Financial incentives for quitting smoking in pregnancy: Are they cost-effective?

AIMS: To evaluate whether adding financial incentives to usual care is cost-effective in encouraging pregnant women to quit tobacco smoking, compared with usual care alone. DESIGN: Cost-effectiveness analysis (CEA) and cost-utility analysis (CUA) from a health-care provider's perspective, embedded in the Smoking Cessation in Pregnancy Incentives Trial (CPIT III). Long-term analyses were conducted from the same perspective, using an existing Markov model over a life-time horizon. SETTING: Seven maternity smoking cessation sites in Scotland, England and Northern Ireland in the United Kingdom. PARTICIPANTS: In the short-term analysis, CPIT III participants were assessed: women 16 years or older, self-reporting as smokers, fewer than 24 weeks pregnant and English-speaking (n = 944). The same population was used for the life-time analysis, plus their infants. MEASUREMENTS: Costs included financial incentive vouchers and postage, cessation support and nicotine replacement therapy and neonatal stays. The outcome measure was a biochemically verified quit rate for the CEA and quality-adjusted life-years (QALYs) for CUA. Costs are presented in 2020 GBP sterling (£). Data for the life-time analysis came from the trial and were combined with data from published literature embedded in the model, reporting incremental cost per quitter and QALY. A 3.5% discount rate was applied. FINDINGS: The short-term incremental cost per quitter was £4400 and cost per QALY was £150 000. Results of sensitivity analyses confirmed these results. The long-term analysis combined costs and outcomes for mother and infants; results showed a cost saving of £37 [95% confidence interval (CI]) = £35-106] and increase in QALYs of 0.171 (95% CI = 0.124-0.229). These findings indicate that, over a life-time, financial incentives are cost-saving and improve health outcomes. CONCLUSIONS: In the United Kingdom, offering up to £400 financial incentives, in addition to usual care, to support pregnant women to stop smoking appears to be highly cost-effective over a life-time for mother and infants.

The smoking cessation in pregnancy incentives trial (CPIT): study protocol for a phase III randomised controlled trial.

BACKGROUND: Eighty per cent of UK women have at least one baby, making pregnancy an opportunity to help women stop smoking before their health is irreparably compromised. Smoking cessation during pregnancy helps protect infants from miscarriage, still birth, low birth weight, asthma, attention deficit disorder and adult cardiovascular disease. UK national guidelines highlight lack of evidence for effectiveness of financial incentives to help pregnant smokers quit. This includes a research recommendation: within a UK context, are incentives an acceptable, effective and cost-effective way to help pregnant women who smoke to quit? METHODS: The Cessation in Pregnancy Incentives Trial (CPIT) III is a pragmatic, 42-month, multi-centre, parallel-group, individually randomised controlled superiority trial of the effect on smoking status of adding to usual Stop Smoking Services (SSS) support, the offer of up to £400 of financial voucher incentives, compared with usual support alone, to quit smoking during pregnancy. Participants (n = 940) are pregnant smokers (age > 16 years, < 24 weeks pregnant, English speaking), who consent via telephone to take part and are willing to be followed-up in late pregnancy and 6 months after birth. The primary outcome is cotinine/anabasine-validated abstinence from smoking in late pregnancy. Secondary outcomes include engagement with SSS, quit rates at 4 weeks from agreed quit date and 6 months after birth, and birth weight. Outcomes will be analysed by intention to treat, and regression models will be used to compare treatment effects on outcomes. A meta-analysis will include data from the feasibility study in Glasgow. An economic evaluation will assess cost-effectiveness from a UK NHS perspective. Process evaluation using a case-study approach will identify opportunities to improve recruitment and learning for future implementation. Research questions include: what is the therapeutic efficacy of incentives; are incentives cost-effective; and what are the potential facilitators and barriers to implementing incentives in different parts of the UK? DISCUSSION: This phase III trial in Scotland, England and Northern Ireland follows a successful phase II trial in Glasgow, UK. The participating sites have diverse SSS that represent most cessation services in the UK and serve demographically varied populations. If found to be acceptable and cost-effective, this trial could demonstrate that financial incentives are effective and transferable to most UK SSS for pregnant women. TRIAL REGISTRATION: Current Controlled Trials, ISRCTN15236311. Registered on 9 October 2017.

