Systematic review and meta-analysis of prognostic characteristics for breast cancers in populations with digital versus film mammography indicate the transition may have increased both early detection and overdiagnosis.

OBJECTIVE: Film mammography has replaced digital mammography in breast screening programs globally. This led to a small increase in the rate of detection, but whether the detection of clinically important cancers increased is uncertain. We aimed to assess the impact on tumour characteristics of screen-detected and interval breast cancers. STUDY DESIGN AND SETTING: We searched seven databases from inception to 08 October 2023 for publications comparing film and digital mammography within the same population of asymptomatic women at population (average) risk of breast cancer. We recorded reported tumour characteristics and assessed risk of bias using the ROBINS-I tool. We synthesized results using meta-analyses of random effects. RESULTS: Eighteen studies were included in the analysis from 8 countries, including 11,592,225 screening examinations (8,117,781 film; 3,474,444 digital). There were no differences in tumour size, morphology, grade, node status, receptor status, or stage in the pooled differences for screen-detected and interval invasive cancer tumour characteristics. There were statistically significant increases in screen-detected DCIS across all grades: 0.05 (0.00-0.11), 0.14 (0.05-0.22), and 0.19 (0.05-0.33) per 1,000 screens for low, intermediate, and high grade DCIS respectively. There were similar (non-statistically significant) increases in screen-detected invasive cancer across all grades. CONCLUSION: The increased detection of all grades of DCIS and invasive cancer may indicate both increased early detection of more aggressive disease and increased overdiagnosis. FUNDING: Australian National Health and Medical Research Council and the National Breast Cancer Foundation. REGISTRATION: PROSPERO 2017:CRD42017070601.

Breast Cancer Stage and Size Detected with Film versus Digital Mammography in New South Wales, Australia: A Population-Based Study Using Routinely Collected Data.

BACKGROUND: Digital mammography has replaced film mammography in breast-screening programs globally, including Australia. This led to an increase in the rate of detection, but whether there was increased detection of clinically important cancers is uncertain. METHODS: In this population-wide retrospective cohort study in New South Wales, Australia spanning 2004 to 2016 and including 4,631,656 screens, there were 22,965 cancers in women screened with film (n = 11,040) or digital mammography (n = 11,925). We examined the change in tumor characteristics overall and how these rates changed over time, accounting for changes in background rates using an interrupted time-series. Comparisons were made with unscreened women (n = 26,326) during this time. RESULTS: We found increased detection of in situ cancer (3.36 per 10,000 screens), localized invasive, and smaller-sized breast cancers attributable to the change in mammography technology, whereas screen-detected intermediate-sized and metastatic breast cancers decreased. Rates of early-stage and intermediate-sized interval cancers increased, and late-stage (-1.62 per 10,000 screens) and large interval cancers decreased. In unscreened women, there were small increases in the temporal trends of cancers across all stages. CONCLUSIONS: At least some of the increased detection of smaller early-stage cancers may have translated into a reduction in larger and late-stage cancers, indicating beneficial detection of cancers that would have otherwise progressed. However, the increased detection of smaller early-stage and small cancers may also have increased over-diagnosis of lesions that would otherwise have not caused harm. IMPACT: Robust evaluation of potential benefits and harms is needed after changes to screening programs. See related In the Spotlight, p. 638.

Impact of policy changes of Medicare-rebated telehealth services on medical abortions provided at a family planning service during the coronavirus (COVID-19) pandemic.

This study reviewed data on the mode of delivery of medical abortion care (via face-to-face or telehealth) at a Family Planning service during the coronavirus (COVID-19) pandemic; April 2020 to March 2022. This was considered over time, in the context of changing eligibility criteria for Medicare-rebated telehealth services as well as patient demographic data. The study demonstrated that when Medicare rebates for telehealth are available for all those requiring abortion care, telehealth contributes to care provision alongside face-to-face services, and is more likely to be utilised by people living in regional and remote areas.

Using health administrative data to model associations and predict hospital admissions and length of stay for people with eating disorders.

