Cohort Of Young Australian Women Research Articles

The prevalence and variations in unintended pregnancy by socio-demographic and health-related factors in a population-based cohort of young Australian women

ObjectiveThe aim of this study is to estimate the prevalence of unintended pregnancy and associated socio-demographic and health-related factors among a national cohort of young Australian women. MethodsSecondary analysis of three waves (2013–2015) of the Australian Longitudinal Study on Women’s Health new young cohort. Women born between 1989 and 1995 were recruited through internet and traditional media, and peer referral. Respondents completed a baseline web-based survey in 2013 (n=17,010) on their health and healthcare use and were followed up annually. This analysis uses data from women reporting ever having vaginal sex in waves 2 (n=9,726/11,344) and 3 (n=6,848/8,961). We assessed correlates of lifetime and recent unintended pregnancy using multivariable regression models. ResultsAt wave 2, among women aged 19–24, lifetime prevalence of unintended pregnancy was 12.6%, rising to 81.0% among ever pregnant women. Pregnancy outcomes among women with a history of unintended pregnancy differed by geographical residence. Disparities in odds of unintended pregnancy were seen by relationship and educational status, contraceptive use, sexual coercion and risky alcohol use. ConclusionsUnintended pregnancy among young Australians is disproportionally experienced by women with structural disadvantages and exposure to sexual coercion. Public health implicationsService improvements to achieve equitable distribution of contraception and abortion services must be integrated with initiatives responding to sexual coercion.

Associations between indicators of energy intake and expenditure with excess weight and obesity among women in sedentary and less-sedentary jobs

The aim of this study was to compare the associations between indicators of energy intake and expenditure with excess weight and obesity in women who work full-time in sedentary and less sedentary jobs.Data were from 3444 participants the Australian Longitudinal Study on Women's Health, who reported their weight, dietary intake, physical activity and occupation in 2009 (baseline), and weight in 2012 (follow-up). Participants were categorised as being in a ‘less sedentary’ or ‘sedentary’ job, based on occupational activity patterns. Odds of excess weight (BMI ≥ 25) at baseline and of being obese (BMI ≥ 30) at follow-up, by indicators of energy intake and expenditure, were compared in the two occupational groups.In multivariate analyses, high non-work sitting time and saturated fat intake were associated with increased odds of obesity at 3-year follow-up in both occupational groups. In the sedentary job group, high physical activity (in leisure and transport) was associated with a 51% reduction in odds of obesity (OR 0.49, 95%CI 0.25–0.97). In the less-sedentary job group, energy intake and high soft drink consumption were associated with markedly increased odds of obesity (OR 1.67 95%CI 1.07–2.61; OR 2.08 95%CI1.42–3.05, respectively).In this cohort of young Australian women, sedentariness at work did not markedly affect the prevalence of excess weight or obesity. Indicators of high energy intake and low energy expenditure were associated with increased odds of both excess weight and obesity, regardless of sedentariness of occupational group.

Alcohol‐related risk from pre‐loading and heavy episodic drinking (HED) among a cohort of young Australian women: a cross‐sectional analysis

ObjectiveTo cross‐sectionally examine heavy episodic drinking (HED) and pre‐loading with alcohol among young Australian women in relation to the alcohol‐induced adverse outcomes of memory loss, vomiting and injury. MethodsA total of 7,800 participants, aged 20–25 years, from the 1989–95 cohort of the Australian Longitudinal Study on Women's Health answered all questions on alcohol use, reported drinking alcohol in the previous year and were not pregnant at the third survey in 2015. Log‐binomial models were used to estimate prevalence ratios for adverse outcomes associated with increased frequency of HED and pre‐loading. ResultsThe majority of participants reported HED (83.4%) and/or pre‐loading (65.6%), which had a moderate correlation (r=0.646). Just over half (55.2%) of participants experienced at least one adverse event, with vomiting being most common. As the frequency of HED or pre‐loading increased, so did the risk of an adverse outcome. ConclusionsBoth HED and pre‐loading pose a risk to young Australian women, and that risk rises with increased frequency. Implications for public healthAlthough HED has been a target of public health policy and interventions, pre‐loading has received limited attention. In addition to addressing HED, there is a need to consider the risk posed by pre‐loading, a related, yet unique risky drinking behaviour.