Development of a biochemical marker to detect current breast milk intake.

The WHO recommends exclusive breastfeeding for 6 months, but despite interventions, breastfeeding rates remain stubbornly low. Financial voucher incentives have shown promise but require a biomarker for validation of intake. This study aimed to develop a simple biochemical assay of infant urine that would tell if an infant was receiving any breast milk to validate maternal report. Urine samples were collected and snap frozen from 34 infants attending with minor illness or feeding problems, of whom 12 infants were exclusively breastfed, nine exclusively formula fed, and 11 mixed breast/formula fed. High-performance anion exchange chromatography was used to identify discriminating patterns of monosaccharide composition of unconjugated glycans in a sequence of three experiments. The absolute concentration of all human milk oligosaccharides measured blind could detect "any breastfeeding" only with a sensitivity of 48% and specificity of 78%. Unblinded examination of N-acetylglucosamine (GlcNAc) measured as GlcNH2 after hydrolysis of GlcNAc improved sensitivity to 75% at the expense of a specificity of 28%. Estimation of the relative abundance of GlcNH2 (GlcNH2[%]) or the ratio of GlcNH2 to endogenous mannose (Man) improved accuracy. In a further blind experiment, the GlcNH2/Man ratio with a cut-off of 1.5 correctly identified all those receiving "any breast milk," while excluding exclusively formula fed infants. The GlcNH2/Man ratio in infant urine is a promising test to provide biochemical confirmation of any breastfeeding for trials of breastfeeding promotion.

Birth weight differences between those offered financial voucher incentives for verified smoking cessation and control participants enrolled in the Cessation in Pregnancy Incentives Trial (CPIT), employing an intuitive approach and a Complier Average Causal Effects (CACE) analysis.

BACKGROUND: The Cessation in Pregnancy Incentives Trial (CPIT), which offered financial incentives for smoking cessation during pregnancy showed a clinically and statistically significant improvement in cessation. However, infant birth weight was not seen to be affected. This study re-examines birth weight using an intuitive and a complier average causal effects (CACE) method to uncover important information missed by intention-to-treat analysis. METHODS: CPIT offered financial incentives up to £400 to pregnant smokers to quit. With incentives, 68 women (23.1%) were confirmed non-smokers at primary outcome, compared to 25 (8.7%) without incentives, a difference of 14.3% (Fisher test, p < 0.0001). For this analysis, randomised groups were split into three theoretical sub-groups: independent quitters - quit without incentives, hardened smokers - could not quit even with incentives and potential quitters - required the addition of financial incentives to quit. Viewed in this way, the overall birth weight gain with incentives is attributable only to potential quitters. We compared an intuitive approach to a CACE analysis. RESULTS: Mean birth weight of potential quitters in the incentives intervention group (who therefore quit) was 3338 g compared with potential quitters in the control group (who did not quit) 3193 g. The difference attributable to incentives, was 3338 - 3193 = 145 g (95% CI -617, +803). The mean difference in birth weight between the intervention and control groups was 21 g, and the difference in the proportion who managed to quit was 14.3%. Since the intervention consisted of the offer of incentives to quit smoking, the intervention was received by all women in the intervention group. However, "compliance" was successfully quitting with incentives, and the CACE analysis yielded an identical result, causal birth weight increase 21 g ÷ 0.143 = 145 g. CONCLUSIONS: Policy makers have great difficulty giving pregnant women money to stop smoking. This study indicates that a small clinically insignificant improvement in average birth weight is likely to hide an important clinically significant increase in infants born to pregnant smokers who want to stop but cannot achieve smoking cessation without the addition of financial voucher incentives. TRIAL REGISTRATION: ISRCTN Registry, ISRCTN87508788 . Registered on 1 September 2011.

Representativeness of the participants in the smoking Cessation in Pregnancy Incentives Trial (CPIT): a cross-sectional study.

