Objectives: To examine the relationship between socio-economic position and height in early adulthood. Method: A representative probability sample of Australian households (par t of the 1995 National Health Sur vey). Data were collected by face-to-face interviews. Socio-economic position was measured using occupation and family income.Participants comprised 9,577 Australianbor n males and females aged 20-24 (n=3,186), 25-29 (n=3,184), and 30-34 (n=3,207). Height was self-reported and operationalised in terms of mean height and 'short' stature (defined as 1 SD below mean height for each sex-age subgroup). Results: Graded, positive associations were found between occupation, family income, and height for males and females in each age cohort. Among males, mean height differences between blue-collar employees and professionals were 1.1 cm to 1.5 cm (depending on age-cohor t), and for females, 1.6 cm to 2.1 cm. The corresponding height differences for males and females living in the least and most affluent families were 1.6 cm to 2.3 cm, and 1.0 cm to 2.5 cm, respectively. Persons in blue-collar jobs and those in low-income families were more likely to be classified as 'short'.
Conclusions and implications:Estimates of mortality risk associated with short stature suggest that these height differences translate to about a 2-5% increased risk of death for the most disadvantaged g roups. Given that socioeconomic height differences in adulthood have their genesis in the formative stages of biological and social development, public health intervention efforts need to focus on early life exposures and environments. The greatest reduction in height inequalities, and by extension health inequalities, is likely to flow from macro-level public policies to alleviate poverty and minimise the social and economic divide. (Aust N Z J Public Health 2002; 26: 468-72) height in early adulthood, therefore, will strongly suggest differential e xposure to socio-economic conditions in infancy and childhood and may also be predictive of later life socio-economic inequalities in respiratory and cardiovascular disease for this cohort. 14
Method
Data sourceData were collected by the Australian Bureau of Statistics (ABS) as part of the 1995 National Health Survey (NHS). Full details of the survey's scope and coverage, its research design, sampling procedures and data collection methods have been documented elsewhere. 15 Only a brief overview is provided here.
Sample designThe NHS covered urban and rural areas across all States and Ter ritories and included non-institutionalised residents of both private (houses, flats, caravans, etc) and nonprivate (hotels, hostels, boarding houses) dwellings. A total of 23,817 dwellings were included in the original sample, representing approximately one in 310 of the Australian population. The dwellings were randomly selected using a stratified multistage area design. After excluding refusals, non-contacts and other non-responding groups, the final sample consisted of 21,787 dwellings (91.5% r...