Mental health-related quality of life and the timing of motherhood: a 16-year longitudinal study of a national cohort of young Australian women.

We examine timing of motherhood in a longitudinal cohort of young Australian women, and its relationship with mental health-related quality of life (SF-36 MHI-5), and with sociodemographic, health behaviour and health-related variables. We analysed longitudinal self-report data from a nationally representative cohort of 10,332 Australian women born 1973-1978, surveyed 6 times between 1996 (aged 18-23) and 2012 (aged 34-39). Group-based trajectory modelling identified four groups. Normative Mothers (46%, mean age at motherhood 30.5years) made the transition to motherhood close to the Australian median age. Early Mothers (25%, 25.2years) and Very Early Mothers (7%, 20.0years) made this transition earlier; Not Mothers (22%) had not given birth. Generalised linear mixed models showed that all groups improved mean MHI-5 scores over time. Patterns of group differences were complex: Normative and Early Mothers scored consistently highest; Very Early Mothers scored lowest at most surveys; Not Mothers' scores increased relative to others over time. Most effects disappeared after adjustment for confounders. Early and Very Early Mothers showed multiple indicators of social disadvantage, while Not Mothers had very low rates of marriage. Timing of motherhood is embedded in sociodemographic and personal contexts. Women with socioeconomic advantages were characterised by higher mental health-related quality of life and later transition to motherhood, but adjustment for relative advantage attenuated differences in mental health-related quality of life. The overall findings suggest a pattern of positive adaptation to circumstances, with mental health-related quality of life improving through early adulthood regardless of timing of motherhood.

Does psychosocial stress explain socioeconomic inequities in 9-year weight gain among young women?

This study investigated the contribution of psychosocial stress to mediating inequities in weight gain by educational status in a large cohort of young Australian women over a 9-year follow-up. This observational cohort study used survey data drawn from 4,806 women, aged 22 to 27 years at baseline (2000), participating in the Australian Longitudinal Study on Women's Health, who reported their education level (2000), perceived stress (2003), and weight (2003 and 2012). Using a causal inference framework based on counterfactuals for mediation analysis, we fitted linear or logistic regression models to examine the total effect, decomposed into natural direct and indirect effects via perceived stress, of education level (highest qualification completed: up to year 12/trade or diploma vs. university) on weight change. Women with lower education gained more weight over 9 years (6.1 kg, standard deviation [SD] 9.5) than women with higher education (3.8 kg, SD 7.7; P < 0.0001) and were more likely to be very or extremely stressed. The higher weight gain associated with low education was not mediated through perceived stress (per SD increase, percent mediated: 1.0%). Education-based inequities in weight gain over time were not attributable to greater psychosocial stress among women with lower education levels.

Childhood sexual abuse and its association with adult physical and mental health: results from a national cohort of young Australian women.

Childhood sexual abuse (CSA) occurs across the world, with a prevalence of 20% internationally. Our aim was to investigate the associations between CSA, CSA plus adult violence experiences, and selected self-reported physical and mental health in a community sample of women. Data from 7,700 women aged 28-33 years from the 1973-1978 cohort who completed Survey 4 of the Australian Longitudinal Study on Women's Health (ALSWH) were analyzed. Questions about prior abuse experience such as child sexual abuse, IPV, adult physical and sexual assaults, andphysical and mental health. Women who experienced CSA were 1.4 times more likely to experience bodily pain (adjusted odds ratio [AOR] = 1.37, confidence interval [CI] = [1.19, 1.58]), 1.3 times more likely to have poorer general health (AOR = 1.33, CI = [1.15, 1.54]), and 1.4 times more likely to be depressed in the past 3 years (AOR = 1.44, CI = [1.22, 1.71]) compared with those without abuse.. Women who experienced both CSA and adult violence were 2.4 to 3.1 times more likely to experience poor general (AOR = 2.35, CI = [1.76, 3.14]) and mental health (AOR = 2.69, CI = [1.98, 3.64]), and suffer from depression (AOR = 2.84, CI = [2.13, 3.78]) and anxiety (AOR = 3.10, CI = [2.12, 4.53]) compared with women with no abuse. This study demonstrates the importance of CSA in pain and poorer long-term mental and physical health.. It emphasizes how prior CSA may amplify pain and poorer long-term mental and physical health among women who are again exposed to violence in adulthood.

