How far can we explain the social class differential in respiratory function? A cross-sectional population study of 21,991 men and women from EPIC-Norfolk.

TitleHow far can we explain the social class differential in respiratory function? A cross-sectional population study of 21,991 men and women from EPIC-Norfolk.
Publication TypeJournal Article
Year of Publication2009
AuthorsMcFadden, E, Luben, R, Wareham, N, Bingham, S, Khaw, K-T
JournalEur J Epidemiol
Volume24
Issue4
Pagination193-201
Date Published2009
ISSN1573-7284
KeywordsAdult, Aged, Analysis of Variance, Ascorbic Acid, Cohort Studies, Confidence Intervals, Cross-Sectional Studies, Female, Forced Expiratory Volume, Health Status Disparities, Humans, Logistic Models, Lung, Male, Middle Aged, Occupations, Odds Ratio, Risk Factors, Sex Factors, Social Class, United Kingdom
Abstract

The objective of this study is to investigate the association between occupational social class and respiratory function, as measured by forced expiratory volume in one-second (FEV(1)). We examined the cross sectional relationship between lung function and social class in a population study of 21,991 men and women aged 39-79 years living in the general community in Norfolk, United Kingdom, recruited using general practice age-sex registers in 1993-1997. There was a significant socioeconomic gradient in age adjusted lung function with a difference of 0.37 in mean FEV(1) in men and 0.20 in women, respectively between social class I and V. The age adjusted OR for having poor lung function was 4.13 (95% CI 2.66-6.42) in men and 2.64 (95% CI 1.74-3.99) in women for social class V compared to I. This difference was substantially attenuated after adjustment for height, weight, smoking status, respiratory illness, educational level, living in a deprived area, physical activity and plasma vitamin C levels. There was a strong socioeconomic gradient in respiratory function. In men the gradient appeared to be largely explained by smoking status and height; in women a large part of the gradient was explained by potentially modifiable factors. This suggests that socioeconomic inequalities in respiratory function may be preventable or modifiable and highlights factors for further exploration.

DOI10.1007/s10654-009-9326-y
Alternate JournalEur. J. Epidemiol.
Citation Key10.1007/s10654-009-9326-y
PubMed ID19288214
Grant ListG0401527 / / Medical Research Council / United Kingdom
MC_U106179471 / / Medical Research Council / United Kingdom
/ / British Heart Foundation / United Kingdom
/ / Cancer Research UK / United Kingdom