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Reference Values and Age Differences in Body Composition of Community-Dwelling Older Japanese Men and Women: A Pooled Analysis of Four Cohort Studies.

Seino S, Shinkai S, Iijima K, Obuchi S, Fujiwara Y, Yoshida H, Kawai H, Nishi M, Murayama H, Taniguchi Y, Amano H, Takahashi R - PLoS ONE (2015)

Bottom Line: FFMI and SMI decreased significantly with age in both sexes (P < 0.001 for trends), but FFMI remained constant among the women with only a 1% decrease up to age 84 years.Percentage FM increased significantly, with age (P < 0.001 in men and P = 0.045 in women for trends), but FMI was unchanged in both sexes (P = 0.147 in men and P = 0.176 in women for trends).The small age-related decrease in FFMI may be a noteworthy characteristic of body composition change in older Japanese women.

View Article: PubMed Central - PubMed

Affiliation: Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae, Itabashi, Tokyo, Japan.

ABSTRACT

Objectives: To determine age- and sex-specific body composition reference values and investigate age differences in these parameters for community-dwelling older Japanese men and women, using direct segmental multi-frequency bioelectrical impedance analysis.

Methods: We conducted a pooled analysis of data collected in four cohort studies between 2008 and 2012: Kusatsu Longitudinal Study, Hatoyama Cohort Study, Itabashi Cohort Study, and Kashiwa Cohort Study. The pooled analysis included cross-sectional data from 4478 nondisabled, community-dwelling adults aged 65-94 years (2145 men, 2333 women; mean age: 72.9 years in men and 72.6 years in women). Body weight, fat mass (FM), percentage FM, fat-free mass (FFM), and appendicular lean soft tissue mass were measured using the InBody 720 and 430 (Biospace Co. Ltd, Seoul, Korea). The values were then normalized by height in meters squared to determine body mass index (BMI), FM index (FMI), FFM index (FFMI), and skeletal muscle mass index (SMI).

Results: Simple means (standard deviation) of BMI, percentage FM, FMI, FFMI, and SMI were 23.4 (2.9) kg/m(2), 24.9 (6.3)%, 5.96 (2.09) kg/m(2), 17.4 (1.5) kg/m(2), and 7.29 (0.76) kg/m(2), respectively, in men and 22.7 (3.3) kg/m(2), 31.7 (7.1)%, 7.40 (2.61) kg/m(2), 15.3 (1.2) kg/m(2), and 5.86 (0.67) kg/m(2), respectively, in women. We then calculated quartiles and quintiles for these indices after stratifying for sex and 5-year age group. FFMI and SMI decreased significantly with age in both sexes (P < 0.001 for trends), but FFMI remained constant among the women with only a 1% decrease up to age 84 years. Percentage FM increased significantly, with age (P < 0.001 in men and P = 0.045 in women for trends), but FMI was unchanged in both sexes (P = 0.147 in men and P = 0.176 in women for trends).

Conclusion: The present data should be useful in the clinical evaluation of body composition of older Japanese and for international comparisons. The small age-related decrease in FFMI may be a noteworthy characteristic of body composition change in older Japanese women.

No MeSH data available.


Related in: MedlinePlus

Percentage by which body composition parameters (A-H) in each age group and sex differed from those in age group 65–69 years.A = weight, B = body mass index (BMI): weight (kg)/height (m)2, C = fat mass (FM), D = fat mass index (FMI): FM (kg)/ height (m)2, E = fat-free mass (FFM), F = fat-free mass index (FFMI): FFM (kg)/ height (m)2, G = appendicular lean soft tissue mass (ALM), and H = skeletal muscle mass index (SMI): ALM (kg)/ height (m)2.
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pone.0131975.g002: Percentage by which body composition parameters (A-H) in each age group and sex differed from those in age group 65–69 years.A = weight, B = body mass index (BMI): weight (kg)/height (m)2, C = fat mass (FM), D = fat mass index (FMI): FM (kg)/ height (m)2, E = fat-free mass (FFM), F = fat-free mass index (FFMI): FFM (kg)/ height (m)2, G = appendicular lean soft tissue mass (ALM), and H = skeletal muscle mass index (SMI): ALM (kg)/ height (m)2.

Mentions: Tables 2 and 3 show the means and SDs for body composition parameters according to age group in men and women, respectively. Fig 2 shows the percentage differences in weight, FM, FFM, ALM and their indices for each age group as compared with respective values for the age group 65–69 years (which we refer to as age-related change in this study). In both sexes, weight, FFM, FFMI, ALM, and SMI showed significant decreasing trends with advancing age. Although the age-related changes in weight, FFM, and ALM diminished in both sexes when indexed, age-related decreases in BMI, FFMI, and SMI were still pronounced in men. BMI had a significant decreasing trend in men but was unchanged in women. In contrast, although absolute FM remained unchanged in men, there was a significant downward trend in women. Percentage FM showed significant increasing trends in both sexes, but FMI did not change in either sex.


