Associate Professor David Newby

Background and Objectives: The US Preventative Services Taskforce recommends screening adults for depression in primary care where adequate systems are established to ensure accurate diagnosis, effective treatment and follow-up. However, there is currently no consensus on which screening tool is most suitable for use in primary healthcare. We aim to systematically review the literature for operating characteristics of depression screening tools capable of self-administration in primary healthcare and meta-analyse the psychometric characteristics of these tools to determine their performance and accuracy. Methods: An electronic literature search of EMBASE, Medline and CINAHL Complete was conducted from January 1982 to September 15, 2019 using the keywords: depression, screening, primary healthcare and adult. General and psychometric characteristics were extracted for screening tools studied in primary healthcare only when assessed against a 'reference-standard'. Results: Eighty-one studies from 22 countries were included in the review. Forty unique depression screening tools suitable for self-administration were identified in studies yielding 138 psychometric data sets. Based on ease of administration, 18 screening tools were suitable for use in primary healthcare. Of the tools meta-analysed, only the PHQ-9 and WHO-5 displayed superior accuracy and were easily administered. Conclusion: Although numerous depression screening tools are suitable for use in primary care based on ease of administration, the PHQ-9 was the most widely assessed tool and displayed superior DOR, a-ROC, specificity and LR +. Our review supports the use of the PHQ-9 as a brief, easily administered depression screening tool with superior discriminatory performance and robust psychometric characteristics in primary care settings.

Objectives: To examine the effectiveness of different strategies for recruiting participants for a large Australian randomised controlled trial (RCT), the Australian Study for the Prevention through Immunisation of Cardiovascular Events (AUSPICE). Design, setting, participants: Men and women aged 55¿60 years with at least two cardiovascular risk factors (hypertension, hypercholesterolaemia, overweight/obesity) were recruited for a multicentre placebo-controlled RCT assessing the effectiveness of 23-valent pneumococcal polysaccharide vaccine (23vPPV) for preventing cardiovascular events. Methods: Invitations were mailed by the Australian Department of Human Services to people in the Medicare database aged 55¿60 years; reminders were sent 2 weeks later. Invitees could respond in hard copy or electronically. Direct recruitment was supplemented by asking invitees to extend the invitation to friends and family (snowball sampling) and by Facebook advertising. Main outcome: Proportions of invitees completing screening questionnaire and recruited for participation in the RCT. Results: 21¿526 of 154¿992 invited people (14%) responded by completing the screening questionnaire, of whom 4725 people were eligible and recruited for the study. Despite the minimal study burden (one questionnaire, one clinic visit), the overall participation rate was 3%, or an estimated 10% of eligible persons. Only 16% of eventual participants had responded within 2 weeks of the initial invitation letter (early responders); early and late responders did not differ in their demographic or medical characteristics. Socio-economic disadvantage did not markedly influence response rates. Facebook advertising and snowball sampling did not increase recruitment. Conclusions: Trial participation rates are low, and multiple concurrent methods are needed to maximise recruitment. Social media strategies may not be successful in older age groups. Trial registration: Australian New Zealand Clinical Trials Registry, ACTRN12615000536561.

Objectives: To identify factors influencing Australian consumer decision-making and attitudes towards non-prescription medicine (NPM) purchases, pharmacy's role in providing these medications and views around sources of evidence for effectiveness of these products. Methods: Cross-sectional survey of a general population sample of 1731 adults using an Australian online consumer panel stratified by gender, age and location (State/Territory). Beliefs about NPM purchases and evidence of their efficacy were assessed using a 5-point Likert scale (strongly disagree-strongly agree). Non-parametric measures (Ridit analysis and Mann¿Whitney U-test) were used to explore associations between responses and previous experience with medicines. Key findings: The most important factors when purchasing NPMs were effectiveness and safety. However, personal experience was the most common method of determining effectiveness. Most respondents believed buying NPMs in pharmacies gave access to advice, but were less likely to agree that pharmacies were associated with safe and effective treatments. Around half the respondents agreed that it is wrong to sell treatments lacking scientific evidence; many also agreed that it is up to consumers to decide what they want even without scientific evidence. Individuals experiencing an ineffective NPM were less likely to trust scientific evidence of efficacy as the sole source of effectiveness information; regular prescription medicine users often agreed that scientific evidence is needed to support effectiveness. Conclusions: Consumers have conflicting views regarding the need for scientific evidence and the desire for patient autonomy in NPM purchases. This presents a challenge for pharmacists wishing to maintain professional obligations to provide evidence-based treatments to consumers.

