on the same questionnaire with a different recall period is valid. A nationally representative sample of 327 participants in Australia completed a 7-day and 30-day version of the six-item Kessler Psychological Distress Scale (K6) and a single-item measure of psychological distress (TTPN item) developed for the Taking the Pulse of the Nation survey. Linear mixed models and mixed logistic regression models were used to assess whether altering the recall period systematically changed response patterns within subjects. No substantive recall period effects were found for the K6 or the TTPN, although there was a trend towards higher K6 scores when asked about the past 30 days compared to the past 7 days (b = 1.00, 95% CI: -0.18, 2.17). This may have been driven by the "feeling nervous" item which was rated higher using the 30-day compared to the 7-day recall period. Neither the K6 nor the TTPN item were significantly affected by the recall period when reduced to a binary variable of likely severe mental illness. The results indicate that altering the recall period of psychological distress measures does not substantively alter the score distribution in the general population of Australian adults.

Generational differences in mental health trends in the twenty-first century.

Given the observed deterioration in mental health among Australians over the past decade, this study investigates to what extent this differs in people born in different decades-i.e., possible birth cohort differences in the mental health of Australians. Using 20 y of data from a large, nationally representative panel survey (N = 27,572), we find strong evidence that cohort effects are driving the increase in population-level mental ill-health. Deteriorating mental health is particularly pronounced among people born in the 1990s and seen to a lesser extent among the 1980s cohort. There is little evidence that mental health is worsening with age for people born prior to the 1980s. The findings from this study highlight that it is the poorer mental health of Millennials that is driving the apparent deterioration in population-level mental health. Understanding the context and changes in society that have differentially affected younger people may inform efforts to ameliorate this trend and prevent it continuing for emerging cohorts.

How the mental health of working parents in Australia changed during COVID-19: A pre- to during pandemic longitudinal comparison.

BACKGROUND: Cross-sectional studies indicate that mental health has deteriorated in Australia during the COVID-19 pandemic, including for parents. However, robust longitudinal studies interrogating change from before to during the pandemic remain rare. The current study analysed data from Australian parents surveyed in 2016 and August 2020. We investigate whether distress was higher in the COVID-19 period compared to pre-pandemic levels, and whether any increases in distress were greatest for parents living in Victoria (who had entered their second prolonged lockdown). METHODS: A community cohort of Australian working parents (n = 5197) was recruited online in 2016. In August 2020, 25.9 % (n = 1348) completed a follow-up survey. Analyses were restricted to those employed at both time-points (n = 1311). Random effects longitudinal models examined the association between time (i.e. pre vs. during-pandemic) and distress (K6 scale). Fixed effects models specifically tested change between time periods in association with change in distress. LIMITATIONS: The initial sample were recruited online with highly educate parents over-represented. Attrition between survey time-points may also limit generalisability. RESULTS: All models consistently showed that the pandemic period was associated with greater distress. Overall, serious mental illness (i.e. K6 score ≥ 18) increased by 5.3 percentage points (from 8.0 to 13.3). This increase was greater (by 4.7 percentage points) for those parents in Victoria. CONCLUSIONS: This study is one of few to longitudinally assess mental health pre- to during the pandemic. Psychological distress and serious mental illness increased for Australian working parents, and this effect was greatest for those experiencing a prolonged lockdown in Victoria.

Trajectories of psychological distress over multiple COVID-19 lockdowns in Australia.

The impact of the global COVID-19 pandemic, including the indirect effect of policy responses, on psychological distress has been the subject of much research. However, there has been little consideration of how the prevalence of psychological distress changed with the duration and repetition of lockdowns, or the rate of resolution of psychological distress once lockdowns ended. This study describes the trajectories of psychological distress over multiple lockdowns during the first two years of the pandemic across five Australian states for the period May 2020 to December 2021 and examines whether psychological distress trajectories varied as a function of time spent in lockdown, or time since lockdown ended. A total of N = 574,306 Australian adults completed Facebook surveys over 611 days (on average 940 participants per day). Trajectories of psychological distress (depression and anxiety) were regressed on lockdown duration and time since lockdown ended. Random effects reflecting the duration of each lockdown were included to account for varying effects on psychological distress associated with lockdown length. The prevalence of psychological distress was higher during periods of lockdown, more so for longer lockdowns relative to shorter lockdowns. Psychological distress increased rapidly over the first ten weeks of lockdowns spanning at least twelve weeks, though less rapidly for short lockdowns of three weeks or less. Psychological distress levels tended to stabilise, or even decrease, after ten consecutive weeks of lockdown. After lockdown restrictions were lifted, psychological distress rapidly subsided but did not return to pre-lockdown levels within four weeks, although continued to decline afterwards. In Australia short lockdowns of pre-announced durations were associated with slower rises in psychological distress. Lockdowns may have left some temporary residual population effect, but we cannot discern whether this reflects longer term trends in increasing psychological distress. However, the findings do re-emphasise the resilience of individuals to major life stressors.