BACKGROUND: The limited representativeness of trial samples may restrict external validity. The aim of this study was to ascertain the representativeness of the population enrolled in the Cessation in Pregnancy Incentives Trial (CPIT), a therapeutic exploratory study to examine the effectiveness of financial incentives for smoking cessation during pregnancy. METHODS: CPIT participants (n = 492) were compared with all self-reported smokers at maternity booking who did not participate in the trial (n = 1982). Both groups were drawn from the National Health Service (NHS) Greater Glasgow and Clyde area over a 1-year trial enrolment period. Variables used for comparison were age, area-based deprivation index, body mass index, gestation, and carbon monoxide (CO) breath test level. Chi-square and Mann-Whitney U tests were used to compare groups. RESULTS: From January to December 2012, 2474/13,945 (17.7 %) women, who booked for maternity care, self-reported as current smokers (at least one cigarette in the last week). Seven hundred and fifty-two were ineligible for trial participation because of a CO breath test level of less than 7 parts per million (ppm) used as a biochemical cut-off to corroborate self-report of current smoking. At telephone consent 301 could not be contacted, 11 had miscarried, 16 did not give consent and 3 opted out after randomisation, leaving 492 participants for analysis. There were no differences in demographic or clinical characteristics between trial participants, and self-reported smokers not enrolled in the trial in terms of CO breath test (as a measure of smoking level for those with a CO level of 7 ppm or higher), material deprivation (using an area-based measure), maternal age and maternal body mass index. Gestation at booking was statistically significantly lower for participants. CONCLUSIONS: To ensure that all trial participants were smokers, biochemical validation excluded self-reported smokers with a CO level of less than 7 ppm from taking part in the trial, which excluded 30 % of self-reported smokers who were 'lighter' smokers. The efficacy of financial incentives would not have been likely to decrease if 'lighter' smokers had been included in the trial population. Trial participants were slightly earlier in their pregnancy at maternity booking, but this difference would not clinically affect the provision of financial incentives if provided routinely. Overall, the trial population was representative of all self-reported smokers with regard to available routinely collected data. Appropriate comparison of trial and target populations, with detailed reporting of exclusion criteria would contribute to the understanding of the wider applicability of trial results. TRIAL REGISTRATION: Current Controlled Trials ISRCTN87508788 . Registered/Assigned on 1 September 2011.

Breastfeeding is associated with reduced childhood hospitalization: evidence from a Scottish Birth Cohort (1997-2009).

OBJECTIVE: To evaluate the risk of childhood hospitalization associated with infant feeding patterns at 6-8 weeks of age in Scotland. STUDY DESIGN: A retrospective population level study based on the linkage of birth, death, maternity, infant health, child health surveillance, and admission records for children born as single births in Scotland between 1997 and 2009 (n = 502 948) followed up to March 2012. Descriptive analyses, Kaplan Meier tests, and Cox regression were used to quantify the association between the mode of infant feeding and risk of childhood hospitalization for respiratory, gastrointestinal, and urinary tract infections, and other common childhood ailments during the study period. RESULTS: Within the first 6 months of life, there was a greater hazard ratio (HR) of hospitalization for common childhood illnesses among formula-fed infants (HR 1.40; 95% CI 1.35-1.45) and mixed-fed infants (HR 1.18; 95% CI 1.11-1.25) compared with infants exclusively breastfed after adjustment for parental, maternal, and infant health characteristics. Within the first year of life and beyond, a greater relative risk of hospitalization was observed among formula-fed infants for a range of individual illnesses reported in childhood including gastrointestinal, respiratory, and urinary tract infections, otitis media, fever, asthma, diabetes, and dental caries. CONCLUSIONS: Using linked administrative data, we found greater risks of hospitalization in early childhood for a range of common childhood illnesses among Scottish infants who were not exclusively breastfed at 6-8 weeks of age.

Reduced fetal growth in methadone-maintained pregnancies is not fully explained by smoking or socio-economic deprivation.

