TY - JOUR
T1 - Hemoglobin Levels and Skeletal Muscle
T2 - Results from the InCHIANTI Study
AU - Cesari, Matteo
AU - Penninx, Brenda W J H
AU - Lauretani, Fulvio
AU - Russo, Cosimo R.
AU - Carter, Christy
AU - Bandinelli, Stefania
AU - Atkinson, Hal
AU - Onder, Graziano
AU - Pahor, Marco
AU - Ferrucci, Luigi
PY - 2004/3
Y1 - 2004/3
N2 - Background. Anemia is associated with reduced physical performance and muscle strength. The aim of the study was to explore whether anemia and hemoglobin levels are associated with differences in quantitative and qualitative measures of muscle and fat. Methods. The study sample consisted of 909 participants 65 years and older enrolled in the "Invecchiare in Chianti" (InCHIANTI) study, a prospective population-based study of older people aimed at identifying risk factors for late-life disability. All the analyses were performed considering continuous hemoglobin levels as well as the dichotomous anemia variable (defined according to World Health Organization criteria as hemoglobin <12 g/dL in women and <13 g/dL in men). A peripheral quantitative computed tomography (pQCT) scan was performed in all participants to evaluate total, muscular, and fat cross-sectional areas of the calf and relative muscle density. Ankle extension strength was measured using a hand-held dynamometer. Linear regression analyses were used to assess the multivariate relationship of pQCT and skeletal muscle strength measures with hemoglobin levels and anemia after adjustment for demographics, chronic conditions, medication use, and other biological variables. Results. Participants were aged 74.8 ± 6.8 years. In our sample, 94 participants (10.3%) were anemic. Hemoglobin levels were significantly associated with muscle density (β = 0.225 [SE, standard error 0.098], p =.02), muscle area/total area ratio (β = 0.778 [SE 0.262], p = .003), fat area/total area ratio (β = -0.869 [SE 0.225]; p <.001). Skeletal muscle strength and muscle density were highly associated with anemia (β = -3.266 [SE 1.173], p = .005 and β = -0.816 [SE 0.374], p = .03, respectively). Results did not change when analyses were rerun in a restricted sample of participants not affected by major medical conditions. Conclusion. The present study shows that hemoglobin levels are associated with the parameters of body composition obtained by pQCT, and that decreases in muscular strength measures occur in the presence of anemia.
AB - Background. Anemia is associated with reduced physical performance and muscle strength. The aim of the study was to explore whether anemia and hemoglobin levels are associated with differences in quantitative and qualitative measures of muscle and fat. Methods. The study sample consisted of 909 participants 65 years and older enrolled in the "Invecchiare in Chianti" (InCHIANTI) study, a prospective population-based study of older people aimed at identifying risk factors for late-life disability. All the analyses were performed considering continuous hemoglobin levels as well as the dichotomous anemia variable (defined according to World Health Organization criteria as hemoglobin <12 g/dL in women and <13 g/dL in men). A peripheral quantitative computed tomography (pQCT) scan was performed in all participants to evaluate total, muscular, and fat cross-sectional areas of the calf and relative muscle density. Ankle extension strength was measured using a hand-held dynamometer. Linear regression analyses were used to assess the multivariate relationship of pQCT and skeletal muscle strength measures with hemoglobin levels and anemia after adjustment for demographics, chronic conditions, medication use, and other biological variables. Results. Participants were aged 74.8 ± 6.8 years. In our sample, 94 participants (10.3%) were anemic. Hemoglobin levels were significantly associated with muscle density (β = 0.225 [SE, standard error 0.098], p =.02), muscle area/total area ratio (β = 0.778 [SE 0.262], p = .003), fat area/total area ratio (β = -0.869 [SE 0.225]; p <.001). Skeletal muscle strength and muscle density were highly associated with anemia (β = -3.266 [SE 1.173], p = .005 and β = -0.816 [SE 0.374], p = .03, respectively). Results did not change when analyses were rerun in a restricted sample of participants not affected by major medical conditions. Conclusion. The present study shows that hemoglobin levels are associated with the parameters of body composition obtained by pQCT, and that decreases in muscular strength measures occur in the presence of anemia.
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M3 - Article
C2 - 15031309
AN - SCOPUS:12144288921
SN - 1079-5006
VL - 59
SP - 249
EP - 254
JO - Journals of Gerontology - Series A Biological Sciences and Medical Sciences
JF - Journals of Gerontology - Series A Biological Sciences and Medical Sciences
IS - 3
ER -