Publications by authors named "Kiran Nanchahal"

Background: Placing limitations on advertising of food and nonalcoholic drinks to children is an effective strategy in addressing childhood obesity. The industry maintains that further restrictions are unnecessary.

Aims: To ascertain whether the advertising campaigns were successful according to the industry evaluations and more specifically the effects of marketing on children.

View Article and Find Full Text PDF

Background: Variations in the delivery of content and process can alter the effectiveness of complex interventions. This study examined the fidelity of a weight loss intervention (Camden Weight Loss) from recorded consultations by assessing advisors' delivery of content, use of motivational interviewing approach and therapeutic alliance.

Methods: A process evaluation was conducted of advisor-participant consultations in a 12-month randomised controlled trial of an intervention for adult volunteers with a body mass index categorised as overweight or obese.

View Article and Find Full Text PDF

The role of the neighbourhood environment in influencing health behaviours continues to be an important topic in public health research and policy. Foot-based street audits, virtual street audits and secondary data sources are widespread data collection methods used to objectively measure the built environment in environment-health association studies. We compared these three methods using data collected in a nationally representative epidemiological study in 17 British towns to inform future development of research tools.

View Article and Find Full Text PDF

Background: Overweight and obesity are major public health problems and an increasing global challenge. In lieu of wider policy changes to tackle the obesogenic environment in which we presently reside, improving the design of individual-level weight loss interventions is important.

Aim: To identify which aspects of the Camden Weight Loss randomized controlled trial weight loss intervention participants engaged with, with the aim of improving the design of future studies and maximizing retention.

View Article and Find Full Text PDF

A growing body of literature explores the relationship between the built environment and health, and the methodological challenges of understanding these complex interactions across the lifecourse. The impact of the neighbourhood environment on health and behaviour amongst older adults has received less attention, despite this age group being potentially more vulnerable to barriers in their surrounding social and physical environment. A qualitative geographical information systems (QGIS) approach was taken to facilitate the understanding of how older people over 70 in 5 UK towns interact with their local neighbourhood.

View Article and Find Full Text PDF

Objectives: The aim of this study was to investigate the rate of and factors contributing to non-adherence to hearing-aid use in the UK National Health Service.

Design: A cross-sectional postal questionnaire survey.

Study Sample: A questionnaire, including the International Outcome Inventory for Hearing Aids, was sent to all patients fitted with hearing aids at the Royal Surrey County Hospital between 2011 and 2012 (N = 1874).

View Article and Find Full Text PDF

Objectives: This qualitative study examines performance bias, i.e. unintended differences between groups, in the context of a weight loss trial in which a novel patient counseling program was compared to usual care in general practice.

View Article and Find Full Text PDF

Objectives: To evaluate effectiveness of a structured one-to-one behaviour change programme on weight loss in obese and overweight individuals.

Design: Randomised controlled trial.

Setting: 23 general practices in Camden, London.

View Article and Find Full Text PDF

Background: One of the challenges when undertaking economic evaluations of weight management interventions is to adequately assess future health impacts. Clinical trials commonly measure impacts using surrogate outcomes, such as reductions in body mass index, and investigators need to decide how these can best be used to predict future health effects. Since obesity is associated with an increased risk of numerous chronic diseases occurring at different future time points, modelling is needed for predictions.

View Article and Find Full Text PDF

A study was undertaken of the views of users of two genitourinary medicine (GUM) clinics in England on unlinked anonymous testing (UAT) for HIV. The UAT programme measures the prevalence of HIV in the population, including undiagnosed prevalence, by testing residual blood (from samples taken for clinical purposes) which is anonymised and irreversibly unlinked from the source. 424 clinic users completed an anonymous questionnaire about their knowledge of, and attitudes towards, UAT.

View Article and Find Full Text PDF

Objective: To develop and pilot a communication aid aimed at increasing the frequency with which sexual health issues are raised proactively with young people in primary care.

Methods: Group interviews among primary health care professionals to guide development of the tool, simulated consultations to pre-test it, and a pilot study to assess effectiveness.

Results: We developed an electronic consultation aid: Talking of Sex and piloted it in eight general practices across the UK.

