Abstract
Objectives
The prevalence of thoracic kyphosis is considered to increase as the population is ageing in Japan. However, little is known about the clinical and preventive significance of kyphosis. The purpose of the study is to assess the association of kyphosis with subjective poor health and functional activity in the community-dwelling Japanese elderly. The relation of kyphosis with blood pressure, as a subclinical indicator of arteriosclerosis, is also examined.
Methods
The subjects consisted of 536 (male 241, female 295) elderly persons aged 65 years old and older. Trained examiners measured thoracic kyphosis using a flexicurve, and kyphosis index was calculated. Information on the subjects’ subjective poor health and functional activity were collected through a face-to-face interview, and blood pressure was measured by a conventional method.
Results
In females, their kyphosis index increased with age increased, whereas in males, there was no clear age-related change. An increased kyphosis index was associated with subjective poor health only among females. Compared with the lowest kyphosis index tertile, adjusted odds ratios for being in poor health were 5.4 (95% confidence interval: 1.1–27.4) in the middle tertile, and 6.4 (95% confidence interval: 1.3–32.1) in the highest tertile. Kyphosis index did not seem to be associated with functional activity score and blood pressure both in males and females even after adjustment.
Conclusions
Kyphosis is associated with subjective poor health in the community-dwelling female elderly in this study population, but not with functional activity and blood pressure both in males and females.
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References
Ettinger B, Black DM, Nevitt MC, Rundle AC, Cauley JA, Cummings SR, et al. Contribution of vertebral deformities to chronic back pain and disability. The Study of Osteoporotic Fractures Research Group. J Bone Miner Res. 1992; 7: 449–456.
Mika A, Unnithan VB, Mika P. Differences in thoracic kyphosis and in back muscle strength in women with bone loss due to osteoporosis. Spine. 2005; 30: 241–246.
Lundon KM, Li AM, Bibershtein S. Interrater and intrarater reliability in the measurement of kyphosis in postmenopausal women with osteoporosis. Spine. 1998; 23: 1978–1985.
Di Bari M, Chiarlone M, Matteuzzi D, Zacchei S, Pozzi C, Bellia V, et al. Thoracic kyphosis and ventilatory dysfunction in unselected older persons: an epidemiological study in Dicomano, Italy. J Am Geriatr Soc. 2004; 52: 909–915.
Ryan SD, Fried LP. The impact of kyphosis on daily functioning. J Am Geriatr Soc. 1997; 45: 1479–1486.
Miyakoshi N, Itoi E, Kobayashi M, Kodama H. Impact of postural deformities and spinal mobility on quality of life in postmenopausal osteoporosis. Osteoporos Int. 2003; 14: 1007–1012.
Kado DM, Browner WS, Palermo L, Nevitt MC, Genant HK, Cummings SR. Vertebral fractures and mortality in older women: a prospective study. Study of Osteoporotic Fractures Research Group. Arch Intern Med. 1999; 159: 1215–1220.
Milne JS, Lauder IJ. Factors associated with mortality in older people. Age Ageing. 1978; 7: 129–137.
Takahashi T, Ishida K, Hirose D, Nagano Y, Okumiya K, Nishinaga M, et al. Trunk deformity is associated with a reduction in outdoor activities of daily living and life satisfaction in community-dwelling older people. Osteoporos Int. 2005; 16: 273–279.
Kado DM, Huang MH, Karlamangla AS, Barrett-Connor E., Greendale GA. Hyperkyphotic posture predicts mortality in older community-dwelling men and women: a prospective study. J Am Geriatr Soc. 2004; 52: 1662–1667.
Idler EL, Kasl S. Health perceptions and survival: do global evaluations of health status really predict mortality? J Gerontol. 1991; 46: S55–65.
Neale R, Brayne C, Johnson AL. Cognition and survival: an exploration in a large multicentre study of the population aged 65 years and over. Int J Epidemiol. 2001; 30: 1383–1388.
Scott WK, Macera CA, Cornman CB, Sharpe PA. Functional health status as a predictor of mortality in men and women over 65. J Clin Epidemiol. 1997; 50: 291–296.
Milne JS, Lauder IJ. Age effects in kyphosis and lordosis in adults. Ann Hum Biol. 1974; 1: 327–337.
Koyano W, Shibata H, Nakazato K, Haga H, Suyama Y. Measurement of competence: reliability and validity of the TMIG Index of Competence. Arch Gerontol Geriatr. 1991; 13: 103–116.
Koyano W, Hashimoto M, Fukawa T, Shibata H, Gunji A. Functional capacity of the elderly: measurement by the TMIG Index of Competence. Nippon Koshu Eisei Zasshi. 1993; 40: 468–474. (Article in Japanese)
Altman D. Practical Statistics for Medical Research. London: Chapman & Hall; 1991.
Mossey JM, Shapiro E. Self-rated health: a predictor of mortality among the elderly. Am J Public Health. 1982; 72: 800–808.
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Nishiwaki, Y., Kikuchi, Y., Araya, K. et al. Association of thoracic kyphosis with subjective poor health, functional activity and blood pressure in the community-dwelling elderly. Environ Health Prev Med 12, 246–250 (2007). https://doi.org/10.1007/BF02898031
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DOI: https://doi.org/10.1007/BF02898031