BACKGROUND: Eating disorders are serious mental illnesses requiring a whole of health approach. Routinely collected health administrative data has clinical utility in describing associations and predicting health outcome measures. This study aims to develop models to assess the clinical utility of health administrative data in adult eating disorder emergency presentations and length of stay. METHODS: Retrospective cohort study on health administrative data in adults with eating disorders from 2014 to 2020 in Sydney Local Health District. Emergency and admitted patient data were collected with all clinically important variables available. Multivariable regression models were analysed to explore associations and to predict admissions and length of stay. RESULTS: Emergency department modelling describes some clinically important associations such as decreased odds of admission for patients with Bulimia Nervosa compared to Anorexia Nervosa (Odds Ratio [OR] 0.31, 95% Confidence Interval [95%CI] 0.10 to 0.95; p = 0.04). Admitted data included more predictors and therefore further significant associations including an average of 0.96 days increase in length of stay for each additional count of diagnosis/comorbidities (95% Confidence Interval [95% CI] 0.37 to 1.55; p = 0.001) with a valid prediction model (R2 = 0.56). CONCLUSIONS: Health administrative data has clinical utility in adult eating disorders with valid exploratory and predictive models describing associations and predicting admissions and length of stay. Utilising health administrative data this way is an efficient process for assessing impacts of multiple factors on patient care and predicting health care outcomes.

Pathways to IUD and implant insertion in general practice: a secondary analysis of the ACCORd study.

BACKGROUND: Despite recommendations, long-acting reversible contraceptives (LARC) are not always offered as first-line contraceptives in general practice. This study aimed to describe pathways used by women for insertion of LARC. METHODS: This is a secondary analysis of data from the Australian Contraceptives ChOice pRoject (ACCORd), a cluster randomised controlled trial set in 57 general practices in Melbourne, Australia. We investigated whether an educational intervention for general practitioners (GPs) and a rapid LARC insertion clinic increased LARC uptake. The main outcome measures were the type of health service, location/provider of intrauterine device (IUD) insertion; time to insertion; and distance travelled for IUD insertion. RESULTS: During ACCORd, 149 women had LARC insertion. IUD training was reported by 37% of GPs, but only 12% inserted them. In contrast, 70% of GPs inserted implants and 95% of women accessed implant insertion through their own general practice. LARC rapid referral clinics were used by 52% (13/25) of intervention GPs, where 71% (41/56) of IUD insertions occurred in these clinics (but no implants). There was no difference in the mean time from referral to IUD insertion between women attending intervention and control GPs (mean days 37.6vs 32.7; P =0.61). GPs (including IUD inserters) used a variety of referral pathways for IUD insertion, including public and private clinics, and other GPs. Women travelled up to 90km for IUD insertion. CONCLUSIONS: Although implant insertion has been integrated into general practice, few GPs insert IUDs. Where the option exists for GPs to refer to a LARC rapid referral clinic, the majority of IUD insertions will take place there. Establishing a network of such clinics Australia wide may both increase IUD uptake and address the extensive need for GP training in IUD insertion.

Hypertensive retinopathy and cardiovascular disease risk: 6 population-based cohorts meta-analysis.

Background: The cardiovascular risk associated with different levels of hypertensive retinopathy, including mild, remains unclear. We performed an individual participant meta-analysis from 6 population-based cohort studies to determine the relationship of hypertensive retinopathy with incident cardiovascular outcomes. Methods: We identified cohort studies that objectively assessed hypertensive retinopathy from photographs, documented incident cardiovascular outcomes, and were population-based. Six studies contributed data from 11,013 individuals at baseline with 5-13 years follow-up. Participants were recruited if they had hypertension and did not have confounding conditions such as diabetic retinopathy. Main outcome measures were incident coronary heart disease (CHD), stroke and a composite endpoint of cardiovascular disease (CHD or stroke). Pooled estimates of incident risk ratios (IRR) were obtained after adjusting for age, gender, systolic blood pressure, serum total cholesterol, high density lipoprotein and smoking. Results: Among eligible participants with hypertension and without diabetes, there were 1018/9662 (10.5%) incident CHD events, 708/11,013 (6.4%) incident stroke events and 1317/9378 (14.0%) incident CVD events. Mild hypertensive retinopathy was associated with increased risk of CVD (IRR 1.13, 95% CI 1.00 to 1.27) and CHD (IRR 1.17, 95% CI 1.02 to 1.34) but not stroke; moderate hypertensive retinopathy was associated with increased risk of CVD (IRR 1.25 95% CI 1.02 to 1.53) but not stroke or CHD individually. Conclusions: In persons with hypertension, both mild and moderate hypertensive retinopathy were associated with higher CVD risk.

Carer preparedness improved by providing a supportive educational intervention for carers of patients with high-grade glioma: RCT results.