Prevalent and Incident Bacterial Vaginosis Are Associated with Sexual and Contraceptive Behaviours in Young Australian Women

BackgroundTo determine prevalence and incidence of bacterial vaginosis (BV) and risk factors in young sexually-active Australian women.Methods1093 women aged 16–25 years were recruited from primary-care clinics. Participants completed 3-monthly questionnaires and self-collected vaginal smears 6-monthly for 12-months. The primary endpoint was a Nugent Score = 7–10 (BV) and the secondary endpoint was a NS = 4–10 (abnormal flora [AF]). BV and AF prevalence estimates and 95% confidence intervals (95%CI) were derived, and adjusted odds ratios (AOR) calculated to explore epidemiological associations with prevalent BV and AF. Proportional-hazards regression models were used to examine factors associated with incident BV and AF.ResultsAt baseline 129 women had BV [11.8% (95%CI: 9.4–14.2)] and 188 AF (17.2%; 15.1–19.5). Prevalent BV was associated with having a recent female partner [AOR = 2.1; 1.0–4.4] and lack of tertiary-education [AOR = 1.9; 1.2–3.0]; use of an oestrogen-containing contraceptive (OCC) was associated with reduced risk [AOR = 0.6; 0.4–0.9]. Prevalent AF was associated with the same factors, and additionally with >5 male partners (MSP) in 12-months [AOR = 1.8; 1.2–2.5)], and detection of C.trachomatis or M.genitalium [AOR = 2.1; 1.0–4.5]. There were 82 cases of incident BV (9.4%;7.7–11.7/100 person-years) and 129 with incident AF (14.8%; 12.5–17.6/100 person-years). Incident BV and AF were associated with a new MSP [adjusted rate ratio (ARR) = 1.5; 1.1–2.2 and ARR = 1.5; 1.1–2.0], respectively. OCC-use was associated with reduced risk of incident AF [ARR = 0.7; 0.5–1.0].ConclusionThis paper presents BV and AF prevalence and incidence estimates from a large prospective cohort of young Australian women predominantly recruited from primary-care clinics. These data support the concept that sexual activity is strongly associated with the development of BV and AF and that use of an OCC is associated with reduced risk.

Mycoplasma genitalium Incidence, Organism Load, and Treatment Failure in a Cohort of Young Australian Women

Mycoplasma genitalium (MG) is an emerging sexually transmitted infection (STI) that is potentially associated with reproductive tract sequelae in women. This study aimed to estimate MG incidence and treatment failure and provide estimates of organism load in infection. 1110 women aged 16-25 years were recruited from primary care clinics in Australia. Women were tested for MG at baseline, 6 months, and 12 months, and MG organism load was measured by quantitative polymerase chain reaction (PCR). MG-positive cases were screened for MG 23S ribosomal RNA (rRNA) gene point mutations shown to confer azithromycin resistance using high-resolution melt following PCR. MG incidence rate was 1.3 per 100 person-years (n=14; 95% confidence interval [CI], .8-2.3); women reporting 3 or more sex partners in the last 12 months had an increased rate of incident infection (rate ratio [RR], 5.1; 95% CI, 1.3-19.6]). There were 3 cases of MG reinfection (0.8 per 100 person-years [95% CI, .1-.9]. Organism load was higher for prevalent than incident infection (P=.04). There were 3 cases of treatment failure (9.4% [95% CI, 2.0-25.0]); organism load was higher in cases with treatment failure than in successfully treated cases (P<.01). An MG 23S rRNA mutation was detected in 5 cases (3 cases of treatment failure and 2 successfully treated). Although MG incidence was relatively low, testing should be recommended for women considered to be at increased risk based on sexual history. Our results also suggest that organism load might be important in azithromycin treatment failure.

P1-S1.28 The prevalence and incidence of bacterial vaginosis in a cohort of young Australian women

BackgroundBacterial vaginosis (BV) is a common condition of unknown aetiology that can be associated with late miscarriage, pre-term delivery, PID and increased susceptibility to HIV & other STIs. In Australia,...