Poor psychosocial job conditions increase sickness absence: evidence from the PATH Through Life Mid-Aged Cohort.

OBJECTIVES: Evidence is mounting that poor psychosocial job conditions increase sickness absence, but there is a need for further rigorous prospective research to isolate the influence of psychosocial job quality from other measured and unmeasured confounders. This study used four waves of prospective longitudinal data (spanning 12 years) to investigate the extent to which increases in poor psychosocial job quality are associated with greater relative risk of day of sickness absence. DESIGN: Prospective cohort study. SETTING: Data were from the Australian PATH Through Life cohort study. The analyses adopted hybrid-regression estimations that isolated the effect of within-person change in psychosocial job quality on sickness absence over time. PARTICIPANTS: Participants were from a midlife cohort aged 40-44 at baseline (7644 observations from 2221 participants). PRIMARY OUTCOME MEASURE: Days sickness absence in the past 4 weeks. RESULTS: The results show that after adjusting for a wide range of factors as well as unmeasured between-person differences in job quality, each additional psychosocial job adversity was associated with a 12% increase in the number of days of sickness absence (relative risk ratio: 1.12, 95% CI 1.03 to 1.21). Increases in psychosocial job adversity were also related to greater functional impairment (relative risk ratio: 1.17 (1.05 to 1.30)). CONCLUSION: The results of this study strengthen existing research highlighting the importance of addressing poor psychosocial job quality as a risk factor for sickness absence.

Protecting mental health during periods of financial stress: Evidence from the Australian Coronavirus Supplement income support payment.

This paper investigates whether the Australian government's Coronavirus Supplement, a temporary income support payment for unemployed jobseekers during the height of the COVID-19 pandemic, protected mental health (frequency of feeling anxious or depressed during the past week) by lowering financial stress (how comfortable people are in paying for essential services). We use unique nationally representative repeated cross-sectional data on 3843 unemployed Australian adults over the period April 6, 2020 to May 10, 2021. We find that the Coronavirus Supplement payment significantly reduced reported financial stress, and lower financial stress was associated with lower mental distress. Though the Coronavirus Supplement was designed to reduce financial stress, we find the Supplement was also successful in protecting community mental health indirectly via its ability to reduce financial stress. The findings provide support for income support packages to protect mental health during economic shocks. However, transitory support measures also tend have short-lived positive effects on mental health, suggesting that more permanent income support reform may have longer-term mental health benefits.

Unencumbered and still unequal? Work hour - Health tipping points and gender inequality among older, employed Australian couples.

Could working into older age offer women an opportunity to 'catch up' their careers and redress their financial disadvantage in retirement? This is a period of relative 'unencumbrance' from childrearing, potentially freeing women's time for more paid work. Here, we examine whether women aged 50 to 70 are able to increase their workhours, and what happens to their mental health, vitality and wealth. We used a representative household-based panel of employed older Australians (the HILDA survey). The longitudinal bootstrapped 3SLS estimation technique adjusted for reciprocal relationships between wages, workhours, and health, modelled in the context of domestic work time. We found that, relative to their same-aged male counterparts, older women spent 10 h more each week on domestic work, and 9 h less on work that earned income. When women sought to add more paid hours on top of their unpaid hours, their mental health and vitality were impaired. Men were typically able to maintain their workhours and health advantage by spending fewer hours each week on domestic work. Unable to work longer without trading-off their health, and paid less per hour if they did so, our analysis questions whether working into older age offers women a road out of inequality and disadvantage.

Effect of lockdown on mental health in Australia: evidence from a natural experiment analysing a longitudinal probability sample survey.