Background: The pneumococcal polysaccharide vaccine (PPV) has been associated with reduced risk of cardiovascular events in human observational studies. Animal studies suggest that the phosphorylcholine epitope in the Streptococcus pneumoniae cell wall is structurally similar to oxidized low-density lipoprotein (oxLDL), hence PPV induces the production of antibodies that cross-react with anti-oxLDL and may cause regression of atherosclerotic plaque. We set out to determine the strength of association between PPV administration and reduction in cardiovascular events. Methods: A longitudinal, population-based cohort study of older Australians, from the Hunter Community Study, with up to 11 years of follow-up. We included participants aged = 65 years at baseline (2004¿2008), without a history of cardiovascular disease (CVD). History of PPV administration at baseline was the main exposure of interest. "Total number of hospital bed-days with CVD primary diagnosis" was one of the main outcomes measured. Models were adjusted for age, diabetes, alcohol intake, and smoking status. Influenza vaccine was the control exposure used and fracture bed-days was the control outcome used, to investigate the potential for residual confounding. Results: 91 of the total 1074 participants (mean age = 72, male = 45%) experienced a CVD event during follow-up. PPV (regardless of influenza vaccine) was associated with a significant reduction in CVD bed-day, (n = 863, incident rate ratio, IRR = 0.65, 95%CI: 0.45¿0.94, p = 0.02), but influenza vaccine (regardless of PPV) was not (n = 864, IRR = 0.86, 95%CI: 0.54¿1.35, p = 0.51). Furthermore, PPV adjusted for influenza vaccine remained associated with CVD bed-days (IRR = 0.64, 95%CI: 0.43¿0.96, p = 0.03) but was not associated with fracture bed-days (IRR = 0.75, 95%CI: 0.28¿2.00, p = 0.56). Conclusion: PPV demonstrated a 35% reduction in CVD bed-days. This finding was robust to residual confounding, using a control exposure and a control outcome, eliminating the concern for healthy-user bias. A large double-blinded placebo-controlled RCT is underway to confirm our finding and to explore the proposed mechanism of action (ACTRN12615000536561).

Objective: To evaluate the feasibility of providing diabetes risk assessment at community pharmacy level in Australia and Thailand from organizational aspects. Methods: The intervention study was conducted in eight community pharmacies in New South Wales, Australia, and six community pharmacies in Central Thailand. Diabetes risk assessment tools were applied to determine the risk of developing type 2 diabetes. An open-ended question was asked to solicit the willingness-to-pay value for the service. A semistructured interview was conducted with participating pharmacists to solicit the perceived facilitators and barriers in providing the service. Results: There were a total of 132 and 185 participants, with the ratio of participants in the three risk categories of low, intermediate, and high being 1:4:11 and 2:1:1.5 for Australia and Thailand, respectively. More Thai participants were willing to pay for the service (72.4% vs. 18.9%; P = 0.0001). Pharmacists from both countries agreed that providing risk assessment would increase health awareness and assist in dampening the burden of disease. A major barrier is time and staff shortage. Support from the government and collaboration among health care providers were major facilitators from Thai pharmacists' perspective, whereas remuneration was a major facilitator from Australian pharmacists' perspective. Conclusions: Pharmacists in both countries agreed that this intervention would contribute to produce positive health benefits. Differences in advantages and barriers as well as in the proportion of consumers willing to pay for the service demonstrated that it is essential for pharmacists (particularly in developing countries) to be aware of the pitfalls of copying practice initiatives in developed countries without any consideration of the local health care environment.