P1-S1.56 The incidence of Mycoplasma genitalium in a cohort of young Australian women

BackgroundMycoplasma genitalium (Mg) is an emerging sexually transmitted infection that has been associated with serious upper genital tract infections in women such as cervicitis, pelvic inflammatory disease and endometritis. The...

O1-S01.02 The incidence of genital Chlamydia trachomatis in a cohort of young Australian women

BackgroundChlamydia is a sexually transmitted infection that can cause serious upper genital tract infections, however, in Australia there are limited population data for chlamydia. Understanding the incidence of chlamydia will...

A Longitudinal Analysis of Complementary and Alternative Medicine Use by a Representative Cohort of Young Australian Women with Asthma, 1996–2006

Background. There is evidence of asthma patients using complementary and alternative medicine (CAM). This article reports the findings of the first ever longitudinal study of CAM use among women with asthma from a large nationally representative sample. Methods. A longitudinal analysis of questionnaires completed in 1996, 2000, 2003, and 2006 as part of the Australian Longitudinal Study on Women's Health. The cohort began with 14,701 randomly selected young women (aged 18–22 years). CAM use was defined as a consultation with a range of complementary practitioners in the 12 months prior to each survey. Statistical analyses included the use of generalized estimating equations. Results. Over the 10-year period, approximately 26% of the women were asthmatic. Asthmatic women were significantly more likely to use CAM (19%, 22%, and 36% for surveys 2–4, respectively) than non-asthmatic women (15%, 20%, and 32% for surveys 2–4, respectively). CAM use increased as time since asthma diagnosis increased. However, only the increase in consultations with a naturopath/herbalist remains statistically significant when the CAM modalities are considered individually alongside asthma status. The longitudinal model suggests that women with asthma are 1.13 (95% CI: 1.05–1.21) times more likely to consult with a CAM practitioner (p< .001). The study also shows that CAM users have a higher dissatisfaction with conventional healthcare services and consultations when compared to CAM non-users. Conclusion. These findings suggest that women with asthma may turn to CAM after conventional care fails to adequately address their healthcare needs.

Low Incidence of Bacterial Vaginosis in Cohort of Young Australian Women

Cohort study of incident bacterial vaginosis (BV) in Australian students. BV only occurred in vaginally sexually active women (BV incidence = 2.2 [95% confidence interval, 0.8-4.9]/100 woman-years), and no incident BV occurred in women who did not engage in vaginal sex during the cohort period (0 [95% confidence interval, 0-3.2]/100 woman-years), P = 0.10. In university students, incident BV was uncommon and absent in sexually abstinent women.

Depression and termination of pregnancy (induced abortion) in a national cohort of young Australian women: the confounding effect of women's experience of violence

BackgroundTermination of pregnancy is a common and safe medical procedure in countries where it is legal. One in four Australian women terminates a pregnancy, most often when young. There is inconclusive evidence about whether pregnancy termination affects women's rates of depression. There is evidence of a strong association between partner violence and depression.Our objective was to examine the associations with depression of women's experience of violence, pregnancy termination, births and socio-demographic characteristics, among a population-based sample of young Australian women.MethodsThe data from the Younger cohort of the Australian Longitudinal Study on Women's Health comprised 14,776 women aged 18–23 in Survey I (1996) of whom 9683 aged 22–27 also responded to Survey 2 (2000). With linked data, we distinguished terminations, violence and depression reported before and after 1996.We used logistic regression to examine the association of depression (CES-D 10) as both a dichotomous and linear measure in 2000 with pregnancy termination, numbers of births and with violence separately and then in mutually adjusted models with sociodemographic variables.Results30% of young women were depressed. Eleven percent (n = 1076) reported a termination by 2000. A first termination before 1996 and between 1996 and 2000 were both associated with depression in a univariate model (OR 1.37, 95%CI 1.12 to 1.66; OR 1.52, 95%CI 1.24 to 1.87). However, after adjustment for violence, numbers of births and sociodemographic variables (OR 1.22, 95%CI 0.99 to 1.51) this became only marginally significant, a similar association with having two or more births (1.26, 95%CI. 1.00 to 1.58).In contrast, any form of violence but especially that of partner violence in 1996 or 2000, was significantly associated with depression: in univariate (OR 2.31, 95%CI 1.97 to 2.70 or 2.45, 95% CI 1.99 to 3.04) and multivariate models (AOR 2.06, 95%CI 1.74 to 2.43 or 2.12, 95%CI 1.69 to 2.65). Linear regression showed a four fold greater effect of violence than termination or births.ConclusionViolence, especially partner violence, makes a significantly greater contribution to women's depression compared with pregnancy termination or births. Any strategy to reduce the burden of women's depression should include prevention or reduction of violence against women and strengthening women's sexual and reproductive health to ensure that pregnancies are planned and wanted.