BACKGROUND: High-grade glioma (HGG) is a rapidly progressing and debilitating disease. Family carers take on multiple responsibilities and experience high levels of distress. We aimed to deliver a nurse-led intervention (Care-IS) to carers to improve their preparedness to care and reduce distress. METHODS: We conducted a randomised controlled trial (ACTRN:12612001147875). Carers of HGG patients were recruited during patients' combined chemoradiation treatment. The complex intervention comprised four components: (1) initial telephone assessment of carer unmet needs; (2) tailored hard-copy resource folder; (3) home visit; and, (4) monthly telephone support for up to 12 months. Primary outcomes included preparedness for caregiving and distress at 2, 4, 6 and 12 months. Intervention effects were estimated using linear mixed models which included a time by group interaction. Secondary outcomes included anxiety, depression, quality of life, carer competence and strain. RESULTS: We randomised 188 carers (n = 98 intervention, n = 90 control). The intervention group reported significantly higher preparedness for caregiving at 4 months (model ß = 2.85, 95% CI 0.76-4.93) and all follow-up timepoints including 12 months (model ß = 4.35, 95% CI 2.08-6.62), compared to the control group. However, there was no difference between groups in carer distress or any secondary outcomes. CONCLUSIONS: This intervention was effective in improving carer preparedness. However, carer distress was not reduced, potentially due to the debilitating/progressive nature of HGG and ongoing caring responsibilities. Future research must explore whether carer interventions can improve carer adjustment, self-efficacy and coping and how we support carers after bereavement. Additionally, research is needed to determine how to implement carer support into practice.

Who is responsible for postpartum contraception advice and provision? The perspective of hospital-based maternity clinicians in New South Wales, Australia.

Access to postpartum contraception is critical for the health of the mother and subsequent pregnancies. However, the differential roles and responsibilities of maternity care providers in contraception discussions and provision are often unclear. Our study, part of a larger study on midwifery provision of contraceptive implants, presents the perspectives of hospital-based maternity clinicians. Participants suggested that contraception discussions and provision are a shared responsibility of maternity care providers but identified inconsistencies and issues with current approaches. Access to contraception could be improved through more routine discussions antenatally and postnatally and greater collaboration between maternity care providers in hospital, community and primary care settings.

Increased diagnosis of attention-deficit hyperactivity disorder despite stable hyperactive/inattentive behaviours: evidence from two birth cohorts of Australian children.

BACKGROUND: Globally, ADHD diagnoses have increased substantially and there is concern that this trend does not necessarily reflect improved detection of cases but that overdiagnosis may be occurring. We directly compared ADHD diagnoses with ADHD-related behaviours and looked for changes across time among Australian children in a large, population-based prospective cohort study. METHODS: We conducted a secondary analysis of the Longitudinal Study of Australian Children, including 4,699 children born 1999/2000 (cohort 1) and 4,425 children born 2003/2004 (cohort 2), followed from 4 to 13 years of age. We compared pre-diagnosis parent-reported hyperactive/inattentive behaviour scores between newly diagnosed (incident cases) and undiagnosed children and fitted Cox's proportional hazards regression models to examine the relationship between birth cohorts 1 and 2 and the risk of incident ADHD diagnosis. RESULTS: Cumulative incident ADHD diagnoses increased from 4.6% in cohort 1 (born in 1999/2000) to 5.6% in cohort 2 (born in 2003/2004), while hyperactive/inattentive behaviour scores remained steady. Among ADHD diagnosed children, 26.5% (88/334) recorded pre-diagnosis behaviours in the normal range, 27.6% (n = 92) had borderline scores and 45.8% (n = 153) scored within the clinical range. Children born in 2003/2004 were more likely to be diagnosed with ADHD compared with those born in 1999/2000 (aHR = 1.33, 95% CI = 1.06-1.67, p = .012), regardless of their ADHD behaviour score (p = .972). CONCLUSIONS: Diagnostic increases were not driven by rises in hyperactive/inattentive behaviours. A quarter of all children with an ADHD diagnosis recorded pre-diagnosis behaviours within the normal range. The increased likelihood of being diagnosed with ADHD for children from the later birth cohort was observed for children across the full range of ADHD-related behaviours.

Increasing the availability of long-acting reversible contraception and medical abortion in primary care: the Australian Contraception and Abortion Primary Care Practitioner Support Network (AusCAPPS) cohort study protocol.