AIM: To determine if reduced fetal growth in infants of opioid-dependent mothers prescribed methadone maintenance in pregnancy is explained by cigarette smoking or socio-economic deprivation. DESIGN: Retrospective cohort study. SETTING: Inner-city maternity unit in Scotland. PARTICIPANTS: A total of 366 singleton infants of methadone-prescribed opioid-dependent mothers compared with the Scottish birth population (n=103 366) as a whole. MEASUREMENTS: Primary outcome measures were birth weight and head circumference. FINDINGS: In infants of methadone-prescribed opioid-dependent mothers mean birth weight was 259 g [95% confidence interval (CI) 214-303 g; P<0.0001] less, and mean head circumference 1.01 cm (95% CI 0.87-1.15 cm; P<0.0001) less than in controls, allowing for gestation, cigarette smoking, area deprivation, infant sex and maternal age and parity. This represents an adjusted difference of -0.61 (95% CI -0.52--0.71; P<0.0001) Z-score in mean birth weight and -0.77 (95% CI -0.66--0.89; P<0.0001) Z-score in mean head circumference. CONCLUSIONS: Reduced fetal growth in infants of opioid-dependent mothers prescribed methadone maintenance in pregnancy is not fully explained by cigarette smoking, area deprivation, maternal age or parity.

Bed sharing when parents do not smoke: is there a risk of SIDS? An individual level analysis of five major case-control studies.

OBJECTIVE: To resolve uncertainty as to the risk of Sudden Infant Death Syndrome (SIDS) associated with sleeping in bed with your baby if neither parent smokes and the baby is breastfed. DESIGN: Bed sharing was defined as sleeping with a baby in the parents' bed; room sharing as baby sleeping in the parents' room. Frequency of bed sharing during last sleep was compared between babies who died of SIDS and living control infants. Five large SIDS case-control datasets were combined. Missing data were imputed. Random effects logistic regression controlled for confounding factors. SETTING: Home sleeping arrangements of infants in 19 studies across the UK, Europe and Australasia. PARTICIPANTS: 1472 SIDS cases, and 4679 controls. Each study effectively included all cases, by standard criteria. Controls were randomly selected normal infants of similar age, time and place. RESULTS: In the combined dataset, 22.2% of cases and 9.6% of controls were bed sharing, adjusted OR (AOR) for all ages 2.7; 95% CI (1.4 to 5.3). Bed sharing risk decreased with increasing infant age. When neither parent smoked, and the baby was less than 3 months, breastfed and had no other risk factors, the AOR for bed sharing versus room sharing was 5.1 (2.3 to 11.4) and estimated absolute risk for these room sharing infants was very low (0.08 (0.05 to 0.14)/1000 live-births). This increased to 0.23 (0.11 to 0.43)/1000 when bed sharing. Smoking and alcohol use greatly increased bed sharing risk. CONCLUSIONS: Bed sharing for sleep when the parents do not smoke or take alcohol or drugs increases the risk of SIDS. Risks associated with bed sharing are greatly increased when combined with parental smoking, maternal alcohol consumption and/or drug use. A substantial reduction of SIDS rates could be achieved if parents avoided bed sharing.

The cessation in pregnancy incentives trial (CPIT): study protocol for a randomized controlled trial.