BACKGROUND: Many studies have examined population mental health during the COVID-19 pandemic but have been unable to isolate the direct effect of lockdowns. The aim of this study was to examine changes in the mental health of Australians aged 15 years and older during the COVID-19 pandemic using a quasi-experimental design to disentangle the lockdown effect. METHODS: We analysed data from ten annual waves (2011-20) of the longitudinal Household, Income and Labour Dynamics in Australia (HILDA) Survey to identify changes in the mental health of respondents from the pre-COVID-19 period (2011-19) to the COVID-19 period (2020). Difference-in-differences models were used to compare these changes between respondents in the state of Victoria who were exposed to lockdown at the time of the 2020 interviews (treatment group) and respondents living elsewhere in Australia (who were living relatively free of restrictions; control group). The models included state, year (survey wave), and person-specific fixed effects. Mental health was assessed using the five-item Mental Health Inventory (MHI-5), which was included in the self-complete questionnaire administered during the survey. FINDINGS: The analysis sample comprised 151 583 observations obtained from 20 839 individuals from 2011 to 2020. The treatment group included 3568 individuals with a total of 37 578 observations (34 010 in the pre-COVID-19 and 3568 in the COVID-19 period), and the control group included 17 271 individuals with 114 005 observations (102 867 in the pre-COVID-19 and 11 138 in the COVID-19 period). Mean MHI-5 scores did not differ between the treatment group (72·9 points [95% CI 72·8-73·2]) and control group (73·2 points [73·1-73·3]) in the pre-COVID-19 period. In the COVID-19 period, decreased mean scores were seen in both the treatment group (69·6 points [69·0-70·2]) and control group (70·8 points [70·5-71·2]). Difference-in-differences estimation showed a small but statistically significant effect of lockdown on MHI-5 scores, with greater decline for residents of Victoria in 2020 than for those in the rest of Australia (difference -1·4 points [95% CI -1·7 to -1·2]). Stratified analyses showed that this lockdown effect was larger for females (-2·2 points [-2·6 to -1·7]) than for males (-0·6 [-0·8 to -0·5]), and even larger for women in couples with children younger than 15 years (-4·4 points [-5·0 to -3·8]), and for females who lived in flats or apartments (-4·1 points [-5·4 to -2·8]) or semi-detached houses, terraced houses, or townhouses (-4·8 points [-6·4 to -3·2]). INTERPRETATION: The imposition of lockdowns was associated with a modest negative change in overall population mental health. The results suggest that the mental health effects of lockdowns differ by population subgroups and for some might have exaggerated existing inequalities in mental health. Although lockdowns have been an important public health tool in suppressing community transmission of COVID-19, more research is needed into the potential psychosocial impacts of such interventions to inform their future use. FUNDING: US National Institutes of Health.

Does receipt of unemployment benefits change recruiter perceptions of candidates' personality, work relevant skills and employability?

BACKGROUND: Growing experimental evidence shows that unemployment benefit recipients are generally perceived negatively in terms of their personality and employability by the general public. Welfare stigma tied to unemployment or receipt of income support may disproportionately negatively impact individuals who have been out of work due to disability, or chronic health conditions. OBJECTIVE: The current study examined whether welfare stigma and/or unemployment stigma, translate to perceptions and hiring decisions made by individuals working in recruitment, potentially creating barriers to re-employment for those without work and relying on unemployment benefits. METHODS: We used a vignette-based experiment (N = 213) where participants working in recruitment rated personality and employment capabilities of characters who were described as employed, unemployed or unemployed and receiving benefits. RESULTS: Characters who were employed were generally rated more positively on employability and work-relevant skills, compared to the unemployed and unemployed benefit recipients, but these differences did not translate into a binary hiring decision (would you hire this person for the job). There were few differences in ratings of personality characteristics between the employed, the unemployed and those who were receiving unemployment benefits. CONCLUSIONS: These results add to knowledge about the determinants of welfare stigma showing that potential bias towards the unemployed and benefit recipients held by recruiters differs from that held by the general public.

How many children are exposed to at-risk parental gambling in Australia? Results from a representative national sample.

Children of problem gamblers are at risk of harm, however, there are no population level estimates as to how many children are currently exposed to parental problem- and at-risk gambling. The current study analysed data from the Household, Income and Labour Dynamics in Australia (HILDA) Survey, a nationally representative survey, to derive the first ever national estimates of the proportion of problem, moderate, and low risk gamblers (as measured by PGSI) in the Australian parent population. It also reports how many children under 15 years of age in Australia are exposed to parental gambling across the gambling risk categories. The results show that 13.7% of all Australian families with dependent children are currently exposed to some level of gambling risk due to parental gambling, and nearly 4% of families with children are exposed to parental moderate risk or problem gambling. This corresponds to almost 200,000 children each year. The results and approach of this study will guide future examination of child wellbeing in families where parents experience problems with gambling. The results are discussed in the context of public health approaches to familial gambling harm.

Enzyme kinetic approach for mechanistic insight and predictions of in vivo starch digestibility and the glycaemic index of foods.

