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Prevalence and correlates of foot pain in a population-based study: the North West Adelaide health study
© Hill et al; licensee BioMed Central Ltd. 2008
Received: 29 May 2008
Accepted: 28 July 2008
Published: 28 July 2008
Few population-based studies have examined the prevalence of foot pain in the general community. The aims of this study were therefore to determine the prevalence, correlates and impact of foot pain in a population-based sample of people aged 18 years and over living in the northwest region of Adelaide, South Australia.
The North West Adelaide Health Study is a representative longitudinal cohort study of n = 4,060 people randomly selected and recruited by telephone interview. The second stage of data collection on this cohort was undertaken between mid 2004 and early 2006. In this phase, information regarding the prevalence of musculoskeletal conditions was included. Overall, n = 3,206 participants returned to the clinic during the second visit, and as part of the assessment were asked to report whether they had pain, aching or stiffness on most days in either of their feet. Data were also collected on body mass index (BMI); major medical conditions; other joint symptoms and health-related quality of life (the Medical Outcomes Study Short Form 36 [SF-36]).
Overall, 17.4% (95% confidence interval 16.2 – 18.8) of participants indicated that they had foot pain, aching or stiffness in either of their feet. Females, those aged 50 years and over, classified as obese and who reported knee, hip and back pain were all significantly more likely to report foot pain. Respondents with foot pain scored lower on all domains of the SF-36 after adjustment for age, sex and BMI.
Foot pain affects nearly one in five of people in the community, is associated with increased age, female sex, obesity and pain in other body regions, and has a significant detrimental impact on health-related quality of life.
Foot pain has long been recognised as highly prevalent in older people, affecting approximately one in three people aged over 65 years [1–3]. In older people, foot pain is associated with decreased ability to undertake activities of daily living, problems with balance and gait, and an increased risk of falls [4–6]. The prevalence of foot pain in other age-groups, however, has not been as widely studied. The 1990 US National Health Interview Survey of 119,631 people aged over 18 years included a podiatry supplement and found that 24% of the sample reported foot "trouble" . More recently, a random community-based sample of 3,417 people drawn from a general practice register in the UK found that 10% of study participants aged 18 to 80 years had "disabling" foot pain , and a community-based postal survey of 16,222 people aged over 55 years found that 18% reported joint pain, swelling and/or stiffness in their feet .
Although several studies in relatively small samples of older people have been undertaken [3, 10, 11], the prevalence of foot pain in the general Australian population has never been thoroughly examined. Therefore, the aims of our study were to determine the prevalence of foot pain in a population-based sample, to explore associations between age, sex, major medical conditions, other chronic joint symptoms and foot pain, and to assess the impact of foot pain on health-related quality of life.
Setting and study population
The North West Adelaide Health Study (NWAHS) was established in 2000 in the North-West region of Adelaide, South Australia . The north-west region of Adelaide comprises approximately half of the population of the city of Adelaide and a third of the population of the state of South Australia. The regions also reflect the demographic profile of the state, covering a broad range of ages and socioeconomic areas. The study was designed in response to a need to assess the prevalence of priority conditions and examine their progression over time in a population-based community-dwelling cohort, to inform policy decisions about health care provision in South Australia.
Participants for Stage 1 of the study (which was conducted between 2000 and July 2003) were recruited randomly from the Electronic White Pages telephone listings and an initial telephone interview was conducted. Those within each household who were last to have a birthday and aged 18 years and over were interviewed and invited to attend a clinic assessment. The overall response rate for an interview and attending the clinic assessment was 49.4%.
Between 2004 and 2006, Stage 2 of the study was conducted. Where possible, all participants were contacted and invited to participate in a Computer Assisted Telephone interview (CATI), a self complete questionnaire and/or a clinic assessment. Stage 2 specifically focused on the collection of information relating to musculoskeletal conditions. Overall, n = 3,206 participants took part in the clinical assessment.