INTRODUCTION: Although primary care practitioners are the main providers of long-acting reversible contraception (LARC) and early medical abortion (EMA) in Australia, few provide these services. A professional community of practice (CoP) has the potential to improve LARC and EMA provision through evidence-based guidance, expert support and peer-to-peer engagement.The primary objective is to establish, implement and evaluate an innovative, multidisciplinary online CoP (AusCAPPS Network) to increase LARC and EMA services in Australian primary care. Secondary objectives are to (1) increase the number of general practitioners (GPs) and pharmacists certified to provide or dispense EMA, respectively, (2) increase LARC and EMA prescription rates and, (3) improve primary care practitioners' knowledge, attitudes and provision of LARC and EMA. METHODS AND ANALYSIS: A stakeholder knowledge exchange workshop (KEW) will be conducted to inform the AusCAPPS Network design. Once live, we aim to reach 3000 GPs, practice nurses and community pharmacists members. Changes in the number of GPs and pharmacists certified to provide or dispense EMA, respectively, and changes in the number of LARCs and EMAs prescribed will be gleaned through health service data. Changes in the knowledge attitudes and practices will be gleaned through an online survey with 500 individuals from each professional group at baseline and 12 months after members have joined AusCAPPs; and experiences of the AusCAPPS Network will be evaluated using interviews with the project team plus a convenience sample of 20 intervention participants from each professional group. The project is underpinned by the Reach, Effectiveness, Adoption, Implementation and Maintenance framework, and a realist framework will inform analysis. ETHICS AND DISSEMINATION: Ethical approval was received from the Monash University Human Research Ethics Committee (No. 28002). Dissemination will occur through KEWs, presentations, publications and domestic and international networks. TRIAL REGISTRATION NUMBER: ACTRN12622000655741.

Considerations for Evaluating the Introduction of New Cancer Screening Technology: Use of Interval Cancers to Assess Potential Benefits and Harms.

This framework focuses on the importance of the consideration of the downstream intermediate and long-term health outcomes when a change to a screening program is introduced. The authors present a methodology for utilising the relationship between screen-detected and interval cancer rates to infer the benefits and harms associated with a change to the program. A review of the previous use of these measures in the literature is presented. The framework presents other aspects to consider when utilizing this methodology, and builds upon an existing framework that helps researchers, clinicians, and policy makers to consider the impacts of changes to screening programs on health outcomes. It is hoped that this research will inform future evaluative studies to assess the benefits and harms of changes to screening programs.

Association of Attention-Deficit/Hyperactivity Disorder Diagnosis With Adolescent Quality of Life.

Importance: Appropriate diagnosis of attention-deficit/hyperactivity disorder (ADHD) can improve some short-term outcomes in children and adolescents, but little is known about the association of a diagnosis with their quality of life (QOL). Objective: To compare QOL in adolescents with and without an ADHD diagnosis. Design, Setting, and Participants: This cohort study followed an emulated target trial design using prospective, observational data from the Longitudinal Study of Australian Children, a representative, population-based prospective cohort study with biennial data collection from 2006 to 2018 with 8 years of follow-up (ages 6-7 to 14-15 years). Propensity score matching was used to ensure children with and without ADHD diagnosis were well matched on a wide range of variables, including hyperactive/inattentive (H/I) behaviors. Eligible children were born in 1999 to 2000 or 2003 to 2004 and did not have a previous ADHD diagnosis. All incident ADHD cases were matched with controls. Data were analyzed from July 2021 to January 2022. Exposures: Incident parent-reported ADHD diagnosis at age 6 to 7, 8 to 9, 10 to 11, 12 to 13, or 14 to 15. Main Outcomes and Measures: Quality of life at age 14 to 15 was measured with Child Health Utility 9D (CHU9D) and 8 other prespecified, self-reported measures mapped to the World Health Organization's QOL domains. Pooled regression models were fitted for each outcome, with 95% CIs and P values calculated using bootstrapping to account for matching and repeat observations. Results: Of 8643 eligible children, a total of 393 adolescents had an ADHD diagnosis (284 [72.2%] boys; mean [SD] age, 10.03 [0.30] years; mean [SD] H/I Strengths and Difficulties Questionnaire score, 5.05 [2.29]) and were age-, sex-, and H/I score-matched with 393 adolescents without ADHD diagnosis at time zero. Compared with adolescents without diagnosis, those with an ADHD diagnosis reported similar QOL on CHU9D (mean difference, -0.03; 95% CI, -0.07 to 0.01; P = .10), general health (mean difference, 0.11; 95% CI, -0.04 to 0.27; P = .15), happiness (mean difference, -0.18; 95% CI, -0.37 to 0.00; P = .05), and peer trust (mean difference, 0.65; 95% CI, 0.00 to 1.30; P = .05). Diagnosed adolescents had worse psychological sense of school membership (mean difference, -2.58; 95% CI, -1.13 to -4.06; P < .001), academic self-concept (mean difference, -0.14; 95% CI, -0.02 to -0.26; P = .02), and self-efficacy (mean difference, -0.20; 95% CI, -0.05 to -0.33; P = .007); displayed more negative social behaviors (mean difference, 1.56; 95% CI, 0.55 to 2.66; P = .002); and were more likely to harm themselves (odds ratio, 2.53; 95% CI, 1.49 to 4.37; P < .001) than adolescents without diagnosis. Conclusions and Relevance: In this cohort study, ADHD diagnosis was not associated with any self-reported improvements in adolescents' QOL compared with adolescents with similar levels of H/I behaviors but no ADHD diagnosis. ADHD diagnosis was associated with worse scores in some outcomes, including significantly increased risk of self-harm. A large, randomized clinical trial with long-term follow-up is needed.