BACKGROUND: Starch is a principal dietary source of digestible carbohydrate and energy. Glycaemic and insulinaemic responses to foods containing starch vary considerably and glucose responses to starchy foods are often described by the glycaemic index (GI) and/or glycaemic load (GL). Low GI/GL foods are beneficial in the management of cardiometabolic disorders (e.g., type 2 diabetes, cardiovascular disease). Differences in rates and extents of digestion of starch-containing foods will affect postprandial glycaemia. SCOPE AND APPROACH: Amylolysis kinetics are influenced by structural properties of the food matrix and of starch itself. Native (raw) semi-crystalline starch is digested slowly but hydrothermal processing (cooking) gelatinises the starch and greatly increases its digestibility. In plants, starch granules are contained within cells and intact cell walls can limit accessibility of water and digestive enzymes hindering gelatinisation and digestibility. In vitro studies of starch digestion by α-amylase model early stages in digestion and can suggest likely rates of digestion in vivo and expected glycaemic responses. Reports that metabolic responses to dietary starch are influenced by α-amylase gene copy number, heightens interest in amylolysis. KEY FINDINGS AND CONCLUSIONS: This review shows how enzyme kinetic strategies can provide explanations for differences in digestion rate of different starchy foods. Michaelis-Menten and Log of Slope analyses provide kinetic parameters (e.g., K m and k cat /K m ) for evaluating catalytic efficiency and ease of digestibility of starch by α-amylase. Suitable kinetic methods maximise the information that can be obtained from in vitro work for predictions of starch digestion and glycaemic responses in vivo.

Evaluating How Mental Health Changed in Australia through the COVID-19 Pandemic: Findings from the 'Taking the Pulse of the Nation' (TTPN) Survey.

The COVID-19 pandemic has had a significant impact on mental health at the level of the population. The current study adds to the evidence base by examining how the prevalence of psychological distress changed in Australia during the pandemic. The study also assesses the psychometric properties of a new single-item measure of mental distress included in a survey program conducted regularly throughout the pandemic. Data are from 1158 respondents in wave 13 (early July 2020) of the nationally representative Taking the Pulse of the Nation (TTPN) Survey. The questionnaire included the six-item Kessler Psychological Distress Scale (K6) and a new single-item measure of distress. Results show a significant increase in the prevalence of psychological distress in Australia, from 6.3% pre-pandemic to 17.7% in early July 2020 (unadjusted odds ratio = 3.19; 95% CI (confidence interval) = 2.51 to 4.05). The new single-item measure of distress is highly correlated with the K6. This study provides a snapshot at one point in time about how mental health worsened in Australia during the COVID-19 pandemic. However, by demonstrating the accuracy of the new single-item measure of distress, this analysis also provides a basis for further research examining the trajectories and correlates of distress in Australia across the pandemic.

DSM-5 and ICD-11 alcohol use disorder criteria in young adult regular drinkers: Lifetime prevalence and age of onset.

BACKGROUND: Alcohol Use Disorder (AUD) is a significant contributor to global disease burden. AUD has a relatively early onset during young adulthood (Teesson et al., 2010). However, compared to AUD in adults, we have relatively little understanding of AUD in adolescents and emerging adults. METHODS: The RADAR study is a prospective cohort study designed to investigate the emergence of AUD in community-dwelling adolescents and emerging adults across Australia (age range = 18-21 at baseline). At 6 monthly intervals over 2.5 years, participants were interviewed regarding alcohol consumption and alcohol use disorder criteria by clinical psychologists using the SCID-IV-RV. This paper reports the baseline findings of the RADAR cohort. RESULTS: Proportions of lifetime criteria endorsement among regular drinkers varied considerably. Tolerance was the most endorsed criterion (50.3%), followed by Social Problems (10.4%) and Larger/Longer (9.0%). The median age of onset for most individual AUD criteria was 18 years of age. 18.4% of our cohort met DSM-5 AUD diagnosis in their lifetime to date, and 16.8% met ICD-11 dependence. When removing Tolerance from the AUD criteria, DSM-5 AUD lifetime prevalence reduced to 11.0%, and ICD-11 AUD lifetime prevalence fell to 7.1% in our cohort. CONCLUSIONS: Variable rates of criteria endorsement likely reflect both true differences in the experience of AUD criteria and methodological challenges in the assessment of AUD in an emerging adult age group. High rates of tolerance to the effects of alcohol, and relatively low rates of drinking larger/longer than intended are discussed considering methodological challenges in assessing these criteria in young adults.

Structure-function studies of chickpea and durum wheat uncover mechanisms by which cell wall properties influence starch bioaccessibility.