As part of the self completed questionnaire, information relating to demographics, self-reported prevalence of diabetes, levels of physical activity using the questions from the Australian National Health Survey  (the level of walking moderate or vigorous activity in the last two weeks) and health-related quality of life (the Medical Outcomes Study Short Form 36 (SF-36) were collected. As part of the clinic assessment, height, weight, waist and hip circumference were measured, blood was taken, and as part of the CATI, the self reported prevalence of osteoporosis and cardiovascular disease were determined. Participants were also asked about the presence of knee, hip and back pain ("Have you had pain or aching in your knee/hip/back, either at rest or when moving, on most days for at least a month?").
Data were weighted by age and sex, and probability of selection within the household, to the population of the north west suburbs of Adelaide. All analyses were undertaken using weighted data using SPSS Version 15. Frequencies were used to determine the prevalence of foot pain. Associations between foot pain, age and sex were undertaken using univariate logistic regression analyses to provide odds ratios. The association between foot pain and the remaining factors (BMI, selected chronic diseases and other areas of musculoskeletal pain) were determined using logistic regression analysis and including age and sex with in the model in order to adjust for these factors. As a result the impact of age and sex on the associations were determined. When examining the differences between males and females and age groups, in the proportion with foot pain at particular sites, Chi-square tests were undertaken. The mean health-related quality of life scores were determined using multiple analysis of variance (MANOVA). Age and sex were used as covariates in the analysis to adjust for their effects and the significant differences in scores between those with and without foot pain were determined. A significance level of p < 0.05 was used for all tests.
Demographic characteristics of NWAHS, Stage 2 clinic assessment. Values are n (%) unless otherwise noted.
20 to 34 years
35 to 44 years
45 to 54 years
55 to 64 years
65 to 74 years
75 years and over
Body mass index (kg/m2) – mean (SD)
Prevalence and correlates of foot pain
Within the cohort, 558 (17.4%) of participants indicated that they had foot pain on most days over the past month. Of those with foot pain, 349 (62.5%) had bilateral foot pain and 209 (37.5%) had unilateral foot pain.
Foot pain, age, sex and weight
Associations of foot pain with sex, age and weight.
OR (95% CI)
20 to 34 years
35 to 44 years
45 to 54 years
55 to 64 years
65 to 74 years
75 years and over
High waist:hip ratio†
Weight (per kg)
Foot pain, chronic conditions, physical activity and pain in other regions
Association of foot pain with chronic conditions and joint pain (adjusted for sex and age).
OR (95% CI)
1.34 (0.98 – 1.85)
Some level of activity
Foot pain location and sex
Prevalence of foot pain by location and sex.
% (95% CI)
% (95% CI)
% (95% CI)
Foot pain location and age
Location of foot pain, by age group (%).
20 to 34
35 to 44
45 to 54
55 to 64
65 to 74
SF-36 scores in participants with and without foot pain
Mean (SD) SF-36 scores for those with and without foot pain.
No foot pain (n = 2648)
Foot pain (n = 558)
Our study provides the first population-based estimates of foot pain in Australia. The findings indicate that approximately one in five people report foot pain, aching or stiffness, with a higher prevalence observed in females, those aged 50 years and over and those classified as obese. However, even in patients aged under the age of 45 years old, at least 10% reported foot pain.
The overall prevalence rate reported in this study is higher than that reported in the Cheshire Foot Pain and Disability Survey in the UK (10%) , but lower than that reported in the US National Health Interview Survey (24%)  and the Framingham Foot Study (28%) . These differences can be attributed to variations in the definitions of foot pain used in each study. The Cheshire survey used the case definition of the Manchester Foot Pain and Disability Index (MFPDI), which requires participants to have current foot pain, pain lasting at least one month, as well as recording at least one disability item on the questionnaire . As such, the MFPDI probably identifies more severe levels of foot pain than the question we used. In contrast, the US National Health Interview Survey recorded a wide range of foot conditions under the heading of foot "trouble" (including corns and calluses), some of which may not have been symptomatic . The Framingham Foot Study required participants to have pain on "most days" .