The preferences of women in Australia for the features of long-acting reversible contraception: results of a discrete choice experiment.

PURPOSE: Long-acting reversible contraceptives (LARC), such as intrauterine devices (IUD) and implants, are highly effective. However, the uptake of LARC in Australia has been slow and the oral contraceptive pill (OC) remains the best known and most widely used contraceptive. Our aim was to investigate women's preferences for the features of LARC. METHODS: We used a discrete choice experiment (DCE) in which each respondent completed 12 choice tasks. We recruited a general population sample of 621 women in Australia aged 18-49 using an online survey panel. A mixed logit model was used to analyse DCE responses; a latent class model explored preference heterogeneity. RESULTS: Overall, 391 (63%) of women were currently using contraception; 49.3% were using an OC. About 22% of women were using a LARC. Women prefer products that are more effective in preventing pregnancy, have low levels of adverse events (including negative effects on mood), and which their general practitioner (GP) recommends or says is suitable for them. CONCLUSIONS: Women have strong preferences for contraceptive products that are effective, safe, and recommended by their GP. The results indicate which characteristics of LARCs need to be front and centre in information material and in discussions between women and healthcare professionals.

A prospective longitudinal study of health-related quality of life and psychological wellbeing after an implantable cardioverter-defibrillator in patients with genetic heart diseases.

Background: Genetic heart diseases (GHDs) can be clinically heterogeneous and pose an increased risk of sudden cardiac death (SCD). The implantable cardioverter-defibrillator (ICD) is a lifesaving therapy. Impacts on prospective and long-term psychological and health-related quality of life (HR-QoL) after ICD implant in patients with GHDs are unknown. Objectives: Investigate the psychological functioning and HR-QoL over time in patients with GHDs who receive an ICD, and identify risk factors for poor psychological functioning and HR-QoL. Methods: A longitudinal, prospective study design was used. Patients attending a specialized clinic, diagnosed with a GHD for which they received an ICD between May 2012 and January 2015, were eligible. Baseline surveys were completed prior to ICD implantation with 5-year follow-up after ICD implant. We measured psychological functioning (Hospital Anxiety Depression Scale, Florida Shock Anxiety Scale), HR-QoL (Short-Form 36v2), and device acceptance (Florida Patient Acceptance Scale). Results: Forty patients were included (mean age 46.3 ± 14.2 years; 65.0% male). Mean psychological and HR-QoL measures were within normative ranges during follow-up. After 12 months, 33.3% and 19.4% of participants showed clinically elevated levels of anxiety and depression, respectively. Longitudinal mixed-effect analysis showed significant improvements from baseline to first follow-up for the overall cohort, with variability increasing after 36 months. Nontertiary education and female sex predicted worse mental HR-QoL and anxiety over time, while comorbidities predicted depression and worse physical HR-QoL. Conclusion: While the majority of patients with a GHD adjust well to their ICD implant, a subset of patients experience poor psychological and HR-QoL outcomes.

Sustainable and effective methods to increase long-acting reversible contraception uptake from the ACCORd general practice trial.