Positive health effects of dietary fibre have been established; however, the underpinning mechanisms are not well understood. Plant cell walls are the predominant source of fibre in the diet. They encapsulate intracellular starch and delay digestive enzyme ingress, but food processing can disrupt the structure. Here we compare digestion kinetics of chickpea (cotyledon) and durum wheat (endosperm), which have contrasting cell wall structures (Type I and II, respectively), to investigate a 'cell-wall barrier' mechanism that may underpin the health effects of dietary fibre. Using in vitro models, including the Dynamic Gastric Model, to simulate human digestion together with microscopy, we show that starch bioaccessibility is limited from intact plant cells and that processing treatments can have different effects on cell integrity and digestion kinetics when applied to tissues with contrasting cell wall properties. This new understanding of dietary fibre structure is important for effective fibre supplementation to benefit human health.

How does working nonstandard hours impact psychological resources important for parental functioning? Evidence from an Australian longitudinal cohort study.

This study investigates the link between nonstandard schedules and three psychological resources salient to working parents' parental functioning (psychological distress, work-family conflict and relationship quality). Data from fathers and mothers are analysed separately, using a nationally representative sample of dual-earner parents (6190 observations from 1915 couples) drawn from the Longitudinal Study of Australian Children (LSAC). The LSAC data was collected between 2008 and 2018 (with data collected every two years). Hybrid analysis models were conducted to identify within-person changes in these psychological resources in association with moving in and out of nonstandard work schedules, as well as between-person differences between parents working standard hours and nonstandard hours. The results indicate that the connections between working nonstandard schedules and the psychological resources were patterned differently across genders. No significant differences in psychological distress were found between those working nonstandard schedules and those working standard schedules for either fathers or mothers. Fathers working nonstandard schedules had higher work-family conflict compared to fathers working standard schedules, while no such effect found for mothers. This effect for fathers was largely explained by other characteristics related to working a nonstandard schedule, rather than the schedule itself. For fathers (but not mothers), working nonstandard schedules was significantly, and potentially causally, associated with lower relationship quality (i.e. within-person effects were found). Additional supplementary analyses found the connections between work schedules and psychological resources varied somewhat across different types of schedules (i.e. evening/night shift, rotating shift and irregular shift). As one of the first nationally representative longitudinal studies to explore changes in work schedules in association with changes in parents' psychosocial resources, the impacts for fathers (particularly relationship quality) are an important line for future enquiry.

The accuracy of self-reported physical activity questionnaires varies with sex and body mass index.

BACKGROUND: Factors contributing to the accurate measurement of self-reported physical activity are not well understood in middle-aged adults. We investigated the associations between two self-reported surveys and objectively measured physical activity in middle-aged adults, and the influence of individual and sociodemographic factors on these associations, at different intensities utilizing an observational study design. METHODS: Participants (n = 156) wore a SenseWear Armband™ (SWA) for a continuous seven-day period over the triceps of the left arm, to measure energy expenditure in metabolic equivalents. Participants also completed the Physical Activity Recall questionnaire (PAR) and Active Australia Survey (AAS). Associations were analyzed separately in general linear models for each intensity. The influence of individual and sociodemographic factors was assessed through moderator analyses. RESULTS: The PAR and SWA were significantly positively associated at moderate (ß = 0.68, 95% CI 0.16-1.20), vigorous (ß = 0.36, 95% CI 0.20-0.53), moderate-to-vigorous physical activity (MVPA) (ß = 0.52, 95% CI 0.20-0.83), and total METmins (ß = 0.63, 95% CI 0.35-0.90), the AAS and SWA were associated at all intensities (moderate (ß = 0.41, 95% CI 0.15-0.67), vigorous (ß = 0.32, 95% CI 0.19-0.46), MVPA (ß = 0.42, 95% CI 0.18-0.65) and total METmins (ß = 0.62, 95% CI 0.29-0.96). A significant interaction between the PAR and sex for vigorous-intensity unveiled a weaker association in women. Both surveys tended to under-report physical activity. The largest margins of error were present at light and moderate intensities. For the PAR, participants reported over 20 hours, or 69% less light physical activity than recorded by the SWA per week. For the AAS, participants reported over 7 hours, or 38% less moderate physical activity. Compared to lighter intensities, time spent at a vigorous intensity was overreported by participants with the PAR and AAS by 91 and 43 minutes per week, respectively. The addition of Body Mass Index (BMI) resulted in non-significant interactions between the PAR and SWA for moderate-intensity, and the AAS and SWA for vigorous-intensity; a significant interaction between AAS and BMI indicated that the strength of the association differed by BMI for vigorous-intensity. CONCLUSIONS: The PAR and AAS are not equivalent to the SWA, and sex and BMI may alter the associations between the measures.