Reference Values and Age Differences in Body Composition of Community-Dwelling Older Japanese Men and Women: A Pooled Analysis of Four Cohort Studies.

Seino S, Shinkai S, Iijima K, Obuchi S, Fujiwara Y, Yoshida H, Kawai H, Nishi M, Murayama H, Taniguchi Y, Amano H, Takahashi R - PLoS ONE (2015)

Percentage by which body composition parameters (A-H) in each age group and sex differed from those in age group 65–69 years.A = weight, B = body mass index (BMI): weight (kg)/height (m)2, C = fat mass (FM), D = fat mass index (FMI): FM (kg)/ height (m)2, E = fat-free mass (FFM), F = fat-free mass index (FFMI): FFM (kg)/ height (m)2, G = appendicular lean soft tissue mass (ALM), and H = skeletal muscle mass index (SMI): ALM (kg)/ height (m)2.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4492501&req=5

pone.0131975.g002: Percentage by which body composition parameters (A-H) in each age group and sex differed from those in age group 65–69 years.A = weight, B = body mass index (BMI): weight (kg)/height (m)2, C = fat mass (FM), D = fat mass index (FMI): FM (kg)/ height (m)2, E = fat-free mass (FFM), F = fat-free mass index (FFMI): FFM (kg)/ height (m)2, G = appendicular lean soft tissue mass (ALM), and H = skeletal muscle mass index (SMI): ALM (kg)/ height (m)2.
Mentions: Tables 2 and 3 show the means and SDs for body composition parameters according to age group in men and women, respectively. Fig 2 shows the percentage differences in weight, FM, FFM, ALM and their indices for each age group as compared with respective values for the age group 65–69 years (which we refer to as age-related change in this study). In both sexes, weight, FFM, FFMI, ALM, and SMI showed significant decreasing trends with advancing age. Although the age-related changes in weight, FFM, and ALM diminished in both sexes when indexed, age-related decreases in BMI, FFMI, and SMI were still pronounced in men. BMI had a significant decreasing trend in men but was unchanged in women. In contrast, although absolute FM remained unchanged in men, there was a significant downward trend in women. Percentage FM showed significant increasing trends in both sexes, but FMI did not change in either sex.

Bottom Line: FFMI and SMI decreased significantly with age in both sexes (P < 0.001 for trends), but FFMI remained constant among the women with only a 1% decrease up to age 84 years.Percentage FM increased significantly, with age (P < 0.001 in men and P = 0.045 in women for trends), but FMI was unchanged in both sexes (P = 0.147 in men and P = 0.176 in women for trends).The small age-related decrease in FFMI may be a noteworthy characteristic of body composition change in older Japanese women.

View Article: PubMed Central - PubMed

Affiliation: Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae, Itabashi, Tokyo, Japan.

ABSTRACT

Objectives: To determine age- and sex-specific body composition reference values and investigate age differences in these parameters for community-dwelling older Japanese men and women, using direct segmental multi-frequency bioelectrical impedance analysis.

Methods: We conducted a pooled analysis of data collected in four cohort studies between 2008 and 2012: Kusatsu Longitudinal Study, Hatoyama Cohort Study, Itabashi Cohort Study, and Kashiwa Cohort Study. The pooled analysis included cross-sectional data from 4478 nondisabled, community-dwelling adults aged 65-94 years (2145 men, 2333 women; mean age: 72.9 years in men and 72.6 years in women). Body weight, fat mass (FM), percentage FM, fat-free mass (FFM), and appendicular lean soft tissue mass were measured using the InBody 720 and 430 (Biospace Co. Ltd, Seoul, Korea). The values were then normalized by height in meters squared to determine body mass index (BMI), FM index (FMI), FFM index (FFMI), and skeletal muscle mass index (SMI).

Results: Simple means (standard deviation) of BMI, percentage FM, FMI, FFMI, and SMI were 23.4 (2.9) kg/m(2), 24.9 (6.3)%, 5.96 (2.09) kg/m(2), 17.4 (1.5) kg/m(2), and 7.29 (0.76) kg/m(2), respectively, in men and 22.7 (3.3) kg/m(2), 31.7 (7.1)%, 7.40 (2.61) kg/m(2), 15.3 (1.2) kg/m(2), and 5.86 (0.67) kg/m(2), respectively, in women. We then calculated quartiles and quintiles for these indices after stratifying for sex and 5-year age group. FFMI and SMI decreased significantly with age in both sexes (P < 0.001 for trends), but FFMI remained constant among the women with only a 1% decrease up to age 84 years. Percentage FM increased significantly, with age (P < 0.001 in men and P = 0.045 in women for trends), but FMI was unchanged in both sexes (P = 0.147 in men and P = 0.176 in women for trends).

Conclusion: The present data should be useful in the clinical evaluation of body composition of older Japanese and for international comparisons. The small age-related decrease in FFMI may be a noteworthy characteristic of body composition change in older Japanese women.

No MeSH data available.


Related in: MedlinePlus