BACKGROUND: Seventy percent of women in Scotland have at least one baby, making pregnancy an opportunity to help most young women quit smoking before their own health is irreparably compromised. By quitting during pregnancy their infants will be protected from miscarriage and still birth as well as low birth weight, asthma, attention deficit disorder and adult cardiovascular disease. In the UK, the NICE guidelines: 'How to stop smoking in pregnancy and following childbirth' (June 2010) highlighted that little evidence exists in the literature to confirm the efficacy of financial incentives to help pregnant smokers to quit. Its first research recommendation was to determine: Within a UK context, are incentives an acceptable, effective and cost-effective way to help pregnant women who smoke to quit? DESIGN AND METHODS: This study is a phase II exploratory individually randomized controlled trial comparing standard care for pregnant smokers with standard care plus the additional offer of financial voucher incentives to engage with specialist cessation services and/or to quit smoking during pregnancy.Participants (n = 600) will be pregnant smokers identified at maternity booking who, when contacted by specialist cessation services, agree to having their details passed to the NHS Smokefree Pregnancy Study Helpline to discuss the trial. The NHS Smokefree Pregnancy Study Helpline will be responsible for telephone consent and follow-up in late pregnancy. The primary outcome will be self reported smoking in late pregnancy verified by cotinine measurement. An economic evaluation will refine cost data collection and assess potential cost-effectiveness while qualitative research interviews with clients and health professionals will assess the level of acceptance of this form of incentive payment. The research questions are: What is the likely therapeutic efficacy? Are incentives potentially cost-effective? Is individual randomization an efficient trial design without introducing outcome bias? Can incentives be introduced in a way that is feasible and acceptable? DISCUSSION: This phase II trial will establish a workable design to reduce the risks associated with a future definitive phase III multicenter randomized controlled trial and establish a framework to assess the costs and benefits of financial incentives to help pregnant smokers to quit. TRIAL REGISTRATION: Current Controlled Trials ISRCTN87508788.

Smoking prevalence and smoking cessation services for pregnant women in Scotland.

BACKGROUND: Over 20% of women smoke throughout pregnancy despite the known risks to mother and child. Engagement in face-to-face support is a good measure of service reach. The Scottish Government has set a target that by 2010 8% of smokers will have quit via NHS cessation services. At present less than 4% stop during pregnancy. We aimed to establish a denominator for pregnant smokers in Scotland and describe the proportion who are referred to specialist services, engage in one-to-one counselling, set a quit date and quit 4 weeks later. METHODS: This was a descriptive epidemiological study using routinely collected data supplemented by questionnaire information from specialist pregnancy cessation services. RESULTS: 13266 of 52370 (25%) pregnant women reported being current smokers at maternity booking and 3133/13266 (24%) were referred to specialist cessation services in 2005/6. Two main types of specialist smoking cessation support for pregnant women were in place in Scotland. The first involved identification using self-report and carbon monoxide breath test for all pregnant women with routine referral (1936/3352, 58% referred) to clinic based support (386, 11.5% engaged). 370 (11%) women set a quit date and 116 (3.5%) had quit 4 weeks later. The second involved identification by self report and referral of women who wanted help (1195/2776, 43% referred) for home based support (377/1954, 19% engaged). 409(15%) smokers set a quit date and 119 (4.3%) had quit 4 weeks later. Cost of home-based support was greater. In Scotland only 265/8062 (3.2%) pregnant smokers identified at maternity booking, living in areas with recognised specialist or good generic services, quit smoking during 2006. CONCLUSIONS: In Scotland, a small proportion of pregnant smokers are supported to stop. Poor outcomes are a product of current limitations to each step of service provision--identification, referral, engagement and treatment. Many smokers are not asked about smoking at maternity booking or provide false information. Carbon monoxide breath testing can bypass this difficulty. Identified smokers may not be referred but an opt-out referral policy can remove this barrier. Engagement at home allowed a greater proportion to set a quit date and quit, but costs were higher.

'Breathe': the stop smoking service for pregnant women in Glasgow.