View Article and Find Full Text PDF

Background: There is a paucity of randomised controlled trials of weight management in primary care.

Aim: To ascertain the feasibility of a full trial of a nurse-led weight-management programme in general practice.

Design Of Study: Factorial randomised control trial.

View Article and Find Full Text PDF

Background: In epidemiologic studies of sexual partnerships, characteristics are often collected in part through detailed questions concerning recent partnerships. These data present challenges for analysis. First, although research interest generally lies in all partnerships in a certain time period, participants may be asked to provide detailed information only concerning their most recent, up to a fixed number.

View Article and Find Full Text PDF

Aims: This paper describes prevalences, time-trends and characteristics of self-reported never-drinkers, during the period 1994-2003, focussing particularly on white adults aged 18-54.

Methods: Data on 122,809 adults (18 + ) were obtained from the Health Survey for England (HSfE). Logistic regressions were used to estimate time trends in self-reported never-drinking, and associations between never-drinking and living alone, and educational qualification.

View Article and Find Full Text PDF

Objectives: Our objective was to compare data on contraceptive use in relation to reported sexual activity in women from different minority ethnic groups.

Design: We analyzed the National Survey of Sexual Attitudes and Lifestyles 2000.

Subjects: Women aged 16-44 years, numbering 6932 and residing in Britain, participated in this study.

View Article and Find Full Text PDF

To date, the focus of sex education research has tended to be on the effect of education on behavioral outcomes. There is little data on the felt needs of young people, how well they are met, and how provision might be improved. Here we report on main source of information about sexual matters, adequacy of knowledge, further needs, and preferred source of additional information, using data from a probability sample survey of people aged 16 to 44 years in Britain (Natsal 2000).

View Article and Find Full Text PDF

Objectives: To assess correlates of asymptomatic gonorrhea among patients attending Genitourinary Medicine Clinics participating in the Gonococcal Resistance to Antimicrobials Surveillance Programme (GRASP) in England for 2001-2003.

Study Design: GRASP is a sentinel surveillance program that monitors antimicrobial resistance to Neisseria gonorrhoeae. Data collection occurs annually in June to August each year.

View Article and Find Full Text PDF

Objectives: To assess changes between 1990 and 2000 in the circumstances of women who became mothers before the age of 18.

Design: Two cross sectional probability sample surveys of the general population carried out in 1989-1991 (Natsal 1990) and 1999-2001 (Natsal 2000).

Setting: British households.

View Article and Find Full Text PDF

Background: Noninvasive molecular tests for bacterial sexually transmitted infections (STIs) provide new opportunities for testing in nonclinical settings. Little information is available on the outcomes when applied to asymptomatic sex survey participants.

Objective: The objective of this study was to examine patient treatment preferences and partner notification outcomes among Chlamydia trachomatis-positive cases identified in the 2000 national survey of sexual attitudes and lifestyles (Natsal 2000), and factors associated with providing a urine sample.

View Article and Find Full Text PDF

Background: Ethnic variations in the rate of diagnosed sexually transmitted infections (STIs) have been reported in many developed countries. We used data from the second British National Survey of Sexual Attitudes and Lifestyles (Natsal 2000) to investigate the frequency of high-risk sexual behaviours and adverse sexual health outcomes in five ethnic groups in Great Britain.

Methods: We did a stratified probability sample survey of 11161 men and women aged 16-44 years, resident in Great Britain, using computer-assisted interviews.

View Article and Find Full Text PDF

Background: We examined attendance at sexually transmitted disease (STD) clinics and the prevalence, distribution, and associated demographic and behavioral factors of self-reported sexually transmitted infections (STIs) in a population survey of sexual attitudes and lifestyles.

Methods: We analyzed data from stratified probability sample surveys obtained through the British National Surveys of Sexual Attitudes and Lifestyles (Natsal), which was undertaken in 1990 (n=13,765) and 2000 (n=11,161) among men and women aged 16-44 years. National STD surveillance data for 1999 were used to determine disease- and risk factor-specific proportionate population burden (PPB).

View Article and Find Full Text PDF