Integrating national surveys to estimate small area variations in poor health and limiting long-term illness in Great Britain

OBJECTIVES

This study aims to address, for the first time, the challenges of constructing small area estimates of health status using linked national surveys. The study also seeks to assess the concordance of these small area estimates with data from national censuses.

SETTING

Population level health status in England, Scotland and Wales.

PARTICIPANTS

A linked integrated dataset of 23 374 survey respondents (16+ years) from the 2011 waves of the Health Survey for England (n=8603), the Scottish Health Survey (n=7537) and the Welsh Health Survey (n=7234).

PRIMARY AND SECONDARY OUTCOME MEASURES

Population prevalence of poorer self-rated health and limiting long-term illness. A multilevel small area estimation modelling approach was used to estimate prevalence of these outcomes for middle super output areas in England and Wales and intermediate zones in Scotland. The estimates were then compared with matched measures from the contemporaneous 2011 UK Census.

RESULTS

There was a strong positive association between the small area estimates and matched census measures for all three countries for both poorer self-rated health (r=0.828, 95% CI 0.821 to 0.834) and limiting long-term illness (r=0.831, 95% CI 0.824 to 0.837), although systematic differences were evident, and small area estimation tended to indicate higher prevalences than census data.

CONCLUSIONS

Despite strong concordance, variations in the small area prevalences of poorer self-rated health and limiting long-term illness evident in census data cannot be replicated perfectly using small area estimation with linked national surveys. This reflects a lack of harmonisation between surveys over question wording and design. The nature of small area estimates as 'expected values' also needs to be better understood.

Young women's perceived health and lifetime sexual experience: results from the national survey of family growth

INTRODUCTION

Sexuality is a component of health and well-being for all women, including adolescents. Yet relationships between young women's health perceptions and sexual behavior are unclear.

AIM

We examined associations between perceived health and lifetime sexual experiences among young U.S. women.

METHODS

We used data from 4,413 young women ages 15-24 years in the National Survey of Family Growth, 2002-2008. Descriptive, bivariate, and multivariate statistics estimated relationships between categories of perceived health and types of lifetime sexual experience.

MAIN OUTCOME MEASURES

A self-rated health Likert item and sexual history questions were administered with a computer-assisted survey instrument.

RESULTS

Young women reported excellent (30%), very good (41%), good (23%), and fair-poor (6%) health. Sexual experiences included vaginal (64%), oral (64%), and anal (20%) sex. Negative experiences included involuntary sex (11%) and sexually transmitted infection (STI) history (8%). In multivariate logistic regression models, lower perceived health ("good" rather than "excellent") was positively associated with vaginal (odds ratio [OR] 1.5, confidence interval [CI] 1.1-2.1, P = 0.02), oral (OR 1.5, CI 1.1-2.1, P = 0.005), and anal (OR 1.4, CI 1.0-2.0, P = 0.03) sex. In models stratified by age, point estimates for vaginal (OR 1.8, CI 1.2-2.6, P = 0.002) and oral (OR 1.9, CI 1.4-2.6, P < 0.001) sex were higher among adolescents ages 15-19 years, but associations were insignificant among young adults ages 20-24 years. When controlling for negative sexual experiences, point estimates were stable in models including STI history but statistically insignificant when including involuntary sexual experience. Other characteristics associated with sexual experiences varied by type of experience and included age, race/ethnicity, employment situation, poverty level, insurance status, childhood family situation, religious service participation, cohabitation/marital experience, and body mass index.

CONCLUSIONS

  Further investigation is warranted to disentangle potentially negative relationships between perceived health (as well as response bias and more objective health outcomes), sociodemographic factors, and diverse sexual experiences among young women in the United States.