OBJECTIVE: to develop a pragmatic service for pregnant smokers. DESIGN: identification and referral of pregnant smokers to specialist services using self-report gathered on routine pregnancy booking questionnaire augmented by a carbon monoxide breath test. Engagement by specialist smoking cessation midwives using telephone contact with the offer of clinic-based counselling for women who want help. Telephone support and pharmacy provision of nicotine replacement therapy for women who decide to quit. SETTING: three maternity units serving Glasgow in the West of Scotland. PARTICIPANTS: a relatively deprived population of 12,000 pregnant women each year in Glasgow. INTERVENTIONS: at maternity booking, women with either a carbon monoxide breath test result >7 parts per million or self-reporting to be a current smoker during the routine pregnancy booking questionnaire were identified as smokers. All smokers were referred on to the specially trained midwives who provided an opt-out smoking cessation intervention. This involved motivational interviewing to engage pregnant smokers during telephone contact. Women considering quitting were invited for a follow-up face-to-face meeting in a clinic setting. Women who set a quit date were offered withdrawal oriented therapy augmented by pharmacy-based nicotine replacement therapy. FINDINGS: booking midwives found it difficult to approach all pregnant women to talk about smoking. This was not made easier by the service requirement that all pregnant women should provide a carbon monoxide breath test at maternity booking. In one hospital, auxiliary nurses performed the carbon monoxide breath test and 2879 of 3219 (89%) women booking for antenatal care provided a sample, allowing most smokers to be identified. In another hospital where the carbon monoxide test was administered by midwives, only 1968 of 5570 (35%) women provided a carbon monoxide breath test sample; 61% of pregnant smokers were not identified and referred to specialist services. Of the 1936 pregnant smokers referred from all three hospitals, 386 (20%) attended a face-to-face appointment with specialist smoking cessation midwives, 370 (19%) set a quit date and 117 (6%) had quit 4 weeks after their quit date. IMPLICATIONS FOR PRACTICE: this service development provides a pragmatic approach to identify nearly all pregnant smokers at maternity booking, and an opt-out model to refer them to specialist smoking cessation services. Further research is required to establish if extra auxiliary staff in maternity booking clinics can optimise the identification and referral of pregnant smokers to specialist smoking cessation services. This telephone- and clinic-based specialist service engaged 20% of referred pregnant smokers to attend a face-to-face appointment with a specialist smoking cessation midwife. Further research is required to assess if home-based support would engage a greater proportion of pregnant smokers, or if an incentive scheme would achieve the same aim. In total, 117 of 370 (32%) women who set a quit date had quit smoking 4 weeks later, which compares fairly well with a figure of 40% for pregnant smokers in the English smoking treatment services.

Reliability of self reported smoking status by pregnant women for estimating smoking prevalence: a retrospective, cross sectional study.

OBJECTIVE: To determine what impact reliance on self reported smoking status during pregnancy has on both the accuracy of smoking prevalence figures and access to smoking cessation services for pregnant women in Scotland. DESIGN: Retrospective, cross sectional study of cotinine measurements in stored blood samples. PARTICIPANTS: Random sample (n=3475) of the 21 029 pregnant women in the West of Scotland who opted for second trimester prenatal screening over a one year period. MAIN OUTCOME MEASURE: Smoking status validated with cotinine measurement by maternal area deprivation category (Scottish Index of Multiple Deprivation). RESULTS: Reliance on self reported smoking status underestimated true smoking by 25% (1046/3475 (30%) from cotinine measurement v 839/3475 (24%) from self reporting, z score 8.27, P<0.001). Projected figures suggest that in Scotland more than 2400 pregnant smokers go undetected each year. A greater proportion of smokers in the least deprived areas (deprivation categories 1+2) did not report their smoking (39%) compared with women in the most deprived areas (22% in deprivation categories 4+5), but, because smoking was far more common in the most deprived areas (706 (40%) in deprived areas compared with 142 (14%) in affluent areas), projected figures for Scotland suggest that twice as many women in the most deprived areas are undetected (n=1196) than in the least deprived areas (n=642). CONCLUSION: Reliance on self reporting to identify pregnant smokers significantly underestimates the number of pregnant smokers in Scotland and results in a failure to detect over 2400 smokers each year who are therefore not offered smoking cessation services.

CATCH: development of a home-based midwifery intervention to support young pregnant smokers to quit.