OBJECTIVE: Most Australian women access contraception through general practitioners (GPs) but choose oral methods rather than long-acting reversible contraceptives (LARCS). The Australian Contraceptive ChOice pRoject (ACCORd) successfully tested a complex intervention for LARC uptake. We aimed to explore the critical elements of this intervention to increase LARC uptake. DESIGN: ACCORd was a cluster randomised control trial conducted in 57 GP clinics in Melbourne, Australia. To explore intervention impact, fidelity checks (n=21 GPs) and interviews with 37 GPs and 40 patients were undertaken 12 months after initial consultations. Data were inductively coded, thematically analysed and mapped to Normalization Process Theory constructs. RESULTS: Doctors understood the importance of effectiveness-based contraceptive counselling (EBCC). GPs demonstrated cognitive engagement in the promotion of LARC and some appreciated the rapid referral pathways. GPs and women valued the effectiveness approach. GPs held varying views about having a rapid referral pathway, with many already having established pathways in place. Some GPs viewed intrauterine device insertion costs or insertion training as barriers to ongoing practice. Most GPs and women saw the ACCORD model as effective and sustainable. CONCLUSIONS: GP training in EBCC and the use of rapid referral pathways were critical features of an effective sustainable model for successful uptake of LARCs in primary care. IMPLICATIONS FOR PUBLIC HEALTH: Improving Australian women's access to and use of LARCs is sustainable with EBCC training and support for general practitioners.

Sexual Difficulties, Problems, and Help-Seeking in a National Representative Sample: The Second Australian Study of Health and Relationships.

The Australian Study of Health and Relationships is a large national population-representative survey of sexual behavior and attitudes conducted every decade. We describe experiences of sexual difficulties lasting at least a month among Australians surveyed in 2012-2013 and identify changes since the previous survey in 2001-2002. Computer-assisted telephone interviews were completed by 20,091 people aged 16-69 years (participation rate 66%) of whom 16,897 people had had sex with a partner in the previous year. We asked how long each difficulty lasted, whether it was a problem, and whether they sought treatment. Half (48%) the men and 68% of women reported at least one difficulty. Lack of interest in having sex was common (28% men, 52% women); 21% of men reported coming to orgasm "too quickly" and women reported inability to reach orgasm (25%) and trouble with vaginal dryness (22%). Women were more likely than men not to find sex pleasurable and to have physical pain during intercourse. Some differences by age group were also apparent. Many difficulties were not seen as problems, especially lacking interest and reaching orgasm too quickly. People with erection/dryness problems, or with pain in intercourse, were more likely to seek treatment, as were people with multiple difficulties. Between 2001-2002 and 2012-2013, there was little change for men, but among women rates of all sexual difficulties fell by 4-10 percentage points. This change accompanied a drop in frequency of sex among people in ongoing relationships and an increase in masturbation and use of pornography. One explanation might be that, over time, fewer women were agreeing to "service sex" when they were not in the mood. Overall, the drop in prevalence of women's sexual difficulties since a decade earlier suggests a change towards more egalitarian sexual relations.

Transverse position. Using rotation to aid normal birth-OUTcomes following manual rotation (the TURN-OUT trial): a randomized controlled trial.