The associations reported between foot pain and age, female sex and obesity are largely consistent with previous reports. Prevalence studies involving participants across a wide age range have consistently found that older people have much higher rates of foot problems [7, 8, 17], which has been attributed to the cumulative effects of ageing on the integumentary, vascular and musculoskeletal structures of the foot. Similarly, several studies have found that women have a higher prevalence of foot pain than men [8, 11, 18, 19]. This has been attributed to the wearing of shoes with an elevated heel and narrow toe box, which has been shown to be associated with the development of corns, lesser toe deformities and hallux valgus (bunions) . However, the higher prevalence of foot pain may also reflect sex differences in pain tolerance in general, as women are more likely to report musculoskeletal pain and pain interference at other body regions . The association between foot pain and obesity can be partly explained by the significant increase in forces under the foot when walking in those who are obese  and the increased tendency for obese people to be flatfooted. Indeed, a recent case-control study indicated that those with chronic heel pain were three times more likely to be obese and four times more likely to have flat feet .
Although there was an increased prevalence of foot pain amongst those with self-reported diabetes, cardiovascular disease and osteoporosis, this did not reach significance following adjustment for age and sex. Previous studies have shown that foot problems are more common in older people with multiple chronic diseases [19, 24, 25], however in younger people foot pain is more likely to be related to overuse musculoskeletal conditions associated with physical activity (eg: plantar fasciitis) . Indeed, although a strong linear relationship between foot pain and increased age was observed, this association was revealed to be considerably more complex when foot pain was stratified according to location. While pain in the toes and forefoot generally increased with age, pain in the arch and heel decreased with age, pain in the hindfoot region demonstrated a U-shaped relationship with age, and pain in the ball of the foot was similar across all age-groups. As no clinical assessments were undertaken to ascertain the underlying cause of the pain, the reasons for these variable patterns are uncertain. However, it could be speculated that foot pain in younger age-groups is more likely to be musculoskeletal in origin, whereas foot pain in older people is more likely to be caused by toe deformities, corns and calluses.
Irrespective of the underlying cause, our results indicate that foot pain has a significant impact on health-related quality of life. Participants who reported foot pain demonstrated lower scores on the SF-36, and this association persisted after adjusting for age, sex and BMI. Although significant associations between the presence of foot problems, self-reported disability  and inability to perform activities of daily living [4, 18, 19] have been reported in older people, the association reported between foot pain and reduced health-related quality of life across such a broad age range is a novel finding. Of particular interest, those with foot pain demonstrated lower scores for not only the physical and bodily pain components of the SF-36, but also the social functioning and mental health components. This finding suggests that the impact of foot pain extends beyond localised pain and encompasses much broader aspects of health-related quality of life.
The major strength of this study is the use of a population-based sample with excellent response rates over a broad age range. However, it is acknowledged that the study has several limitations. Firstly, we defined foot pain according to a single question rather than using foot-specific questionnaires, such as the Manchester Foot Pain and Disability Index [3, 16] or Foot Health Status Questionnaire . Secondly, we were unable to examine the participants' feet in the study. We asked participants to indicate on a diagram (see Figure 1) the location of the foot pain, but did not ask which specific types of foot problem each participant had, or undertake any measurements of foot deformity. However, studies conducted in older people have indicated that only a small proportion of clinically-determined foot problems are reported as symptomatic [15, 28, 29]. Stronger associations have been reported for foot pain and pain in other regions of the body [9, 11, 24, 29, 30], suggesting that foot pain may develop as part of a generalised form of osteoarthritis or systemic pain condition.
This study indicates that although it has received relatively little attention in the epidemiological literature, foot pain is highly prevalent, even in young people, and has a significant detrimental impact on health-related quality of life. As the population ages and the prevalence of obesity increases, there is likely to be an increasing prevalence of foot pain. Further research is required to determine best practice models for managing foot pain and to determine whether the provision of foot care services, such as podiatry, are sufficient to meet this increasing demand.
This study received financial support from a grant from Human Services Research and Innovation Program (large projects) 2000–01, Department of Health, South Australia. HBM is currently a National Health and Medical Research Council fellow (Clinical Career Development Award, ID: 433049). We would also like to acknowledge the contribution of the NWAHS staff and participants.
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