Life transitions and mental health in a national cohort of young Australian women.

Young adulthood, a time of major life transitions and risk of poor mental health, may affect emotional well-being throughout adult life. This article uses longitudinal survey data to examine young Australian women's transitions across 4 domains: residential independence, relationships, work and study, and motherhood. Changes over 3 years in health-related quality of life, optimism, depressive symptoms, stress, and life satisfaction, were examined in relation to these transitions among 7,619 young adult participants in the nationally representative Australian Longitudinal Study on Women's Health. Positive changes in mental health occurred for women moving into cohabitation and marriage, whereas reductions were observed among those experiencing marital separation or divorce and those taking on or remaining in traditionally "feminine" roles (out of the workforce, motherhood). The data suggest that women cope well with major life changes at this life stage, but reductions in psychological well-being are associated with some transitions. The findings suggest that preventive interventions to improve women's resilience and coping might target women undergoing these transitions and that social structures may not be providing sufficient support for women making traditional life choices.

Termination of pregnancy: associations with partner violence and other factors in a national cohort of young Australian women

To examine the associations between termination and other reproductive events, socio-demographic characteristics and experience of violence among a community-based national sample of young Australian women. Using multiple logistic regression, we analysed data from the Younger cohort of the Australian Longitudinal Study on Women's Health comprising 14,776 young women aged 18-23 in survey 1 (1996), of whom 9,683 aged 22-27 also responded to survey 2 (2000). We stratified respondents into those aged below 20 and those who were older at survey 1. We compared the characteristics associated with terminations among teenage women in 1996 (survey 1) with those of women aged over 20 in 1996 who had not then reported a termination and who responded to survey 2 in 2000. Finally, we compared the characteristics of women reporting terminations, births, preterm births and miscarriages. Women reporting teenage terminations were more likely to be in a de facto relationship (OR = 1.94, 95% CI 1.17-3.21), less well educated (OR = 2.32, 95% CI 1.44-3.74), have no private health insurance, and be a victim of partner violence (OR = 3.11, 95% CI 1.76-5.49). Women reporting later terminations were also more likely to be abused by a partner (OR = 3.52, 95% CI 2.14-5.81).The relationship with violence held for the other reproductive events. Partner violence is a strong predictor of termination and other reproductive outcomes among young Australian women. Education has a protective effect. Prevention and reduction of partner violence may reduce the rate of unwanted pregnancy.

Correlates of depressive symptoms in a representative sample of young Australian women

This paper presents a descriptive analysis of the prevalence of depressive symptoms among a national cohort of young Australian women, and the characteristics of those who experience them. It explores the associations between demographic and health-related variables and depressive symptoms in a representative sample of 9333 Australian women aged 22 – 27 years, from the Australian Longitudinal Study on Women's Health. Approximately 30% of these young women indicated that they were experiencing depressive symptoms, as indicated by the Center for Epidemiological Studies Depression Scale (CES-D-10). After adjusting for age and rurality of residence, depressive symptoms were related to the following demographic variables: low income, low educational qualifications, a history of unemployment, not being in a relationship, and living arrangements other than living with a partner. Those health-related variables that were significantly associated with depressive symptoms included frequent visits to doctors and medical specialists, and a higher number of physical symptoms experienced and diagnoses made. More illicit drug use, higher use of cigarettes and alcohol, and lower exercise status were also significantly associated with depressive symptoms. This analysis supports the view that depression is one aspect of a multifactorial cluster of negative conditions across several domains of functioning, including physical ill-health, risky behaviours, and marginal social status. The complex interactions between these conditions, of which depression is only one, underscore the difficulties that arise in the treatment of depression and support the value of preventive interventions as an important public health strategy.