Diabetes mellitus and functional impairment in Taiwanese older men and women

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Abstract

Type 2 diabetes mellitus is strongly related to many kinds of functional impairment, even after adjusting for demographic and comorbid conditions. The current study examined sex differences in the relationships between Type 2 diabetes mellitus and functional impairment in an Asian population sample. Data were obtained from a national survey, the Social Environment and Biomarkers of Aging Study (SEBAS) in Taiwan. A total of 652 older adults aged ≥65 years were included in the study. Pearson's χ2-test and multiple logistic regression analysis were used to examine the relationships between diabetes and functional impairments in older men and women. The reported numbers of impairments were significantly higher in women, in those aged ≥75 years, and in those with diabetes. There were sex and age differences in the relationships between diabetes and functional difficulties. Even after adjustment for age, education, and co-morbid conditions, men with diabetes were about four times more likely to have difficulties related to self-care, and women with diabetes were about two to three times more likely to have difficulties related to higher functioning than their non-diabetic counterparts. Sex differences should be considered when understanding the relationships between diabetes and functional impairments in older adults.

Introduction

Several cross-sectional and longitudinal studies have found that type 2 diabetes mellitus (DM) is strongly related to many kinds of functional impairments, including problems with mobility, balance, housework, and self-care, in older adults. These relationships remained significant even after adjusting for demographic factors (e.g., age, sex, education, and ethnicity) and common diabetes-related and diabetes-unrelated comorbidities (e.g., Rekeneire et al., 2003; Wray et al., 2005). Gender differences in functioning have been found in many studies involving older adults (Rahman and Liu, 2000; Liang et al., 2008). Although most of the studies focusing on diabetes and functioning partially accounted for the sex effect, only a few further explored the differences in the relationship between diabetes and functional impairment between older men and women (Gregg et al., 2000). Furthermore, it is unclear whether the results are applicable to older Asian people, because most of these studies took place in Western populations (e.g., Maty et al., 2004; Sinclair et al., 2008); Asian studies have been relatively rare (Chou and Chi, 2005).

In 2006, the prevalence of diabetes in Taiwan was around 14.5% in elderly men and 13.9% in elderly women (Chen et al., 2001); people with diabetes had relatively higher mortality rates (Tseng, 2004), and diabetes was ranked the fourth cause of death (Department of Health, Taiwan, 2006). The current study aimed to assess the sex differences in functional impairment related to diabetes in elderly Taiwanese people, and to examine if these relationships remained significant after adjusting for demographic factors and comorbidities.

Section snippets

Study population

The data used in this study were from the Social Environment and Biomarkers of Aging Study (SEBAS) in Taiwan, which was a random subsample of an ongoing survey, the Taiwan Longitudinal Study on Aging (TLSA). The TLSA began in 1989 with a nationally representative sample of persons 60 years and older. The SEBAS survey procedures were approved by the institutional review boards at the Bureau of Health Promotion of the Department of Health, Taiwan, Princeton University, and Georgetown University,

Results

Of the 652 participants, 388 (59.5%) were men and 264 (40.5%) were female. The prevalence of diabetes was significantly lower for men than for women in the whole sample (13.9% vs. 28.4%, χ2 = 20.8, p < 0.001). However, there were no age-group differences in the prevalence of diabetes in either men or women. Compared to those without diabetes, men and women with diabetes were more likely to have high blood pressure (men: 51.9% vs. 36.5%; women: 50.7% vs. 36.7%). Women with diabetes were more

Discussion

The present research shows that sex and age differences should be considered when understanding the relationships between diabetes and functional impairments in older adults. Women in the younger old group with diabetes were at higher risk for functional impairment than their counterparts without diabetes in three of nine physical function tasks and in three of five higher functioning tasks. However, women in the older old group with diabetes were only at higher risk in two of the nine physical

Conclusion

Based on data from an Eastern population, Taiwan, the current study found gender and age differences in the relationship between of diabetes and functional impairment. Even after adjustment for age, education, and co-morbidities, men with diabetes were about four times more likely to have difficulties related to self-care impairment; while women with diabetes were about two to three times as likely to have difficulties related to higher functioning impairment, than their non-diabetic

Conflict of interest statement

None.

Acknowledgements

The descriptions or conclusions herein do not represent the viewpoint of the Bureau of Health Promotion, Department of Health, Taiwan.

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