BACKGROUND: The fetal occiput transverse position in the second stage of labor is associated with adverse maternal and perinatal outcomes. Prophylactic manual rotation in the second stage of labor is considered a safe and easy to perform procedure that has been used to prevent operative deliveries. OBJECTIVE: This study aimed to determine the efficacy of prophylactic manual rotation in the management of the occiput transverse position for preventing operative delivery. We hypothesized that among women who are at ≥37 weeks' gestation with a baby in the occiput transverse position early in the second stage of labor, manual rotation compared with a "sham" rotation will reduce the rate of operative delivery. STUDY DESIGN: A double-blinded, parallel, superiority, multicenter, randomized controlled clinical trial in 3 tertiary hospitals was conducted in Australia. The primary outcome was operative (cesarean, forceps, or vacuum) delivery. Secondary outcomes were cesarean delivery, serious maternal morbidity and mortality, and serious perinatal morbidity and mortality. Outcomes were analyzed by intention to treat. Proportions were compared using χ2 tests adjusted for stratification variables using the Mantel-Haenszel method or Fisher exact test. Planned subgroup analyses by operator experience and technique of manual rotation (digital or whole hand rotation) were performed. The planned sample size was 416 participants (trial registration: ACTRN12613000005752). RESULTS: Here, 160 women with a term pregnancy and a baby in the occiput transverse position in the second stage of labor, confirmed by ultrasound, were randomly assigned to receive either a prophylactic manual rotation (n=80) or a sham procedure (n=80), which was less than our original intended sample size. Operative delivery occurred in 41 of 80 women (51%) assigned to prophylactic manual rotation and 40 of 80 women (50%) assigned to a sham rotation (common risk difference, -4.2% [favors sham rotation]; 95% confidence interval, -21 to 13; P=.63). Among more experienced proceduralists, operative delivery occurred in 24 of 47 women (51%) assigned to manual rotation and 29 of 46 women (63%) assigned to a sham rotation (common risk difference, 11%; 95% confidence interval, -11 to 33; P=.33). Cesarean delivery occurred in 6 of 80 women (7.5%) in the manual rotation group and 7 of 80 women (8.7%) in the sham group. Instrumental (forceps or vacuum) delivery occurred in 35 of 80 women (44%) in the manual rotation group and 33 of 80 women (41%) in the sham group. There was no significant difference in the combined maternal and perinatal outcomes. The trial was terminated early because of limited resources. CONCLUSION: Planned prophylactic manual rotation did not result in fewer operative deliveries. More research is needed in the use of manual rotation from the occiput transverse position for preventing operative deliveries.

Attributable factors for the rising cesarean delivery rate over 3 decades: an observational cohort study.

BACKGROUND: Cesarean delivery rates continue to rise globally, the reasons for which are incompletely understood. OBJECTIVE: We aimed to characterize the attributable factors for the increasing cesarean delivery rates over a 30-year period within our health network. STUDY DESIGN: This was a planned observational cohort study across 2 hospitals (a large tertiary referral hospital and a metropolitan hospital) in Sydney, Australia using data from a previously published study. The following 2 time periods were compared: 1989-99 and 2009-16, between which the cesarean delivery rate increased from 19% to 30%. The participants were all women who had a cesarean delivery after 24 weeks' gestational age. The data were analyzed using multiple imputation and robust Poisson regression to calculate the differences in the adjusted and unadjusted relative risk of cesarean delivery and estimate the changes in the cesarean delivery rate attributable to maternal and clinical factors. The primary outcome was cesarean delivery. RESULTS: After 576 exclusions, 102,589 births were included in the analysis. Fifty-six percent of the increase in the rate of cesarean delivery was attributed to changes in the distribution of the maternal age, body mass index, and parity and to a history of previous cesarean delivery. An additional 10% of the increase was attributed to changes in the obstetrical management of the following high-risk pregnancies: multiple gestation, malpresentation (mainly breech), and preterm singleton birth. When prelabor cesarean deliveries for maternal choice, suspected fetal compromise, previous pregnancy issues, and suspected large fetus were excluded, 78% of the increase was attributed to either maternal factors or changes in the obstetrical management of these high-risk pregnancies. CONCLUSION: Most of the steep rise in the cesarean delivery rate from 19% to 30% was attributed to changes in the maternal demographic and clinical factors. This observation is relevant to developing preventative strategies that account for nulliparity, age, body mass index, and management of high-risk pregnancies.

Simulations found within-subject measurement variation in glycaemic measures may cause overdiagnosis of prediabetes and diabetes.

OBJECTIVE: To determine the impact of test measurement variation on misclassification of prediabetes and diabetes in the US adult population. STUDY DESIGN AND SETTING: Data from adults with no prior diagnosis of diabetes in the 2015 to 2016 National Health and Nutrition Examination Survey (NHANES) were used to simulate populations of US adults eligible for screening. Estimates of measurement variation were applied to each simulated individual's true values to generate observed values for up to five repeated screens. RESULTS: UNDERDIAGNOSIS: For 100,000 people assessed according to ADA or USPSTF guidelines, no people with true values in the diabetes range would be underdiagnosed as normal after one screen, and between 64 and 138 people would be misclassified with prediabetes after five re-screens (depending on guideline and test used). OVERDIAGNOSIS: For 100,000 people assessed according to the guidelines, between 1,602 and 2,233 people with true values in the normal range would be over diagnosed with prediabetes after 3 re-screens. A further 627 to 1,672 people with true values in the prediabetes range would be over diagnosed with diabetes after 5 re-screens. CONCLUSION: Measurement variation may cause overdiagnosis of prediabetes and diabetes, as well as apparent "progression" or "regression" of either condition.