OBJECTIVE: to develop, implement and evaluate a supportive midwifery intervention, Community Action on Tobacco for Children's Health (CATCH), to help young pregnant smokers to quit. DESIGN: action research project funded from April 2002 to June 2005. SETTING AND PARTICIPANTS: CATCH was based in a single hospital maternity unit in the West of Scotland and targeted a deprived population of pregnant smokers aged 25 years and under. Outreach work was undertaken in the local community and cessation support was provided in women's own homes. INTERVENTION: CATCH aimed to meet the particular needs of young pregnant women through a tailored, non-judgmental approach. The service was distinctive as it employed a holistic approach to smoking cessation which focused not only on individual choices and motivations, but on the wider life circumstances that may preclude behaviour change. MEASURES: internal and external teams collaborated to ensure a comprehensive evaluation, gathering of both process and outcome data. Outcomes (including self-reported and carbon monoxide validated quit status) were assessed by quantitative surveys undertaken at enrolment to the service and at 3- and 12-month follow-up. All those lost to follow-up were assumed to still be smoking. Participants' views of the service were gathered independently by an external evaluation team, and a detailed qualitative case study, capturing ongoing learning, was undertaken. Data were collected from participants who joined the project over a 16-month period (November 2002-February 2004). FINDINGS: the study demonstrated a feasible approach to engaging young pregnant smokers to help them quit. Obstetricians and midwives were willing to refer to a service based in their maternity unit run by a specially trained midwife, and users reported a positive experience of the service. Of 152 eligible clients referred within the 16-month period, 79 (52%) joined CATCH. Of those who joined, 18 (22.8%) were self-reported non-smokers at 3 months, of whom 16 (20.3%) were validated as non-smokers using carbon monoxide monitoring. Thirteen (16.5%) clients reported being smoke free at 12 months, of whom 10 (12.7%) were validated as non-smokers at 12 months. IMPLICATIONS FOR PRACTICE: CATCH suggests that close partnership with the multi-disciplinary maternity team and integration into the maternity system is invaluable for smoking cessation services targeting pregnant women. It points to the benefits of the service being delivered by a trained midwife in clients' own homes. Flexibility and a non-judgmental approach are essential to engagement. Attention to the context and wider circumstances of clients' lives and involving friends and family enables clients to focus on their own smoking.

Infant feeding attitudes and knowledge among socioeconomically disadvantaged women in Glasgow.

OBJECTIVES: This study: (1) investigated infant feeding attitudes and knowledge among socioeconomically disadvantaged mothers in an urban community with historically low breastfeeding rates, (2) examined the influence of women's social networks on infant feeding attitudes and decisions, and (3) validated a measure of infant feeding attitudes and knowledge in this population (Iowa Infant Feeding Attitude Scale, IIFAS). METHODS: Women attending a prenatal clinic (n=49) reported on: (1) demographics, (2) infant feeding attitudes and knowledge (IIFAS), (3) feeding intent, (4) opinions about breastfeeding in public, and (5) social networks. Feeding method at discharge was abstracted from hospital charts. Social network members (n=47) identified by the prenatal sample completed interviews covering: (1) demographics, (2) infant feeding attitudes and knowledge (IIFAS), (3) prior infant feeding methods and recommendations, and (4) opinions about breastfeeding in public. RESULTS: Mean IIFAS scores were low in both groups, indicating neutral to negative breastfeeding attitudes; mothers' scores were lower than social network members. Higher maternal IIFAS score was significantly associated with intended and actual breastfeeding. A social network positive towards breastfeeding was significantly associated with mothers' positive attitude towards breastfeeding. Both mothers and social network members support breastfeeding in public. IIFAS internal consistency was robust for both mothers and social network members. Predictive validity was demonstrated by significant positive association between score and intended and actual feeding methods. CONCLUSIONS: Knowledge and attitude predict breastfeeding initiation in this population. Social network members may influence mothers' feeding choices. This research is important because attitudes and knowledge derived from the IIFAS can be used to develop and evaluate breastfeeding promotion programs.

Do poor nutrition and display screens affect visual acuity in children?

Two studies conducted in Scotland have shown an increase in visual acuity (VA) screening failure among primary school-aged children in recent years. Two other trends were observed during the same period - an increase in children bringing packed lunches to school, and increased access to display screen equipment (DSE) including television, computers and hand-held computer games. This study set out to assess if either DSE use of poor diet could be linked with visual acuity screening failure in Scottish primary school children. Information was collected on diet and DSE use from 1384 children who had received VA screening in eight primary schools in Glasgow. After controlling for deprivation, DSE use other than watching television was associated with an increased risk of VA screening failure, as was a 'poor' diet. If these findings are confirmed by other studies and a causal link can be made, then health education at school could be designed to prevent VA screening failure.